JP2012015857

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DESCRIPTION JP2012015857
The present invention provides a signal processing system with high arrangement of processing
devices and a speaker system with high arrangement of speaker units. In a signal processing
system (speaker system 100), each of two processing devices (speaker units 110 and 120)
includes at least one of a radio wave transmitter 122a and a set of two radio wave receivers 113a
and 113b. Do. Furthermore, in the speaker system 100, the arrangement of the two speaker units
110 and 120 is determined based on the reception of the radio wave signals by the radio wave
receivers 113a and 113b. Then, the output channel switching control unit 112 sorts and
transmits the two sound signals to the speakers of the two speaker units 110 and 120 based on
the determined arrangement. [Selected figure] Figure 5
Signal processing system and speaker system
[0001]
The present case relates to a signal processing system comprising a plurality of processing units,
each processing a signal, and a loudspeaker system comprising a plurality of loudspeaker units,
each comprising a loudspeaker.
[0002]
BACKGROUND Conventionally, a speaker system is known that allows a user to hear a realistic
sound by using a plurality of speaker units each mounted with a speaker (see, for example,
Patent Documents 1 and 2).
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Here, in many cases, in such a speaker system, a sound signal representing a sound according to
the position of the speaker unit in which the speaker is mounted is input to each speaker. As a
result, assuming that the user puts himself in an actual sound field, a sound that would be heard
from the position of each speaker unit is generated by each speaker, and a realistic sound is
realized.
[0003]
JP, 2006-101248, A JP, 2009-17137, A
[0004]
In recent years, the demand for more realistic sound is increasing, and as a result, the number of
speaker units constituting the speaker system tends to increase.
For example, there is an example of a 5.1 channel surround system provided with speaker units
for left and right front and left and right main sounds and speaker units for subwoofers that
perform bass reproduction. As described above, in the speaker system having a large number of
speaker units, an error is likely to occur in the arrangement of the speaker units. Then, if the
speaker unit is disposed at the wrong position, the user may feel uncomfortable with the sound
heard from the speaker system.
[0005]
Here, the low level of the arrangement of the speaker units has been described by taking the
speaker system as an example. However, the arbitrary lowness of such an arrangement is not
limited to the speaker system, but can occur commonly for signal processing systems in general
comprising a plurality of processing devices each performing processing on a signal.
[0006]
SUMMARY OF THE INVENTION In view of the above-described circumstances, it is an object of
the present invention to provide a signal processing system in which the disposition of the
processing device is highly arbitrary and a speaker system in which the disposition of the
speaker unit is highly arbitrary.
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[0007]
A signal processing system for achieving the above object comprises a plurality of processing
devices, a transmitter, a detector, an arrangement determining unit, and a signal sorting unit.
[0008]
The plurality of processing devices each receive a signal and perform processing on the signal.
[0009]
A transmitter is one that emits a wireless signal.
[0010]
The detector is for detecting a wireless signal emitted by the transmitter.
[0011]
In this signal processing system, each of the plurality of processing devices is provided with at
least one of the transmitter and the detector.
[0012]
The placement determining unit determines the placement of the plurality of processing devices
based on the detection of the wireless signal by the detector.
[0013]
The signal sorting unit sorts and transmits a plurality of signals to each of the plurality of
processing devices based on the arrangement determined by the arrangement determining unit.
[0014]
Moreover, the speaker system which achieves the said objective is equipped with the several
speaker unit, the transmitter, the detector, the arrangement ¦ positioning judgment part, and the
sound signal classification part.
[0015]
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Each of the plurality of speaker units is mounted with a speaker that receives a sound signal
representing a sound and emits a sound represented by the sound signal.
[0016]
A transmitter is one that emits a wireless signal.
[0017]
The detector is for detecting a wireless signal emitted by the transmitter.
[0018]
In this speaker system, each of the plurality of speaker units is mounted with at least one of the
transmitter and the detector.
[0019]
The placement determining unit determines the placement of the plurality of speaker units based
on the detection of the wireless signal by the detector.
[0020]
The sound signal sorting unit sorts and transmits a plurality of sound signals to the speakers
mounted in each of the plurality of speaker units based on the arrangement determined by the
arrangement determining unit.
[0021]
According to the present invention, it is possible to obtain a signal processing system in which
the disposition of the processing device is highly arbitrary, and a speaker system in which the
disposition of the speaker unit is highly arbitrary.
[0022]
It is a schematic diagram which shows the speaker system of a comparative example.
It is a block diagram which shows the speaker system shown in FIG.
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FIG. 1 is a block diagram illustrating a first embodiment of a signal processing system and a
speaker system.
It is a hierarchy figure showing a 2nd embodiment of a signal processing system and a speaker
system.
It is a schematic diagram which shows the speaker system shown in FIG.
It is a block diagram which shows the speaker system shown to FIG. 4 and FIG.
It is a figure which shows typically exchange of the electromagnetic wave signal between two
radio wave receivers of a 1st speaker unit, and the radio wave transmitter of a 2nd speaker unit.
It is a block diagram which shows the detail of the output channel switching control part shown
to FIGS.
It is a flowchart which shows the flow of the sound output process in the speaker system shown
to FIGS.
It is a hierarchy figure showing a 3rd embodiment of a signal processing system and a speaker
system.
It is a schematic diagram which shows the speaker system shown in FIG.
It is a block diagram which shows the speaker system shown to FIG. 10 and FIG.
It is a figure which shows typically a mode that the test sound generate ¦ occur ¦ produced with
the 2nd speaker of a 2nd speaker unit is detected by two microphones of a 1st speaker unit.
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It is a block diagram which shows the detail of the output channel switching control part shown
to FIGS.
It is a flowchart which shows the flow of the sound output process in the speaker system shown
to FIGS.
It is a hierarchy figure showing a 4th embodiment of a signal processing system and a speaker
system.
It is a schematic diagram which shows the speaker system shown in FIG. FIG. 18 is a block
diagram showing the speaker system shown in FIGS. 16 and 17; It is a figure which shows
typically operation ¦ movement of the wireless tag of a 2nd speaker unit, and the wireless
receiver of a 1st speaker unit. It is a block diagram which shows the detail of the output channel
switching control part shown to FIGS. It is a flowchart which shows the flow of the sound output
process in the speaker system shown to FIGS.
[0023]
Hereinafter, prior to the description of specific embodiments of the signal processing system and
the speaker system of the present invention, first, a comparative example for comparison with
the embodiments will be described.
[0024]
FIG. 1 is a schematic view showing a speaker system of a comparative example.
FIG. 2 is a block diagram showing the speaker system shown in FIG.
[0025]
The speaker system 500 of the comparative example shown in FIGS. 1 and 2 is a speaker system
of a type in which two speaker units 510 and 520 are arranged side by side facing the user who
listens to the sound.
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[0026]
Here, in the speaker system 500 of this comparative example and the speaker system of the
embodiment described later, the right side when the user is viewed from the speaker unit facing
the user is treated as the right side in the system, and the left side at that time is the system It is
treated as the left side of.
[0027]
In FIG. 1, a state in which the speaker system 500 of the comparative example is viewed from the
user side is illustrated, so the left and right of the appearance in this figure and the right and left
in the speaker system 500 of the comparative example are shown in opposite directions. There
is.
[0028]
A speaker is mounted on each of the two speaker units 510 and 520.
Here, hereinafter, the speaker unit disposed on the right side is referred to as an R-side speaker
unit 510, and the speaker mounted on the R-side speaker unit 510 is referred to as an R-side
speaker 511.
Further, a speaker unit disposed on the left side is referred to as an L-side speaker unit 520, and
a speaker mounted on the L-side speaker unit 520 is referred to as an L-side speaker 521.
[0029]
The speaker system 500 of this comparative example further includes a power supply 531 and
first and second connection cables 532 and 533.
[0030]
The power supply 531 supplies power to the speaker system 500 of this comparative example.
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The power supply 531 is not specified here, but includes a power supply cable for supplying a
commercial power, a DC power supply which houses a battery and supplies DC power from the
battery.
The power supply 531 is connected to the R-side speaker unit 510.
[0031]
The first connection cable 532 is a cable that connects the sound source device 550 to the
speaker system 500 of this comparative example. Although not specified here, the sound source
device 550 corresponds to various drives, televisions, and the like that access a recording
medium in which music, a movie, and the like are recorded. The sound source device 550
outputs a sound signal representing a sound generated by the speaker of each speaker unit.
Then, the sound signal from the sound source device 550 is input to the speaker system 500 of
this comparative example through the first connection cable 532.
[0032]
Here, the sound source device 550 is strictly connected to the R-side speaker unit 510 via the
first connection cable 532. Further, as the above-mentioned sound signal, a sound signal for the
R-side speaker 511 located on the right (R-side sound signal) and a sound signal for the L-side
speaker 521 located on the left (L-side sound signal) are sound sources. It is output from the
device 550. Then, both the R side sound signal and the L side sound signal are input to the R side
speaker unit 510 from the sound source device 550 through the first connection cable 532.
[0033]
The second connection cable 533 connects the R-side speaker unit 510 and the L-side speaker
unit 520 to each other.
[0034]
The R-side speaker unit 510 includes an amplifier unit 512 and a power supply unit 513 in
addition to the R-side speaker 511.
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[0035]
The R side sound signal and the L side sound signal output from the sound source device 550 are
input to the amplifier unit 512.
The amplifier unit 512 amplifies the two sound signals.
Then, the amplifier unit 512 inputs the amplified R-side sound signal to the R-side speaker 511.
In addition, the amplifier unit 512 inputs the amplified L-side sound signal to the L-side speaker
521 of the L-side speaker unit 520 via the second connection cable 533 described above.
[0036]
The power supply unit 513 performs power conversion processing not specified here, such as
converting the input power into DC power of a size usable by the amplifier unit 512, for example,
when the power is commercial AC power. It plays a role of supplying to the amplifier unit 512.
[0037]
In the speaker system 500 of the comparative example described above, the R-side speaker 511
generates the right sound of the sound site, and the L-side speaker 521 generates the left sound
of the sound site.
As a result, in the speaker system 500 of the comparative example, a sound having a sense of
reality as if being heard at the sound site is generated.
[0038]
In order to generate a realistic sound with no sense of discomfort for the user without disturbing
the sound of such a sound site, the R side speaker unit 510 is surely disposed on the right side,
and the L side speaker unit 520 is surely on the left side. Need to be placed.
[0039]
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Here, in this comparative example, a speaker system 500 including two speaker units 510 and
520 is illustrated to simplify the description.
However, in recent years, the demand for more realistic sound is increasing, and as a result, the
number of speaker units constituting the speaker system tends to increase as in a 5.1 channel
surround system or the like.
[0040]
On the other hand, most of the users who use such speaker systems, except for some audiophiles,
are amateurs of sound equipment, and it is now apt to make mistakes in the arrangement of
speaker units. is there. Then, if the speaker unit is disposed at the wrong position, the user may
feel uncomfortable with the sound heard from the speaker system.
[0041]
Although the low level of the arrangement of the speaker unit has been described by taking the
speaker system as an example, the low level of the arrangement of such a unit is not limited to
the speaker system. For example, a system may be considered in which a plurality of display
devices are disposed at predetermined positions and an image corresponding to the position is
displayed on the display device at each position. Even in such a system, when the display device
is disposed at the wrong position, the user may feel uncomfortable with the image displayed on
the display device. Further, for example, a system may be considered in which a plurality of
computer devices are disposed at predetermined positions, and a signal corresponding to the
position is sent to the computer device at each position for processing. Even in such a system, if
the computer device is placed in the wrong position, the user may feel uncomfortable with the
processing result in the computer device. In this way, the arbitrary lowness of the arrangement
can commonly occur for signal processing systems in general comprising a plurality of
processing units each performing processing on a signal.
[0042]
Therefore, in the specific embodiment of the signal processing system and the speaker system of
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the present invention described below, any processing apparatus is used so that processing that
does not cause a sense of discomfort is performed regardless of how the processing apparatus is
arranged by the user. Placement is possible. Specifically, any arrangement of the speaker units is
possible such that a sound without a sense of incongruity is generated no matter how the
speakers are arranged by the user.
[0043]
First, a first embodiment of the signal processing system and the speaker system of the present
invention will be described.
[0044]
FIG. 3 is a block diagram showing a first embodiment of a signal processing system and a
speaker system.
[0045]
In FIG. 3, a speaker system 10 having a plurality of speaker units 10 is shown as an embodiment
of a signal processing system having a plurality of processing devices each of which receives a
signal and executes processing on the signal. It is shown.
[0046]
The speaker system 1 shown in FIG. 3 includes a plurality of speaker units 10, a transmitter 20, a
detector 30, a placement determination unit 40, and a sound signal sorting unit 50.
[0047]
Each of the plurality of speaker units 10 is mounted with a speaker 11 that receives a sound
signal representing a sound and emits a sound represented by the sound signal.
[0048]
The transmitter 20 emits a wireless signal.
[0049]
Here, the wireless signal indicates a signal using a wirelessly transmitted medium such as radio
waves, sounds, infrared rays, light and the like.
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[0050]
The detector 30 detects a wireless signal emitted by the transmitter 20.
[0051]
In this speaker system 1, each of the plurality of speaker units 10 is mounted with at least one of
the transmitter 20 and the detector 30.
[0052]
The fact that each of the plurality of speaker units has at least one of the transmitter and the
detector mounted means that there is no speaker unit not mounted on any of the transmitter and
the detector.
Accordingly, this mounting form includes the following form in addition to the form shown in
FIG. 3 in which one speaker unit mounts a transmitter and another speaker unit mounts a
detector.
That is, in this mounting form, a form in which each of a plurality of speaker units mounts both a
transmitter and a detector, a form in which all speaker units mount only a transmitter, and all the
speaker units are only a detector The form which carried the is also included.
In the form in which all the speaker units are equipped with only the transmitter, a detector not
mounted on the speaker unit is provided independently of the speaker unit.
Similarly, in the configuration in which all the speaker units are equipped with only the detector,
a transmitter not mounted in the speaker unit is provided independently of the speaker unit.
[0053]
The placement determining unit 40 determines the placement of the plurality of speaker units 10
based on the detection of the wireless signal by the detector 30.
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[0054]
The sound signal sorting unit 50 sorts and transmits a plurality of sound signals to the speakers
11 mounted in each of the plurality of speaker units 10 based on the arrangement determined by
the arrangement determining unit 40.
[0055]
In the speaker system 1 of the first embodiment, the arrangement of a plurality of speaker units
is measured.
Then, based on the measured arrangement, sorting of the sound signal to the speakers 11 is
performed.
As described above, in the speaker system 1 according to the first embodiment, since the sound
signals are sorted based on the actual arrangement of the plurality of speaker units 10, the
speakers 11 of each speaker unit 10 should resonate from the direction of the speaker units 10
It will generate a sound.
For this reason, the generation of a sound without a sense of discomfort for the user is surely
realized.
Furthermore, in this speaker system 1, even if the user arranges the plurality of speaker units 10,
the actual arrangement is actually measured and reflected in the sorting destination of the sound
signal.
That is, according to the speaker system 1, the user may arrange the plurality of speaker units 10
in any manner, and the user can arbitrarily arrange the plurality of speaker units 10.
[0056]
Next, a more specific second embodiment of the signal processing system and the speaker
system of the present invention will be described.
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[0057]
Also in this second embodiment, as in the above-described first embodiment, a plurality of signal
processing systems each including a plurality of processing devices each receiving a signal and
performing processing on the signal The speaker system provided with the speaker unit of
Further, in the second embodiment, as such a speaker system, as in the above-described
comparative example, a speaker system provided with two speaker units is illustrated to simplify
the description.
[0058]
FIG. 4 is a hierarchy diagram showing a second embodiment of the signal processing system and
the speaker system.
5 is a schematic view showing the speaker system shown in FIG.
6 is a block diagram showing the speaker system shown in FIG. 4 and FIG.
[0059]
The speaker system 100 shown in FIGS. 4 to 6 is a speaker system of a type in which the first
and second speaker units 110 and 120 face each other to the user and are arranged side by side.
A first speaker 111 is mounted on the first speaker unit 110, and a second speaker 121, which is
a speaker equivalent to the first speaker 111, is mounted on the second speaker unit 120.
[0060]
Here, as described in the description with reference to FIG. 1 above, also in the second
embodiment, the right side when the user is viewed from the speaker unit facing the user is
treated as the right side in the system, The left side at that time is treated as the left side in the
system.
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[0061]
Each of the first and second speaker units 110 and 120 in the second embodiment corresponds
to an example of a processing device that receives a signal and executes processing on the signal.
[0062]
Each of the first and second speaker units 110 and 120 also corresponds to an example of a
speaker unit equipped with a speaker that receives a sound signal representing a sound and
emits a sound represented by the sound signal.
[0063]
And in 2nd Embodiment, these two speaker units 110 and 120 serve as an example of a plurality
of processing devices, and an example of a plurality of speaker units.
That is, in the second embodiment,
two
is illustrated as an example of
plurality
.
[0064]
The speaker system 100 also includes a power supply 131 and first and second connection
cables 132 and 133.
[0065]
The power supply 131 supplies power to the speaker system 100.
Although not specified here, the power supply 131 includes a power supply cable for supplying a
commercial power supply, a DC power supply which houses a battery and supplies DC power
from the battery.
The power supply 131 is connected to the first speaker unit 110.
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[0066]
The first connection cable 132 is a cable for connecting to the speaker system 100 a sound
source device 150 for outputting a sound signal such as various drives for accessing a recording
medium in which music, a movie or the like is recorded, a television or the like.
The sound source device 150 is connected to the first speaker unit 110 via the first connection
cable 132. Here, with regard to the above-mentioned sound signal, two sound signals of the R
side sound signal and the L side sound signal are output from the sound source device 150. The
R side sound signal is a sound signal representing the sound to be emitted from the right
speaker, and the L side sound signal is a sound signal representing the sound to be emitted from
the left speaker. Then, both the R side sound signal and the L side sound signal are input to the
first speaker unit 110 from the sound source device 150 via the first connection cable 132.
[0067]
The second connection cable 133 connects the first speaker unit 110 and the second speaker
unit 120 to each other.
[0068]
The first speaker unit 110 includes, in addition to the first speaker 111, an amplifier unit 112, a
radio wave reception substrate 113, an output channel switching control unit 114, and a power
supply unit 115.
[0069]
In addition to the second speaker 121, the second speaker unit 120 also includes a radio wave
transmission substrate 122.
[0070]
The amplifier unit 112 receives, from the output channel switching control unit 114, a sound
signal (first sound signal) for the first speaker 111 and a sound signal (second sound signal) for
the second speaker 121, as described later. Is input.
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The amplifier unit 112 amplifies the two sound signals.
Then, the amplifier unit 112 inputs the amplified first sound signal to the first speaker 111, and
inputs the amplified second sound signal to the second speaker 121 via the second connection
cable 133.
[0071]
The radio wave reception board 113 is provided with two radio wave receivers 113a and 113b.
The radio wave reception substrate 113 is mounted in a housing 110 a of the first speaker unit
110 as schematically shown in FIG. 5. The mounting location of the radio wave reception
substrate 113 is substantially at the center of the bottom plate of the housing 110 a of the first
speaker unit 110. Further, the radio wave reception substrate 113 is mounted in a direction in
which the two radio wave receivers 113a and 113b are aligned in the left and right direction.
[0072]
Here, the radio wave transmission substrate 122 of the second speaker unit 120 includes one
radio wave transmitter 122a. The radio wave transmission substrate 122 is, as schematically
shown in FIG. 5, in the housing 120a so that the radio wave transmitter 122a is located
substantially at the center of the bottom plate of the housing 120a of the second speaker unit
120. It is mounted.
[0073]
In the second embodiment, the following exchange of radio signal is performed between the two
radio wave receivers 113a and 113b of the first speaker unit 110 and the radio wave transmitter
122a of the second speaker unit 120.
[0074]
FIG. 7 is a view schematically showing exchange of radio wave signals between the two radio
wave receivers of the first speaker unit and the radio wave transmitter of the second speaker
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unit.
[0075]
In the radio wave transmission substrate 122 of the second speaker unit 120, when power is
supplied from the power supply unit 115 of the first speaker unit 110, the radio wave
transmitter 122a transmits a radio wave signal of a predetermined intensity for a predetermined
time from the supply time point. Do.
The radio wave transmitter 122a is a nondirectional transmitter, and a radio wave signal is
transmitted from the radio wave transmitter 122a in all directions.
The signal strength of the radio wave signal decreases as the distance from the radio wave
transmitter 122 a increases. That is, this radio wave signal is a signal carrying distance
information indicating the distance from the radio wave transmitter 122a as the signal strength.
Then, the radio wave signal is received by the two radio wave receivers 113 a and 113 b
provided in the radio wave reception substrate 113 of the first speaker unit 110.
[0076]
The radio wave transmitter 122a in the second embodiment corresponds to an example of a
transmitter that emits a wireless signal. Further, each of the two radio wave receivers 113a and
113b in the second embodiment corresponds to an example of a detector that detects a wireless
signal generated by the transmitter. In the second embodiment, radio wave signals transmitted
by the radio wave transmitter 122a and received by the two radio wave receivers 113a and 113b
correspond to an example of a wireless signal.
[0077]
Here, as described above, the radio wave reception substrate 113 is mounted in the housing 110
a such that the two radio wave receivers 113 a and 113 b are aligned left and right.
[0078]
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In the example of FIG. 7, the second speaker unit 120 is disposed on the left side of the first
speaker unit 110 toward the user.
That is, the radio wave transmitter 122a of the second speaker unit 120 is positioned in the left
direction when viewed from the two radio wave receivers 113a and 113b aligned in the left and
right in the first speaker unit 110. As a result, the distance between the radio wave receiver 113a
on the right side and the radio wave transmitter 122a is longer than the distance between the
radio wave receiver 113b on the left side and the radio wave transmitter 122a. As described
above, the radio wave signal is a signal carrying, as the signal strength, distance information
indicating the distance from the radio wave transmitter 122a, the signal strength of which
decreases with distance from the radio wave transmitter 122a. Therefore, in the example of FIG.
7, the reception strength of the radio wave signal at the radio wave receiver 113a on the right
side toward the user is smaller than the reception strength at the radio wave receiver 113b on
the left side toward the user.
[0079]
Contrary to the example of FIG. 7, it is assumed that the second speaker unit 120 is disposed on
the right side of the first speaker unit 110 toward the user. That is, the case where the radio
wave transmitter 122a is positioned to the right as viewed from the two radio wave receivers
113a and 113b will be considered. In this case, the distance between the right radio wave
receiver 113a and the radio wave transmitter 122a is shorter than the distance between the left
radio wave receiver 113b and the radio wave transmitter 122a. Therefore, in this example, the
reception strength of the radio wave signal at the radio wave receiver 113a on the right side
toward the user is larger than the reception strength of the radio wave signal at the radio wave
receiver 113b on the left side toward the user.
[0080]
In the output channel switching control unit 114 shown in FIGS. 4 to 6, the R side sound signal
and the L side sound signal are respectively two speakers using the reception intensity of the
radio signal at the two radio wave receivers 113a and 113b. It is sorted as a signal directed to
any of 111, 121. The sorting of the sound signals will be described in detail later.
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[0081]
FIG. 8 is a block diagram showing details of the output channel switching control unit shown in
FIGS.
[0082]
As shown in FIG. 8, the output channel switching control unit 114 includes a sound signal input
unit 114a, a positional relationship determination unit 114b, and a switch 114c.
[0083]
The sound signal input unit 114a receives the R side sound signal and the L side sound signal
from the sound source device 150, and sends the input sound signal to the changeover switch
114c.
[0084]
The positional relationship determination unit 114b determines the relative positional
relationship between the two speaker units 110 and 120 as follows using the reception strengths
of the radio wave signals at the two radio wave receivers 113a and 113b. .
[0085]
The positional relationship determination unit 114b compares the received signal strengths of
the two radio wave receivers 113a and 113b with each other.
[0086]
Here, as described above, when the radio wave transmitter 122a is positioned in the left direction
as viewed from the two radio wave receivers 113a and 113b, the reception intensity on the right
side is smaller than the reception intensity on the left side .
That is, in the arrangement where the first speaker unit 110 is positioned on the right side
toward the user and the second speaker unit 120 is positioned on the left side toward the user,
the reception intensity on the right side is smaller than the reception intensity on the left side.
[0087]
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Conversely, when the radio wave transmitter 122a is positioned in the right direction as viewed
from the two radio wave receivers 113a and 113b, the reception strength on the right side is
larger than the reception strength on the left side.
That is, in the arrangement where the first speaker unit 110 is positioned on the left side toward
the user and the second speaker unit 120 is positioned on the right side toward the user, the
reception intensity on the right side is larger than the reception intensity on the left side.
[0088]
In the second embodiment, a table (not shown) is a table in which the above-described two types
of magnitude relationships of reception strength and the above-described two types of relative
positional relationships between speaker units are associated in a one-to-one manner. Is stored in
In this table, the positional relationship that the first speaker unit 110 is on the right side and the
second speaker unit 120 is on the left side is associated with the magnitude relationship that the
reception intensity on the right side is smaller than the reception intensity on the left side.
Further, a positional relationship in which the first speaker unit 110 is on the left side and the
second speaker unit 120 is on the right side is associated with the magnitude relationship that
the reception intensity on the right side is larger than the reception intensity on the left side.
[0089]
The positional relationship determination unit 114b determines the relative positional
relationship between units by searching the above-described table based on the magnitude
relationship obtained by comparing the magnitudes of the reception strengths.
Then, based on the determined positional relationship, the positional relationship determination
unit 114 b generates a switch control signal for switching two later-described switches in the
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changeover switch 114 c. The positional relationship determination unit 114b sends the
generated switch control signal to the changeover switch 114c. The positional relationship
determination unit 114b in the second embodiment corresponds to an example of the
arrangement determination unit that determines the arrangement of the plurality of processing
devices based on the detection of the wireless signal by the detector. The positional relationship
determination unit 114 b also corresponds to an example of a placement determination unit that
determines the placement of the plurality of speaker units based on the detection of the wireless
signal by the detector.
[0090]
In the changeover switch 114c, two switches described later are switched according to the switch
control signal from the positional relationship determination unit 114b, so that each of the R side
sound signal and the L side sound signal is a signal for the left and right speaker units. Sort out.
[0091]
The changeover switch 114c has two input terminals, an input terminal 114c̲R for the R side
sound signal and an input terminal 114c̲L for the L side sound signal.
The two input terminals 114c̲R and 114c̲L are connected to the sound signal input unit 114a.
[0092]
Furthermore, the changeover switch 114c outputs two outputs of an output terminal 114c̲1 of a
signal (first sound signal) for the first speaker unit 110 and an output terminal 114c̲2 of a
signal (second sound signal) for the second speaker unit 120. It has a terminal. The two output
terminals 114c̲1 and 114c̲2 are connected to the amplifier unit 1112.
[0093]
The changeover switch 114c has the following two switches.
[0094]
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One switch is an R-side switch 114c̲sR switchably connecting the input terminal 114c̲R of the
R side sound signal to the output terminal 114c̲1 of the first sound signal and the output
terminal 114c̲2 of the second sound signal.
The other switch is an L-side switch 114c̲sL switchably connecting the input terminal 114c̲L of
the L-side sound signal to the output terminal 114c̲1 of the first sound signal and the output
terminal 114c̲2 of the second sound signal.
[0095]
The switch control signal generated by the positional relationship determination unit 114b and
sent to the changeover switch 114c is the following signal based on the positional relationship
determined by the positional relationship determination unit 114b.
[0096]
The switch control signal based on the positional relationship that the first speaker unit 110 is
on the left side and the second speaker unit 120 is on the right side is the following signal.
That is, this signal is a signal that connects the R-side switch 114c̲sR to the second sound signal
output terminal 114c̲2 and connects the L-side switch 114c̲sL to the first sound signal output
terminal 114c̲1.
[0097]
The switch control signal based on the positional relationship that the first speaker unit 110 is
on the right side and the second speaker unit 120 is on the left side is the following signal. That
is, this signal is a signal that connects the R-side switch 114c̲sR to the output terminal 114c̲1
of the first sound signal and connects the L-side switch 114c̲sL to the output terminal 114c̲2
of the second sound signal.
[0098]
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23
In the changeover switch 114c, the R-side switch 114c̲sR and the L-side switch 114c̲sL are
switched by the above-described switch control signal. As a result, each of the R side sound signal
and the L side sound signal is sorted as a signal for each of the left and right speaker units.
[0099]
In the example of FIG. 8, based on the example of FIG. 7, the R side sound signal is sorted as a
signal (first sound signal) for the first speaker unit 110 on the right side toward the user. Further,
the L-side sound signal is sorted as a signal (second sound signal) for the second speaker unit
120 on the left side toward the user.
[0100]
In the second embodiment, the combination of the positional relationship determination unit 114
b and the switch 114 c corresponds to an example of a signal sorting unit that sorts a plurality of
signals to each of a plurality of processing devices and transmits the plurality of signals. The
combination of the positional relationship determination unit 114b and the changeover switch
114c also corresponds to an example of a sound signal sorting unit that sorts a plurality of sound
signals to the speakers of the plurality of speaker units and transmits them.
[0101]
The first and second two sound signals, which the changeover switch 114 c sorts into the first
and second two speaker units 110 and 120, are sent to the amplifier unit 112.
[0102]
Then, as shown in FIG. 6, the amplifier unit 112 amplifies these two sound signals, and inputs the
first sound signal to the first speaker 111.
The amplifier unit 112 also inputs the amplified second sound signal to the second speaker 121
of the second speaker unit 120 via the second connection cable 133.
09-05-2019
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[0103]
Further, as shown in FIG. 6, the power supply unit 115 mounted on the first speaker unit 110
includes the components in the first speaker unit 110 described above and the radio wave
transmission substrate 122 in the second speaker unit 120. Supply power to When supplying
power, the power supply unit 115 converts the power input from the power supply 130 into, for
example, DC power of a size usable by each component when the power is commercial AC power.
, Performs power conversion processing not specified here. The power supply unit 115 supplies
power after such power conversion processing to each component. Also, the power supply from
the power supply unit 115 to the radio wave transmission substrate 122 in the second speaker
unit 120 is the same as the above-mentioned input of the second sound signal to the second
speaker 121, and the second connection cable 133 is used. Through.
[0104]
The sound output processing in the speaker system 100 according to the second embodiment
described above with reference to FIGS. 4 to 8 will be described with reference to the flowchart
shown below, although it slightly overlaps with the above description.
[0105]
FIG. 9 is a flow chart showing the flow of sound output processing in the speaker system shown
in FIGS.
The sound output process shown by this flowchart is a process when the user listens to a sound
in the speaker system 100 of the second embodiment. In this sound output process, first, a power
switch (not shown) provided to the first speaker unit 110 is turned on by the user (step S101).
[0106]
When the power switch is turned on, power is supplied from the power supply unit 115 of the
first speaker unit 110 to each component of the first speaker unit 110 and the radio wave
transmission substrate 122 of the second speaker unit 120. Then, after the start of the power
supply, transmission and reception of the following radio signal is performed between the radio
09-05-2019
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wave receiving substrate 113 of the first speaker unit 110 and the radio wave transmitting
substrate 122 of the second speaker unit 120 for a predetermined time. (Step S102).
[0107]
In step S102, the radio wave transmitter 122a included in the radio wave transmission substrate
122 of the second speaker unit 120 transmits a radio wave signal of a predetermined intensity
for a predetermined time. Then, each of the two radio wave receivers 113a and 113b included in
the radio wave reception board 113 of the first speaker unit 110 receives the radio wave signal.
[0108]
Here, as described above, the radio wave signal emitted by the radio wave transmitter 122a of
the second speaker unit 120 decreases in signal strength as it gets farther from the radio wave
transmitter 122a. That is, this radio wave signal is a signal carrying distance information
indicating the distance from the radio wave transmitter 122a as the signal strength.
[0109]
Next, the positional relationship determination unit 114b of the first speaker unit 110
determines the reception intensity of each radio wave signal received by each radio wave
receiver 113a, 113b by the distance from the radio wave transmitter 122a to each radio wave
receiver 113a, 113b. Is read as distance information indicating (step S103).
[0110]
Then, the positional relationship determination unit 114b determines whether the reception
strength of the radio wave signal at the radio wave receiver 113a on the right side toward the
user is greater than the reception strength at the radio wave receiver 113b on the left side
toward the user. It is determined (step S104).
[0111]
When the reception strength on the right side is larger than the reception strength on the left
side (YES in step S104), the positional relationship determination unit 114b searches the above-
09-05-2019
26
described table based on the magnitude relationship.
As a result, as a relative positional relationship between the units, a positional relationship in
which the first speaker unit 110 is on the left side and the second speaker unit 120 is on the
right side can be obtained.
[0112]
The positional relationship determination unit 114 b generates the following switch control
signal based on the positional relationship.
The switch control signal is a signal that connects the R-side switch 114c̲sR shown in FIG. 8 to
the output terminal 114c̲2 of the second sound signal and connects the L-side switch 114c̲sL
to the output terminal 114c̲1 of the first sound signal. The positional relationship determination
unit 114b sends this switch control signal to the changeover switch 114c.
[0113]
By the switch control signal, the L-side switch 114c̲sL is connected to the output terminal
114c̲1 of the first sound signal (step S105), and the R-side switch 114c̲sR is connected to the
output terminal 114c̲2 of the second sound signal (step S106).
[0114]
By these processes, the L side sound signal is sorted as a sound signal (first sound signal) for the
first speaker unit 110, and the R side sound signal is generated as a sound signal for the second
speaker unit 120 (second sound signal) Preparation for sorting is complete.
[0115]
On the other hand, when the reception strength on the right side is smaller than the reception
strength on the left side (NO determination in step S104), the positional relationship
determination unit 114b searches the above-described table based on the magnitude
relationship.
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As a result, as a relative positional relationship between the units, a positional relationship in
which the first speaker unit 110 is on the right side and the second speaker unit 120 is on the
left side can be obtained.
[0116]
The positional relationship determination unit 114 b generates the following switch control
signal based on the positional relationship.
The switch control signal is a signal for connecting the R-side switch 114c̲sR shown in FIG. 8 to
the output terminal 114c̲1 of the first sound signal and connecting the L-side switch 114c̲sL to
the output terminal 114c̲2 of the second sound signal. The positional relationship determination
unit 114b sends this switch control signal to the changeover switch 114c.
[0117]
By this switch control signal, the L-side switch 114c̲sL is connected to the output terminal
114c̲2 of the second sound signal (step S107), and the R-side switch 114c̲sR is connected to
the output terminal 114c̲1 of the first sound signal (step S108).
[0118]
By these processes, the L side sound signal is sorted as a sound signal (second sound signal) for
the second speaker unit 120, and the R side sound signal is generated as a sound signal for the
first speaker unit 110 (first sound signal) Preparation for sorting is complete.
[0119]
When the preparation for sorting is completed in any of steps S105 and S106 or steps S107 and
S108, the output channel switching control unit 114 notifies that effect to the sound source
device 150 (step S109).
[0120]
Then, after the notification, the L side sound signal and the R side sound signal sent from the
sound source device 150 are appropriately sorted by the changeover switch 114 c which is
ready as described above, and amplified by the amplifier unit 112. Speakers 111 and 121 are
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input.
[0121]
The input of the sound signal to the speaker in step S109 is continued while the power switch
(not shown) of the first speaker unit 110 is on (NO determination in step S110).
Then, when the power switch (not shown) of the first speaker unit 110 is turned off by the user
(YES judgment in step S110), the sound output process shown in the flowchart of FIG. 9 ends.
[0122]
As described above, in the speaker system 100 according to the second embodiment, the R side
sound signal is sorted to the speakers of the speaker unit actually disposed on the right side, and
the speaker system 100 of the second embodiment is actually Side tone signals are sorted.
As a result, regardless of the arrangement of the two speaker units 110 and 120, the sound
represented by the R side sound signal always comes from the right side, and the sound
represented by the L side sound signal always from the left side.
[0123]
As described above, this speaker system 100 has an arbitrary degree of arrangement of the
speaker units such that a sound without a sense of discomfort is surely generated regardless of
the positional relationship between the two speaker units 110 and 120 by the user. It is a high
system.
[0124]
In the second embodiment, the reception intensity of the radio signal received by each of the two
radio wave receivers 113a and 113b is used to determine the relative positional relationship
between the two speaker units 110 and 120.
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29
In general, the signal strength of the radio signal emitted from the source decreases with
distance from the source.
That is, the radio wave signal is a signal carrying distance information indicating the distance
from the transmission source as the signal strength.
[0125]
In the second embodiment, this property of the radio signal is used to determine the relative
position of the radio transmitter 122a with respect to the two radio receivers 113a and 113b,
thereby ensuring the relative positional relationship between the units. It is to be determined.
[0126]
This means that the following application form is suitable for the present speaker system.
In this application form, each of the plurality of speaker units is mounted with at least one of the
transmitter and a set of detectors arranged at positions different from each other.
Moreover, in this application form, the detection strength of the wireless signal in each of the
plurality of detectors belonging to the detector set is used in the arrangement determination unit.
And this arrangement ¦ positioning judgment part judges arrangement ¦ positioning of said
several speaker unit by calculating ¦ requiring the relative position of the said transmitter with
respect to the said detector group.
[0127]
The two speaker units 110 and 120 in the second embodiment correspond to an example of a
plurality of speaker units in this application mode. The set of two radio wave receivers 113a and
113b in the second embodiment corresponds to an example of a set of detectors in this
application mode. Further, the positional relationship determination unit 114b in the second
embodiment also corresponds to an example of the arrangement determination unit in this
application mode.
09-05-2019
30
[0128]
In the second embodiment, the positional relationship determination unit 114b transmits radio
waves to the positions of the two radio wave receivers 113a and 113b based on the comparison
result of the reception strengths of the two radio wave receivers 113a and 113b. The relative
position of the device 122a is determined. In the second embodiment, the relative position is
determined by such a very simple process of comparing the reception intensity.
[0129]
This means that the following application form is more preferable in the application form in
which the arrangement of the speaker unit is determined using the detection intensity of each of
the plurality of detectors.
[0130]
In this application form, the arrangement determination unit obtains the relative position of the
transmitter with respect to the set of detectors based on the magnitude comparison of the
detection intensity of the wireless signal in each of the plurality of detectors.
[0131]
The positional relationship determination unit 114b in the second embodiment also corresponds
to an example of the arrangement determination unit in this application mode.
[0132]
Next, a third embodiment of the signal processing system and the speaker system of the present
invention will be described.
[0133]
The third embodiment is different from the second embodiment in the method of measuring the
arrangement of the speaker units.
09-05-2019
31
In the following, the third embodiment will be described focusing on this difference.
[0134]
In the third embodiment, as in the first embodiment described above, one embodiment of the
signal processing system includes a plurality of processing devices each of which receives a
signal and executes processing on the signal. , A speaker system provided with a plurality of
speaker units is illustrated.
Also in this third embodiment, as in the above-described comparative example and the second
embodiment, a speaker system provided with two speaker units 210 and 220 is illustrated to
simplify the description.
[0135]
FIG. 10 is a hierarchy diagram showing a third embodiment of the signal processing system and
the speaker system.
FIG. 11 is a schematic view showing the speaker system shown in FIG.
FIG. 12 is a block diagram showing the speaker system shown in FIG. 10 and FIG.
[0136]
In FIGS. 10 to 12, constituent elements equivalent to the constituent elements shown in FIGS. 4
to 6 are denoted by the same reference numerals as those in FIGS. 4 to 6. Duplicate descriptions
will be omitted.
[0137]
The speaker system 200 shown in FIGS. 10 to 12 is also a speaker system of a type in which the
first and second speaker units 210 and 220 are arranged side by side similarly to the second
09-05-2019
32
embodiment.
A first speaker 111 is mounted on the first speaker unit 210, and a second speaker 121 is
mounted on the second speaker unit 220.
[0138]
Here, as described in the above description with reference to FIG. 1, also in the third
embodiment, the right side when the user is viewed from the speaker unit facing the user is
treated as the right side in the system, The left side at that time is treated as the left side in the
system.
[0139]
Each of the first and second two speaker units 210 and 220 in the third embodiment also
corresponds to an example of a processing device that receives a signal and executes processing
on the signal.
[0140]
Each of the first and second speaker units 210 and 220 also corresponds to an example of a
speaker unit equipped with a speaker that receives a sound signal representing a sound and
emits a sound represented by the sound signal.
Furthermore, in the third embodiment, as in the above-described second embodiment, two is
illustrated as an example of plurality as to the number of processing devices and speaker
units.
[0141]
In the third embodiment, the second speaker unit 210 includes a test sound output unit 221 that
generates a sound signal representing a test sound to be described later and inputs the sound
signal to the second speaker 121.
09-05-2019
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Power is supplied from the power supply unit 115 to the test sound output unit 221 via the
second connection cable 231 that connects the two speaker units 210 and 220 to each other.
[0142]
Furthermore, in the third embodiment, the first speaker unit 210 includes the test sound
detection substrate 211 that detects the test sound emitted by the second speaker 121. Then, the
output channel switching control unit 212 according to the third embodiment sorts the two
sound signals into the two speakers 111 and 121 based on the detection result of the test sound
detection board 211. The sorted sound signals are amplified by the amplifier unit 112 and
directly input to the first speaker 111, and are input to the second speaker 121 via the second
connection cable 231.
[0143]
The test sound detection board 211 is provided with two microphones 211a and 211b. The test
sound detection board 211 is mounted in a housing 210a of the first speaker unit 210, as
schematically shown in FIG. The mounting location of the test sound detection substrate 211 is
substantially at the center of the bottom plate of the housing 210 a of the first speaker unit 210.
Further, the test sound detection board 211 is mounted in the direction in which the two
microphones 211 a and 211 b are aligned in the left and right direction.
[0144]
In the third embodiment, the test sound generated by the second speaker 121 mounted on the
housing 220 a of the second speaker unit 220 is detected by the two microphones 211 a and
211 b of the first speaker unit 210 as follows. Be done.
[0145]
FIG. 13 is a view schematically showing how a test sound generated by the second speaker of the
second speaker unit is detected by the two microphones of the first speaker unit.
[0146]
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34
When the power is supplied from the power supply unit 115 of the first speaker unit 210, the
test sound output unit 221 of the second speaker unit 220 generates a sound signal representing
a test sound of a predetermined volume for a predetermined time from the supply time point.
And input to the second speaker 121.
As a result, this second speaker 121 emits a test sound of a predetermined volume for a
predetermined time from the supply time point.
The volume of the test sound emitted from the second speaker 121 decreases as the distance
from the second speaker 121 increases. That is, this test sound is a signal carrying distance
information indicating the distance from the second speaker 121 as a volume. Then, this test
sound is detected by the two microphones 211 a and 211 b provided in the test sound detection
substrate 211 of the first speaker unit 210.
[0147]
In the third embodiment, the second speaker 121 corresponds to an example of a transmitter
that emits a wireless signal. In the third embodiment, each of the two microphones 211a and
211b corresponds to an example of a detector that detects a wireless signal generated by the
transmitter. In the third embodiment, the test sound emitted from the second speaker 121 and
detected by the two microphones 211a and 211b corresponds to an example of the wireless
signal.
[0148]
Here, as described above, the test sound detection substrate 211 is mounted in the housing 210
a such that the two microphones 211 a and 211 b are aligned in the left and right direction.
[0149]
In the example of FIG. 13, the second speaker unit 220 is disposed on the left side of the first
speaker unit 210 toward the user.
That is, the second speaker 121 of the second speaker unit 220 is located in the left direction
09-05-2019
35
when viewed from the two microphones 211 a and 211 b aligned in the left and right in the first
speaker unit 210. As a result, the distance between the right microphone 211 a and the second
speaker 121 is longer than the distance between the left microphone 211 b and the second
speaker 121.
[0150]
As described above, the test sound is a signal that carries distance information indicating the
distance from the second speaker 121 as the sound volume, the volume of which decreases as
the distance from the second speaker 121 increases. Therefore, in the example of FIG. 13, the
detection intensity of the test sound at the microphone 211a on the right side toward the user is
smaller than the detection intensity at the microphone 211b on the left side toward the user.
[0151]
Contrary to the example of FIG. 13, it is assumed that the second speaker unit 220 is disposed on
the right side of the first speaker unit 210 toward the user. That is, the case where the second
speaker 121 is positioned in the right direction when viewed from the two microphones 211a
and 211b will be considered. In this case, the distance between the right microphone 211 a and
the second speaker 121 is shorter than the distance between the left microphone 211 b and the
second speaker 121.
[0152]
Therefore, in this example, the detection strength of the test sound at the microphone 211a on
the right side toward the user is higher than the detection strength at the microphone 211b on
the left side toward the user.
[0153]
In the output channel switching control unit 114 shown in FIGS. 10 to 12, the R side sound
signal and the L side sound signal are respectively divided into two speakers 111 and 111 using
detection strengths of test sounds by the two microphones 211 a and 211 b. It is sorted as a
signal directed to any of 121.
09-05-2019
36
The sorting of the sound signals will be described in detail later.
[0154]
FIG. 14 is a block diagram showing details of the output channel switching control unit shown in
FIGS. In FIG. 14, components equivalent to the components shown in FIG. 8 are assigned the
same reference numerals as the reference symbols in FIG. 8, and duplicate explanations of these
equivalent components will be omitted below.
[0155]
The positional relationship determination unit 212a shown in FIG. 14 determines the relative
positional relationship between the two speaker units 210 and 220 as follows, using the detected
strengths of the test sound with the two microphones 211a and 211b. It is a thing.
[0156]
The positional relationship determination unit 212a compares magnitudes of detection strengths
of the test sound with the two microphones 211a and 211b.
[0157]
Here, as described above, when the second speaker 121 is located in the left direction as viewed
from the two microphones 211a and 211b, the detection intensity on the right side is smaller
than the detection intensity on the left side.
That is, in the arrangement where the first speaker unit 210 is positioned on the right side
toward the user and the second speaker unit 220 is positioned on the left side toward the user,
the detection intensity on the right side is smaller than the detection intensity on the left side.
[0158]
Conversely, when the second speaker 121 is positioned in the right direction when viewed from
09-05-2019
37
the two microphones 211a and 211b, the detection intensity on the right side is larger than the
detection intensity on the left side.
That is, in the arrangement where the first speaker unit 210 is positioned on the left side toward
the user and the second speaker unit 220 is positioned on the right side toward the user, the
reception intensity on the right side is larger than the reception intensity on the left side.
[0159]
In the third embodiment, a table in which the above-described two types of magnitude
relationship between test sound detection strengths and the above-described two types of
relative positional relationships between speaker units are in a one-to-one correspondence is not
sufficient. It is stored in the illustrated memory.
[0160]
In this table, the positional relationship that the first speaker unit 210 is on the right side and the
second speaker unit 220 is on the left side is associated with the magnitude relationship that the
detection intensity on the right side is smaller than the detection intensity on the left side.
The positional relationship that the first speaker unit 210 is on the left side and the second
speaker unit 220 is on the right side is associated with the magnitude relationship that the
detection intensity on the right side is larger than the detection intensity on the left side.
[0161]
The positional relationship determination unit 212a determines the relative positional
relationship between the units by searching the above-described table according to the
magnitude relationship obtained by comparing the magnitudes of the detection intensities. Then,
based on the determined positional relationship, the positional relationship determination unit
212a generates a switch control signal similar to the switch control signal in the second
embodiment described above. The positional relationship determination unit 212a sends the
generated switch control signal to the changeover switch 114c. In the third embodiment, the
positional relationship determination unit 212a corresponds to an example of an arrangement
determination unit that determines the arrangement of a plurality of processing devices based on
09-05-2019
38
the detection of the wireless signal by the detector. The positional relationship determination unit
212a also corresponds to an example of an arrangement determination unit that determines the
arrangement of the plurality of speaker units based on the detection of the wireless signal by the
detector.
[0162]
In the changeover switch 114c that has received the switch control signal from the positional
relationship determination unit 212a, the R-side switch 114c̲sR and the L-side switch 114c̲sL
are switched by the switch control signal. As a result, each of the R side sound signal and the L
side sound signal is sorted as a signal for each of the left and right speaker units.
[0163]
In the third embodiment, the combination of the positional relationship determination unit 212a
and the changeover switch 114c corresponds to an example of a signal sorting unit that sorts a
plurality of signals to each of a plurality of processing devices and transmits. The combination of
the positional relationship determination unit 212a and the changeover switch 114c also
corresponds to an example of a sound signal sorting unit that sorts a plurality of sound signals to
the speakers of the plurality of speaker units and transmits them.
[0164]
In the example of FIG. 14, based on the example of FIG. 13, the R side sound signal is sorted as a
signal (first sound signal) for the first speaker unit 210 on the right side toward the user, and
sent to the amplifier unit 112. Be Also, the L side sound signal is sorted as a signal (second sound
signal) for the second speaker unit 220 on the left side toward the user, and is sent to the
amplifier unit 112.
[0165]
Then, as shown in FIG. 12, the amplifier unit 112 amplifies these two sound signals, and inputs
the first sound signal to the first speaker 111. In addition, the amplifier unit 112 inputs the
09-05-2019
39
amplified second sound signal to the second speaker 121 of the second speaker unit 220 via the
second connection cable 231.
[0166]
The sound output processing in the speaker system 200 of the third embodiment described
above with reference to FIGS. 10 to 14 will be described with reference to the flowchart shown
below, although it slightly overlaps with the above description.
[0167]
FIG. 15 is a flow chart showing a flow of sound output processing in the speaker system shown
in FIGS.
In FIG. 15, processes equivalent to the processes of the flowchart shown in FIG. 9 are assigned
the same step numbers as the step numbers in FIG. 9, and duplicate explanations of these
equivalent processes are omitted below.
[0168]
In the sound output process indicated by this flowchart, when the power switch (not shown) of
the first speaker unit 210 is turned on by the user in step S101, power is supplied from the
power supply unit 115 to each component. Then, after the start of the power supply, generation
and detection of the following test sound are performed for a predetermined time (step S201).
[0169]
In step S201, the test sound generation unit 221 of the second speaker unit 220 generates a
sound signal representing a test sound of a predetermined volume for a predetermined time, and
inputs the sound signal to the second speaker 121. As a result, the second speaker 121 emits a
test sound of a predetermined volume for a predetermined time from the supply time point. And
each of two microphones 211a and 211b with which the test sound detection board ¦ substrate
211 of the 1st speaker unit 210 is equipped detects the test sound.
09-05-2019
40
[0170]
Here, as described above, the volume of the test sound decreases with distance from the second
speaker 121. That is, this test sound is a signal carrying the distance information indicating the
distance from the second speaker 121 as the volume.
[0171]
Next, the positional relationship determination unit 212a reads the detection intensity of each
test sound detected by each of the microphones 211a and 211b as distance information
indicating the distance from the second speaker 121 to each of the microphones 211a and 211b
(step S202) .
[0172]
Then, the positional relationship determination unit 212a determines whether the detected
intensity of the test sound at the right microphone 211a toward the user is greater than the
detected intensity of the test sound at the left microphone 211b toward the user. (Step S203).
[0173]
When the detected intensity on the right side is larger than the detected intensity on the left side
(YES in step S203), the positional relationship determination unit 212a searches the abovedescribed table in the magnitude relationship.
As a result, as a relative positional relationship between the units, a positional relationship in
which the first speaker unit 210 is on the left side and the second speaker unit 220 is on the
right side can be obtained.
[0174]
The positional relationship determination unit 212a generates the following switch control signal
based on the positional relationship.
09-05-2019
41
The switch control signal is a signal that connects the R-side switch 114c̲sR shown in FIG. 14 to
the output terminal 114c̲2 of the second sound signal and connects the L-side switch 114c̲sL
to the output terminal 114c̲1 of the first sound signal. The positional relationship determination
unit 212a sends this switch control signal to the changeover switch 114c.
[0175]
Conversely, when the detected intensity on the right side is smaller than the detected intensity on
the left side (NO in step S203), the positional relationship determination unit 212a searches the
above-described table according to the magnitude relationship. As a result, as a relative
positional relationship between the units, a positional relationship in which the first speaker unit
210 is on the right side and the second speaker unit 220 is on the left side can be obtained.
[0176]
The positional relationship determination unit 212a generates the following switch control signal
based on the positional relationship. The switch control signal is a signal for connecting the Rside switch 114c̲sR shown in FIG. 14 to the output terminal 114c̲1 of the first sound signal and
connecting the L-side switch 114c̲sL to the output terminal 114c̲2 of the second sound signal.
The positional relationship determination unit 212a sends this switch control signal to the
changeover switch 114c.
[0177]
Then, in response to the switch control signal from the positional relationship determination unit
212a, preparation for sorting is performed by one of steps S105 and S106 or steps S107 and
S108. In step S109 after that, the output channel switching control unit 212 notifies the sound
source device 150 of the end of the preparation.
[0178]
Then, after the notification, the L side sound signal and the R side sound signal sent from the
sound source device 150 are appropriately sorted by the changeover switch 114 c which is
ready as described above, and amplified by the amplifier unit 112. Speakers 111 and 121 are
09-05-2019
42
input.
[0179]
The input of the sound signal to the speaker in step S109 is continued while the power switch
(not shown) of the first speaker unit 210 is turned on by the user (NO determination in step
S110).
Then, when the power switch is turned off (YES in step S110), the sound output process shown in
the flowchart of FIG. 15 ends.
[0180]
It goes without saying that the user can arrange the two speaker units 210 and 220 arbitrarily
by the speaker system 200 of the third embodiment described above.
[0181]
In the third embodiment, a test sound emitted from the second speaker 121 is used as a wireless
signal for obtaining the arrangement of the two speaker units 210 and 220.
As a result, in the third embodiment, the second speaker 121 doubles as the transmitter of the
wireless signal, thereby reducing the number of parts.
[0182]
This means that the following application is more preferable in the above application where the
arrangement of the speaker unit is determined using the detection intensity of each of the two
detectors. In this application form, the speaker mounted on the speaker unit doubles as the
transmitter, and emits a sound as the wireless signal. And in this application form, each of a
plurality of above-mentioned detectors is a microphone which detects sound.
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[0183]
The second speaker 121 in the third embodiment also corresponds to an example of a
transmitter in this application mode. Also, each of the two microphones 211a and 211b in the
third embodiment corresponds to an example of a detector in this application mode.
[0184]
In addition, the two speaker units 210 and 220 in the third embodiment correspond to an
example of a plurality of speaker units in the above-mentioned application form for determining
the arrangement of the speaker units using the detection intensities of the respective detectors.
There is. The set of two microphones 211a and 211b in the third embodiment corresponds to an
example of a detector set in this application mode. Further, the positional relationship
determination unit 212a in the third embodiment also corresponds to an example of the
arrangement determination unit in this application mode.
[0185]
In the second and third embodiments described so far, the arrangement is determined based on
the magnitude comparison of detection intensities as a method of determining the arrangement
of a plurality of speaker units using the detection intensities of a plurality of detectors. I
illustrated the method to judge. However, the method of determining the arrangement of the
plurality of speaker units using the detection intensities of the plurality of detectors is not limited
to the method based on the comparison of magnitudes. This method is a method of determining
the arrangement of a plurality of speaker units by, for example, determining the relative position
of the transmitter with respect to the two detectors by so-called triangulation using detected
intensities of the two detectors. Also good.
[0186]
Next, a fourth embodiment of the present speaker system will be described.
[0187]
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The fourth embodiment is different from the second and third embodiments in the method of
measuring the arrangement of the speaker units.
Hereinafter, the fourth embodiment will be described focusing on this difference.
[0188]
In the fourth embodiment as well, as in the first to third embodiments described above, one of
the signal processing systems provided with a plurality of processing devices each of which
receives a signal and executes processing on the signal As an embodiment, a speaker system
provided with a plurality of speaker units is illustrated. Also in the fourth embodiment, as in the
above-described comparative example, the second embodiment, and the third embodiment, a
speaker system including two speaker units is illustrated to simplify the description.
[0189]
FIG. 16 is a hierarchy diagram showing a fourth embodiment of the signal processing system and
the speaker system. FIG. 17 is a schematic view showing the speaker system shown in FIG. FIG.
18 is a block diagram showing the speaker system shown in FIG. 16 and FIG.
[0190]
16-18, components equivalent to the components shown in FIGS. 4 to 6 above are given the
same reference numerals as the symbols in FIGS. 4 to 6, and in the following, these equivalent
components will be described. Duplicate descriptions will be omitted.
[0191]
The speaker system 300 shown in FIGS. 16 to 18 is also a speaker system of a type in which first
and second speaker units are arranged side by side similarly to the second embodiment.
The first speaker 111 is mounted on the first speaker unit 310, and the second speaker 121 is
mounted on the second speaker unit 320.
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[0192]
Here, as described in the description with reference to FIG. 1 above, also in the fourth
embodiment, the right side when the user is viewed from the speaker unit facing the user is
treated as the right side in the system, The left side at that time is treated as the left side in the
system.
[0193]
Each of the first and second two speaker units in the fourth embodiment also corresponds to an
example of a processing device that receives a signal and executes processing on the signal.
[0194]
Each of the first and second speaker units also corresponds to an example of a speaker unit
equipped with a speaker that receives a sound signal representing a sound and emits a sound
represented by the sound signal.
Further, also in the fourth embodiment, as in the above-described second embodiment and third
embodiment, two is illustrated as an example of plurality as to the number of processing
apparatuses and speaker units.
[0195]
In the fourth embodiment, the second speaker unit 320 includes a wireless tag mounting
substrate 321 on which a wireless tag 321a for transmitting a directional radio wave signal is
mounted.
In addition, the first speaker unit 310 includes the wireless receiver mounting substrate 311 on
which the wireless receiver 311 a for receiving the above-described directional radio signal is
mounted.
[0196]
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Here, power is supplied to the wireless receiver 311 a from the power supply unit 115 in the
first speaker unit 310. On the other hand, although a request signal for requesting transmission
of a directional radio signal is transmitted from the wireless receiver 311a to the wireless tag
321a, power required for transmission of the directional radio signal is supplied on the request
signal. .
[0197]
In the fourth embodiment, the wireless tag 321a corresponds to an example of a transmitter that
emits a wireless signal. In the fourth embodiment, the wireless receiver 311a corresponds to an
example of a detector that detects a wireless signal emitted by the transmitter. In the fourth
embodiment, the above-described directional radio signal corresponds to an example of a
wireless signal.
[0198]
In the fourth embodiment, the arrangement of the two speaker units 310 and 320 is determined
by the following operation of the wireless tag 321a of the second speaker unit 320 and the
wireless receiver 311a of the first speaker unit 310.
[0199]
FIG. 19 is a diagram schematically illustrating the operation of the wireless tag of the second
speaker unit and the wireless receiver of the first speaker unit.
[0200]
As schematically shown in FIG. 17 and FIG. 19, the wireless receiver mounting substrate 311 is
placed such that the wireless receiver 311 a is positioned approximately at the center of the
bottom plate of the housing 310 a of the first speaker unit 310. It is mounted in 310a.
The wireless tag mounting substrate 321 is mounted in the housing 320 a so that the wireless
tag 321 a is positioned substantially at the center of the bottom plate of the housing 320 a of the
second speaker unit 320.
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Further, in the fourth embodiment, the wireless tag mounting substrate 321 is mounted in the
housing 320 a so that the directivity of the directional radio wave signal S1 is directed to the
right of the user of the second speaker unit 320. There is.
[0201]
In the example of FIG. 19, the second speaker unit 320 is disposed on the left side of the first
speaker unit 310 toward the user. That is, the wireless tag 321 a of the second speaker unit 320
is located in the left direction as viewed from the wireless receiver 311 a of the first speaker unit
310. As a result, the directional radio wave signal S1 transmitted by the wireless tag 321a travels
toward the wireless receiver 311a, and is thus received by the wireless receiver 311a without
any problem.
[0202]
Contrary to the example of FIG. 19, it is assumed that the second speaker unit 320 is disposed on
the left side of the first speaker unit 310 toward the user. That is, the case where the wireless tag
321a is positioned in the right direction as viewed from the wireless receiver 311a will be
considered. In this case, the directional radio wave signal S1 transmitted by the wireless tag 321a
travels in the direction opposite to the direction toward the wireless receiver 311a. Therefore,
the directional radio signal S1 is not received by the wireless receiver 311a.
[0203]
In the output channel switching control unit 312 shown in FIGS. 16-18, the R side sound signal
and the L side sound signal are respectively two speakers 111 based on whether or not the
directional radio signal is received by the wireless receiver 311a. , 121 is sorted as a signal
directed to one of them. The sorting of the sound signals will be described in detail later.
[0204]
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FIG. 20 is a block diagram showing details of the output channel switching control unit shown in
FIGS. In FIG. 20, constituent elements equivalent to the constituent elements shown in FIG. 8 are
denoted by the same reference numerals as those in FIG. 8, and duplicate explanations of these
equivalent constituent elements are omitted below.
[0205]
The positional relationship determination unit 312a shown in FIG. 20 determines the relative
positional relationship between the two speaker units 310 and 320 as follows based on whether
or not the directional radio signal is received by the wireless receiver 311a. It is
[0206]
As described with reference to FIG. 19, when the wireless tag 321a is disposed in the left
direction as viewed from the wireless receiver 311a, the directional radio signal is received by
the wireless receiver 311a.
Conversely, when the wireless tag 321a is disposed in the right direction as viewed from the
wireless receiver 311a, no directional radio signal is received by the wireless receiver 311a.
[0207]
In the fourth embodiment, a table in which the states of the presence or absence of signal
reception in the wireless receiver 311a and the above-described two types of relative positional
relationships between the speaker units are associated with each other in a one-to-one manner is
not shown. It is stored in memory.
[0208]
In this table, the positional relationship that the first speaker unit 310 is on the right side and the
second speaker unit 320 is on the left side is associated with the reception state that signal
detection is performed in the wireless receiver 311 a.
In addition, a positional relationship in which the first speaker unit 310 is on the left side and the
second speaker unit 320 is on the right side is associated with the reception state that there is no
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signal detection in the wireless receiver 311 a.
[0209]
The positional relationship determination unit 312a determines the relative positional
relationship between units by searching the above-described table in the reception state of the
wireless receiver 311a at a predetermined timing. Then, based on the determined positional
relationship, the positional relationship determination unit 312a generates a switch control
signal similar to the switch control signal in the second embodiment described above. The
positional relationship determination unit 312a sends the generated switch control signal to the
changeover switch 114c. In the fourth embodiment, the positional relationship determination
unit 312a corresponds to an example of an arrangement determination unit that determines the
arrangement of a plurality of processing devices based on the detection of the wireless signal by
the detector. The positional relationship determination unit 312a also corresponds to an example
of an arrangement determination unit that determines the arrangement of a plurality of speaker
units based on the detection of the wireless signal by the detector.
[0210]
In the changeover switch 114c that has received the switch control signal from the positional
relationship determination unit 312a, the R-side switch 114c̲sR and the L-side switch 114c̲sL
are switched by the switch control signal. As a result, each of the R side sound signal and the L
side sound signal is sorted as a signal for each of the left and right speaker units.
[0211]
In the fourth embodiment, the combination of the positional relationship determination unit
312a and the changeover switch 114c corresponds to an example of a signal sorting unit that
sorts a plurality of signals to each of a plurality of processing devices and transmits. The
combination of the positional relationship determination unit 312a and the changeover switch
114c also corresponds to an example of a sound signal sorting unit that sorts a plurality of sound
signals to the speakers of a plurality of speaker units and transmits them.
[0212]
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In the example of FIG. 20, based on the example of FIG. 19, the R side sound signal is sorted as a
signal (first sound signal) for the first speaker unit 310 on the right side toward the user, and
sent to the amplifier unit 112. Be Further, the L side sound signal is sorted as a signal (second
sound signal) for the second speaker unit 320 on the left side toward the user, and is sent to the
amplifier unit 112.
[0213]
Then, as shown in FIG. 18, the amplifier unit 112 amplifies these two sound signals, and inputs
the first sound signal to the first speaker 111. In addition, the amplifier unit 112 inputs the
amplified second sound signal to the second speaker 121 of the second speaker unit 320 via the
second connection cable 231.
[0214]
The sound output processing in the speaker system 300 according to the fourth embodiment
described above with reference to FIGS. 16 to 20 will be described with reference to the
flowchart shown below, although it slightly overlaps with the above description.
[0215]
FIG. 21 is a flow chart showing a flow of sound output processing in the speaker system shown
in FIGS.
In FIG. 21, processes equivalent to the processes in the flowchart shown in FIG. 9 have the same
step numbers as those in FIG. 9, and hereinafter, the explanation of these equivalent processes is
omitted.
[0216]
In the sound output process indicated by this flowchart, when the power switch (not shown) of
the first speaker unit 110 is turned on by the user in step S101, power is supplied from the
power supply unit 115 to each component.
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[0217]
Then, after the start of the power supply, a request signal for requesting transmission of the
directional radio wave signal is transmitted from the wireless receiver 311a to the wireless tag
321a with power for operating the wireless tag 321a.
Then, in response to the request signal, the wireless tag 321a transmits a directional radio signal
using the power supplied on the request signal (step S201). On the other hand, after transmitting
the request signal, the wireless receiver 311a stands by to wait for the directional radio signal to
be sent (step S202).
[0218]
Next, the positional relationship determination unit 312a determines whether a directional radio
signal has been received by the wireless receiver 311a within a predetermined time (step S203).
[0219]
When the directional radio signal is not received by the wireless receiver 311a (NO
determination in step S203), the positional relationship determination unit 312a searches the
above table in a reception state in which there is no reception by the directional radio signal.
As a result, as a relative positional relationship between the units, a positional relationship in
which the first speaker unit 310 is on the left side and the second speaker unit 320 is on the
right side can be obtained.
[0220]
The positional relationship determination unit 312a generates the following switch control signal
based on the positional relationship. The switch control signal is a signal that connects the R-side
switch 114c̲sR shown in FIG. 20 to the output terminal 114c̲2 of the second sound signal and
connects the L-side switch 114c̲sL to the output terminal 114c̲1 of the first sound signal. The
positional relationship determination unit 312a sends this switch control signal to the
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changeover switch 114c.
[0221]
Conversely, when the directional radio signal is received by the wireless receiver 311a (YES in
step S203), the positional relationship determination unit 312a searches the above table in the
reception state that there is reception by the directional radio signal. . As a result, as a relative
positional relationship between the units, a positional relationship in which the first speaker unit
310 is on the right side and the second speaker unit 320 is on the left side can be obtained.
[0222]
The positional relationship determination unit 312a generates the following switch control signal
based on the positional relationship. This switch control signal is a signal for connecting the Rside switch 114c̲sR shown in FIG. 20 to the output terminal 114c̲1 of the first sound signal and
connecting the L-side switch 114c̲sL to the output terminal 114c̲2 of the second sound signal.
The positional relationship determination unit 312a sends this switch control signal to the
changeover switch 114c.
[0223]
Then, in response to the switch control signal from the positional relationship determination unit
312a, preparation for sorting is performed by one of steps S105 and S106 or steps S107 and
S108. In step S109 after that, the output channel switching control unit 312 notifies the sound
source device 150 of the end of the preparation.
[0224]
Then, after the notification, the L side sound signal and the R side sound signal sent from the
sound source device 150 are appropriately sorted by the changeover switch 114 c which is
ready as described above, and amplified by the amplifier unit 112. Speakers 111 and 121 are
input.
[0225]
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The input of the sound signal to the speaker in step S109 is continued while the power switch
(not shown) of the first speaker unit 310 is turned on by the user (NO determination in step
S110).
When the power switch is turned off (YES in step S110), the sound output process shown in the
flowchart of FIG. 21 ends.
[0226]
It goes without saying that the user can arrange the two speaker units 310 and 320 arbitrarily
according to the speaker system 300 of the fourth embodiment described above.
[0227]
In the fourth embodiment, a directional radio wave signal emitted from the wireless tag 321 a of
the second speaker unit 320 is used as a wireless signal for determining the arrangement of the
two speaker units 310 and 320.
As a result, in the fourth embodiment, the arrangement of the two speaker units 310 and 320
can be obtained by a very simple determination whether or not a directional radio signal is
received by the wireless receiver 311 a of the first speaker unit 310. it can.
[0228]
This means that the following application form is suitable for the present speaker system. In this
application form, the transmitter emits a directional signal as the wireless signal. Further, in this
application form, the detector detects the signal having directivity. Moreover, in this application
form, the arrangement determination unit obtains the relative position of the transmitter with
respect to the position of the detector based on the presence or absence of signal detection in the
detector. Then, the arrangement determining unit determines the arrangement of the plurality of
speaker units by obtaining the relative position of the transmitter.
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[0229]
The wireless tag 321a in the fourth embodiment also corresponds to an example of a transmitter
in this application mode. The wireless receiver 311a in the fourth embodiment also corresponds
to an example of a detector in this application mode.
[0230]
In the first to fourth embodiments described above, a speaker system having a plurality of
speaker units is illustrated as a specific embodiment of the signal processing system of the
present subject, but the signal processing system of the present subject is not limited thereto. It
is not limited. The signal processing system of the present invention may be, for example, an
image display system provided with a plurality of display devices, or a computer system provided
with a plurality of computer devices.
[0231]
Further, in the second to fourth embodiments described above, as specific embodiments of the
signal processing system and the speaker system of the present subject matter, a signal including
two processing devices (speaker units) for simplification of the description. The processing
system (speaker system) is illustrated. However, the present signal processing system and
speaker system are not limited to this. The signal processing system and the speaker system of
the present invention may include three or more processing units (speaker units). In this case,
the disposition of the processing device (speaker unit) is determined by, for example, a method
using triangulation as follows. In this method, a set of two detectors is mounted on any
processing device (speaker unit). In addition, a transmitter of a wireless signal is mounted on
another processing device (speaker unit). Then, two detectors detect the wireless signal from the
transmitter, and triangulation is performed using the detection results of each detector. Thereby,
the relative position of the other processing device (speaker unit) having the transmitter
mounted thereon can be obtained with respect to the processing device (speaker unit) having the
two detectors mounted. Then, by repeatedly performing such triangulation, the arrangement of a
plurality of processing devices (speaker units) is required.
[0232]
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Further, in each of the above-described embodiments, as a specific embodiment of the signal
processing system and the speaker system of the present invention, an embodiment in which the
detector and the transmitter are mounted on different processing devices (speaker units) is
exemplified. However, the present signal processing system and speaker system are not limited
to this. The signal processing system and the speaker system of the present invention may be
configured such that both a detector and a transmitter are mounted on part or all of a plurality of
processing devices (speaker units). However, even in this case, with respect to the processing
device (speaker unit) equipped with the detector, the relative position of the one equipped with
the transmitter can be determined by a processing device other than the processing device. It
becomes the same as the embodiment.
[0233]
In each of the above-described embodiments, as a specific embodiment of the signal processing
system and the speaker system of the present invention, a mode in which each of the detector
and the transmitter is necessarily mounted on any one of the processing devices (speaker units)
Illustrated. However, the present signal processing system and speaker system are not limited to
this. The signal processing system and the speaker system of the present invention have a
configuration in which one of the detector and the transmitter is mounted on all processing
devices (speaker units) and the other is installed outside the processing devices (speaker units). It
is good. In this case, the relative position between the processing devices can be obtained by
finding the relative position of each processing device (speaker unit) with respect to the device
installed outside the device.
[0234]
Further, in each of the above embodiments, as a specific embodiment of the signal processing
system and the speaker system of the present subject, a form in which a radio wave signal or a
test sound is adopted as an example of a wireless signal is exemplified. However, the present
signal processing system and speaker system are not limited to this. The signal processing
system and the speaker system of the present invention may have a form in which a signal using,
for example, infrared light or light as a medium is adopted as the wireless signal.
[0235]
1, 100, 200, 300, 500 Speaker system 10 Speaker unit 11 Speaker 20 Transmitter 30 Detector
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40 Placement judgment unit 50 Sound signal sorting unit 110, 210, 310 First speaker unit 110a,
120a, 210a, 220a, 310a, 320a chassis 111 first speaker 112, 512 amplifier unit 113 radio wave
reception board 113a right radio wave receiver 113b left radio wave receiver 114, 212, 312
output channel switching control unit 114a sound signal input unit 114b, 212a, 312a positional
relation Discrimination unit 114c Selector switch 114c̲R R side sound signal input terminal
114c̲L L side sound signal input terminal 114c̲1 first sound signal output terminal 114c̲2
second sound signal output terminal 114c̲sR R side switch 114c̲s L L side switch 115, 513
Power supply section 120, 220, 320 2nd speaker unit 121 2nd speaker 122 radio wave
transmission board 122a radio wave transmitter 132, 532 1st connection cable 133, 231, 331,
533 2nd connection cable 150, 550 sound source device 211 test sound detection board 211a
microphone 211b on the right side microphone on the left 221 test sound output unit 311
wireless receiver mounting board 311a wireless receiver 321 wireless tag mounting board 321a
wireless tag 510 R side speaker unit 511 R side speaker 520 L Side speaker unit 521 L side
speaker
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