JP2008172551

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DESCRIPTION JP2008172551
PROBLEM TO BE SOLVED: To provide a system capable of efficiently switching between a
speaker output state and a headphone output state without requiring complicated operations in
an AV system and a speaker system for reproducing three-dimensional sound. SOLUTION: The
AV system comprises an AV apparatus 10 having a wireless transmission function of voice, a rear
speaker apparatus 30, and a wireless receiver 20 capable of outputting voice from headphones
by wireless reception. The rear speaker device 30 receives an audio signal based on wireless
reception from the wireless receiver 20 when the device mounting unit 31 to which the wireless
receiver 20 can be mounted and the wireless receiver 20 is mounted to the device mounting unit
31. And a speaker output configuration. Furthermore, the AV apparatus 10 is configured to
identify whether the wireless receiver 20 is attached to the device attachment unit 31 and to
change the operation mode related to audio processing according to this state. [Selected figure]
Figure 1
ＡＶシステムおよびスピーカシステム
[0001]
The present invention relates to an AV system comprising an AV (audio visual) device for
outputting video and audio, a speaker device such as a rear speaker, and a wireless receiver
capable of outputting a headphone by wireless reception, and the above speaker device And a
speaker system with a wireless receiver.
[0002]
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1
BACKGROUND In recent years, audio systems that perform stereophonic sound reproduction
using multichannel audio signals are well known.
For example, three speakers are arranged at the front center and the front left and right, two
speakers are arranged at the rear left and right, and audio output of different channels is
performed by each speaker, thereby realizing reproduction of stereoscopic sound.
[0003]
In addition, wireless headphone systems have also been developed that wirelessly transmit
analog audio signals and digital audio data via infrared or wireless, enabling audio output from
headphones without the need for an audio cable. .
[0004]
Further, as prior art related to the present invention, there has been disclosed the following
technology.
For example, Patent Document 1 discloses an audio reproduction system that stops wireless
transmission of an audio signal when a plug is inserted into a headphone jack, or stops output of
a front speaker when using a wireless headphone.
[0005]
Further, Patent Document 2 discloses a surround system that switches between speaker output
and wireless transmission of an audio signal by selecting an operation mode. Further, Patent
Document 3 discloses a technology for preventing interference and malfunction by changing a
modulation method between headphone and speaker by wireless transmission of an audio signal.
JP 2005-124106 JP 05-122789 JP 05-002500 JP
[0006]
Even in the case of an audio system that reproduces a three-dimensional sound using three or
more speakers, for example, in the middle of the night, the output from the speakers may be
stopped to listen to voice or music using headphones.
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[0007]
However, in the above audio system, when switching from the speaker output state of
stereophonic sound to the headphone output state, the channel type of the audio output is
changed, the output mode is changed, or the output from the rear speaker It is necessary to
perform complicated operations such as stopping the
[0008]
In addition, the rear speakers and headphones may be configured to transmit audio wirelessly or
by infrared rays, since they are used at places remote from the playback device.
However, in such a case, providing the wireless reception function for both the rear speaker and
the headphone results in providing the two wireless reception functions even though the rear
speaker and the headphone are not used simultaneously. It was thought that waste had occurred.
[0009]
SUMMARY OF THE INVENTION An object of the present invention is to provide an AV system
and a speaker system for reproducing three-dimensional sound, which can efficiently switch the
state of the speaker output and the state of the headphone output without wasteful operation. To
provide.
Another object of the present invention is to reduce cost by eliminating unnecessary transmitting
and receiving circuits for wirelessly transmitting sound to a speaker device and headphones.
[0010]
In order to achieve the above object, the present invention provides an AV apparatus provided
with a wireless transmission function of audio signal or audio data, a speaker apparatus
configured separately from the AV apparatus, and an audio signal or audio from the AV
apparatus. A wireless receiver capable of wirelessly receiving data and outputting sound from
headphones, the speaker device including an apparatus mounting unit to which the wireless
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3
receiver can be mounted, the wireless receiver being mounted to the apparatus mounting unit Is
configured to input an audio signal based on wireless reception from the wireless receiver and
output it as a speaker, and the AV apparatus determines whether the wireless receiver is
attached to the device attachment unit. According to this state, the operation mode related to the
voice processing is changed.
[0011]
Here, as the AV apparatus, for example, various apparatuses that perform audio output and video
output such as a digital television receiver and an optical disk reproduction apparatus can be
applied.
The wireless receiver may be, for example, an apparatus integrated with a headphone, or an
apparatus having a headphone connection terminal and outputting an audio signal from the
terminal to the headphone.
[0012]
According to such means, the operation mode of the audio output is automatically changed only
by attaching and detaching the wireless receiver to and from the device mounting portion of the
speaker apparatus, so that the user does not have to operate the headphone. It is possible to
obtain an aspect of audio output that matches the use time and the speaker output time. Also,
since the audio output to the speaker device is wirelessly received by the wireless receiver, the
speaker device can also be made wireless, and the wireless reception circuit is common to the
headphone and the speaker, so that the cost Can be reduced. In addition, there is no
inconvenience that interference occurs between the headphone wireless signal and the speaker
wireless signal.
[0013]
Preferably, the AV apparatus is capable of multi-channel audio signal processing, and is
configured to change a channel type of audio to be transmitted wirelessly depending on whether
or not the wireless receiver is attached.
[0014]
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Preferably, the AV apparatus wirelessly transmits an audio signal or audio data of a channel
other than the front output when determining that the wireless receiver is attached, and
determines that the wireless receiver is not attached. In some cases, it may be configured to
wirelessly transmit audio signals or audio data for headphone output.
[0015]
More preferably, the AV apparatus outputs audio from its own speaker when it is determined
that the wireless receiver is attached, and when it is determined that the wireless receiver is not
attached. It may be configured to stop voice output.
With such a configuration, it is possible to automatically switch between the preferred states
when enjoying three-dimensional sound with the speaker output and when stopping the speaker
output and enjoying audio reproduction only from the headphones.
[0016]
Preferably, the wireless receiver is provided with a first communication unit capable of wireless
communication, a connection detection unit for detecting whether or not the device is attached to
the device attachment unit, and whether the device is attached to the device attachment unit A
first control unit for transmitting status information indicating whether or not to be transmitted
via the first communication unit, and the AV apparatus includes a second communication unit
capable of wireless communication, and the second communication unit Preferably, second
control means is provided for changing the operation mode related to the audio processing based
on the status information received.
With such a configuration, the mounting state of the wireless receiver can be reliably transmitted
to the AV apparatus side.
[0017]
More preferably, the wireless receiver includes a secondary battery for supplying an operating
voltage of an internal circuit, and the speaker device includes a charging circuit for charging the
secondary battery and the device mounting unit. The wireless receiver may be provided with a
charging output terminal capable of outputting a charging voltage.
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[0018]
According to such a configuration, the wireless receiver can be charged when switching to the
speaker output and not using headphones, which is very convenient.
In addition, since the circuit for supplying the charging power of the wireless receiver can also be
used as the configuration of the speaker device (for example, the power supply circuit on the
primary side can be used), the cost can be reduced.
[0019]
Further, in order to achieve the above object, according to the speaker system of the present
invention, a speaker device for outputting audio of any one of multi-channel audio signals and
wirelessly receiving audio signals or audio data of a predetermined format for headphone A
wireless receiver capable of outputting audio from the speaker device, and the speaker device
receives an audio signal or audio data from a device mounting unit to which the wireless receiver
can be mounted and the wireless receiver mounted on the device mounting unit An audio input
terminal, and a speaker unit that outputs an audio based on an audio signal or audio data input
from the audio input terminal, and the wireless receiver is configured to receive the audio input
terminal when mounted on the device mounting unit. Audio output terminal connectable to the
device, communication means capable of wireless communication, and whether or not the device
is attached A connection detection means for detecting that was configured to status information
indicating whether it is attached to the device mounting portion and a control means for
transmitting through said communication means. According to such a speaker system, various
effects and effects as described above can be obtained by using the above-described AV device in
combination.
[0020]
As described above, according to the present invention, in the AV system and the speaker system
capable of reproducing three-dimensional sound, the state of the speaker output and the state of
the headphone output do not require complicated operations and are streamlined efficiently. It
has the effect of being able to switch.
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[0021]
In addition, wireless transmission of sound to the speaker device and the headphones has an
effect that cost reduction can be achieved by sharing the reception circuits of the both.
[0022]
Hereinafter, embodiments of the present invention will be described based on the drawings.
FIG. 1 is a diagram showing an entire configuration of an AV system according to this
embodiment, and FIG. 2 is a block diagram showing a circuit configuration of each component
device.
[0023]
In the AV system of this embodiment, for example, a display apparatus (AV apparatus) 10 with a
disc reproduction function and reproducing an image and audio output by reproducing an optical
disk storing video data and multi-channel stereo audio data is stored. A wireless receiver 20
capable of outputting sound to the headphone 25 by wireless reception, and a rear speaker
device 30 disposed at the opposite side of the display device 10 and performing sound output of
multi-channel rear left and right channels, for example It is.
[0024]
As shown in FIG. 2, the display device 10 combines a disc reproducing unit 101 for reproducing
an optical disc, composites the reproduced video data and audio data, and encodes audio data
and audio signals for wireless transmission. The signal processing circuit 102, the display unit 11
for outputting reproduced video, the amplifier 103 for amplifying the reproduced audio signal to
a set volume, and the speaker 12 for audio output, for example, transmits and receives digital
signals wirelessly A wireless transmission / reception circuit 105 and a controller 104 as a
second control means for controlling each part are provided.
[0025]
For example, when the multi-channel audio is reproduced, the above-mentioned speaker 12 is for
performing audio output of the front left and right channels.
[0026]
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The controller 104 can change the channel of an audio signal for wireless transmission by
outputting a command to the signal processing circuit 102.
In addition, it is possible to control the amplifier 103 to mute the output from the speaker 12 or
to cancel the mute.
[0027]
The wireless receiver 20 includes, for example, a wireless transmission and reception circuit 201
that transmits and receives digital signals wirelessly, a signal processing circuit 202 that
demodulates received audio data and performs D / A conversion, an amplifier 203 for headphone
output, and a headphone plug The connection state of the bedphone connection terminal 204 to
which the speaker is connected, the output circuit 205 for outputting a rear speaker audio signal,
the audio output terminal 207 for outputting a rear speaker audio signal, and the audio output
terminal 207 A connection detection circuit 206 for detecting, a controller 209 as a first control
means for controlling each part, a battery (secondary battery) 212 for supplying a power supply
voltage to each part, and a charge for inputting a charging voltage to the battery 212 It has an
input terminal etc.
[0028]
The above-mentioned headphone connection terminal 204 is, for example, a general headphone
jack, and is formed on the top surface or the side surface of the housing of the wireless receiver
20.
On the other hand, the voice output terminal 207 and the charging input terminal 211
mentioned above contact the terminals of the rear speaker device 30 when the wireless receiver
20 is attached to the rear speaker device 30, for example, the bottom of the housing etc. Is
formed.
[0029]
The controller 209 can extract voice data from the wirelessly received data and send it to the
signal processing circuit 202, and can control the operation of the amplifier 203 and the output
circuit 205 on / off.
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[0030]
The connection detection circuit 206 monitors, for example, the impedance of the audio output
terminal 207 to detect whether or not it is in a connected state.
[0031]
As shown in FIG. 1, the rear speaker device 30 is provided with a mounting portion 31 for
mounting the wireless receiver 20 in its housing.
The mounting unit 31 is, for example, a hole type into which the lower half of the wireless
receiver 20 can be inserted, but various other methods may be adopted as the device mounting
unit.
For example, the housing of the rear speaker device 30 may be provided with an opening /
closing panel and an accommodation space inside thereof, and the whole wireless receiver 20
may be accommodated in the accommodation space.
[0032]
As shown in FIG. 2, the rear speaker device 30 receives an audio input terminal 301 and a
charging output terminal 312 disposed in the mounting unit 31, and an input circuit 302 for
inputting an audio signal from the audio input terminal 301. For example, an amplifier 303 for
amplifying an audio signal, a speaker 32 for performing audio output by the audio signal, a
connection detection circuit 304 for monitoring an impedance and detecting a connection state
of an audio input terminal, an input circuit 302 and an amplifier 303 For example, a power
supply control circuit 305 that controls on / off of a power supply input, a power supply circuit
310 that generates an operating voltage used by each unit by inputting an AC power supply, and
charging of a battery connected to the charging output terminal 312 The charging circuit 311 is
provided.
[0033]
Next, the operation of the AV system with the above configuration will be described with
reference to the flowcharts of FIGS.
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[0034]
Between the display device 10 and the wireless receiver 20, request and response of status
information indicating whether the wireless receiver 20 is attached to the rear speaker device 30
are performed in short cycles.
[0035]
FIG. 3 is a flowchart illustrating processing related to transmission and reception of status
information performed by the display device 10 and the wireless receiver 20.
The status confirmation process of FIG. 3A is a process executed by the controller 104 of the
display device 10 every short cycle (for example, several seconds to several seconds).
In addition, even during transmission of audio data by radio, this process is performed by
including transmission / reception data during transmission of the audio data, so that the
processing is always executed every predetermined cycle. ing.
[0036]
When a predetermined cycle has elapsed, the controller 104 of the display device 10 shifts the
control processing to this status confirmation processing.
Then, first, in step S1, the wireless transmission / reception circuit 201 is made to transmit a
status request signal for requesting the wireless receiver 20 for status information.
Next, in step S2, the transmission signal from the wireless receiver 20 is received by the wireless
transmission / reception circuit 201, and processing for extracting status information therefrom
is performed.
[0037]
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10
When the status information is received, the status confirmation process is ended, and the
process returns to the original control process.
After that, when the next predetermined cycle has passed again, the status confirmation process
is repeatedly executed such that the process shifts to the status confirmation process and the
process is executed.
[0038]
The status response process of FIG. 3B is executed each time reception of a status request signal
is confirmed by the controller 209 of the wireless receiver 20.
This process is executed every time a status request is made by performing transmission /
reception while including voice data while receiving voice data, even while voice data is being
wirelessly transmitted. It is supposed to be.
[0039]
When the wireless receiver 20 receives a status request signal and shifts to this response
processing, first, in step S11, processing for confirming the connection state of the audio output
terminal 207 is performed. The connection state of the audio output terminal 207 can be
confirmed, for example, by examining a predetermined flag stored in a status register in the
controller 209. In such a configuration, for example, when the connection detection circuit 206
detects a change in connection state, a signal is sent to the controller 209 to store status
information of connection or disconnection in the status register in the controller 209. To be
realized.
[0040]
Subsequently, in the branch process of step S12, if the confirmation result of the connection state
indicates that the audio output terminal 207 is connected, the process proceeds to step S13 to
generate status information of the rear speaker connection mode, and when not connected, step
S14. Go to to generate status information for the headphone connection mode.
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[0041]
After the status information is generated, the process proceeds to the subsequent step S15, the
wireless transmission / reception circuit 201 transmits the status information to the display
device 10, and the status response process is ended.
Then, while returning to the original control processing, next, when a status request signal is
received, this status response processing is repeatedly executed so that this processing is
executed again.
[0042]
By the control process as described above, the display device 10 can always identify whether the
wireless receiver 20 is attached to the attachment unit 31 of the rear speaker device 30 or not
attached.
[0043]
FIG. 4 shows a flowchart for explaining the processing contents to be changed in each of the
display device 10, the wireless receiver 20, and the rear speaker device 30 when the connection
state of the wireless receiver is changed.
The flowchart of FIG. 4 is for the case where the wireless receiver is attached to the rear speaker
device. Note that FIG. 4 and the flowchart of FIG. 5 described later merely list the processing
performed by each device, and each processing is not performed in the order of steps.
[0044]
When the wireless receiver 20 is attached to the attachment unit 31 of the rear speaker device
30, first, the controller 209 of the wireless receiver 20 recognizes that the attachment unit 31 is
attached based on the signal from the connection detection circuit 206. Do.
[0045]
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Then, based on the above recognition, the controller 209 of the wireless receiver 20 performs
some processing shown in step J1 of FIG.
That is, the headphone amplifier 203 is turned off to stop the output of the headphone
connection terminal 204, and at the same time, the output circuit 205 is turned on from the off
state to output an audio signal from the audio output terminal 207. .
[0046]
Further, in the rear speaker device 30, when the wireless receiver 20 is attached, the connection
detection circuit 304 detects this and outputs a detection signal to the power control circuit 305.
Then, based on this detection signal, the power control circuit 305 turns on the main power as
shown in step J2. As a result, the operating voltage is supplied to the input circuit 302 and the
amplifier 303, and an audio signal based on the reception of the wireless receiver 20 is input
from the audio input terminal 301 and output from the speaker 32.
[0047]
Also, in parallel with this, the charging input terminal 211 of the wireless receiver 20 and the
charging output terminal 312 of the mounting unit 31 are connected, and a charging voltage is
supplied from the charging circuit 311 to the battery 212, and the wireless receiver Charging of
20 is started.
[0048]
Further, as shown in FIG. 3, since the controller 104 of the display device 10 can identify
whether the wireless receiver 20 is attached to the rear speaker device 30 by transmitting and
receiving wireless data, step J3 based on this identification. Do some processing of
That is, first, the setting of the amplifier 103 is changed from the mute state to the normal state,
and the audio output from the speaker 12 of the display device 10 is resumed. In addition, the
audio data being wirelessly transmitted is changed to one for rear speakers (for example, rear
(left / right) audio data of multi-channel audio).
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[0049]
By these processes, the speaker device 10 of the display device 10 outputs front (left / right)
audio of multi-channel audio, and the rear speaker device 30 performs multi-channel audio rear
(left / right) by wireless transmission. Audio output is performed, and stereophonic speaker
output is realized.
[0050]
FIG. 5 is a flowchart illustrating the process contents to be changed in the display device 10, the
wireless receiver 20, and the rear speaker device 30 when the wireless receiver is removed from
the rear speaker device.
[0051]
On the other hand, when the wireless receiver 20 is removed from the mounting unit 31 of the
rear speaker device 30, first, the controller 209 of the wireless receiver 20 is removed from the
mounting unit 31 based on the signal from the connection detection circuit 206. recognize.
[0052]
Then, based on this recognition, the controller 209 of the wireless receiver 20 performs some
processing shown in step J4 of FIG.
That is, the headphone amplifier 203 is switched from the off state to the on state to resume the
output of the headphone connection terminal 204.
At the same time, the output circuit 205 is switched from the on state to the off state to stop the
output of the audio signal from the audio output terminal 207.
This enables the user to connect the headphones 25 to the wireless receiver 20 and listen to the
audio from the headphones.
[0053]
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Further, in the rear speaker device 30, when the wireless receiver 20 is unmounted, the
connection detection circuit 304 detects this and outputs a detection signal to the power control
circuit 305. Then, based on the detection signal, the power control circuit 305 turns off the main
power as shown in step J5. As a result, the operating voltage supplied to the input circuit 302
and the amplifier 303 is stopped. Although the output from the speaker 32 is stopped when the
wireless receiver 20 is disconnected and the input of the audio signal is stopped, the abovementioned operating voltage is stopped, so that the small noise output from the speaker 32 is
also perfect. And wasteful power consumption.
[0054]
Further, since the controller 104 of the display device 10 identifies that the wireless receiver 20
has been removed from the rear speaker device 30 by transmitting and receiving wireless data,
some processing of step J6 is performed based on this identification. That is, first, the setting of
the amplifier 103 is muted, and the audio output from the speaker 12 of the display device 10 is
stopped. In addition, audio data being transmitted wirelessly from that for the rear speaker to
that for headphone output (for example, audio data for the front (left / right) of multichannel
audio and audio for each channel of multichannel audio are mixed Audio data).
[0055]
By these processes, the output of each speaker is stopped, and an audio output for headphones is
given to the headphones 25 through the wireless receiver 20, and a state for headphone viewing
is realized.
[0056]
As described above, according to the AV system of this embodiment, the operating mode of the
audio output is automatically changed only by attaching and detaching the wireless receiver 20
to the mounting portion 31 of the rear speaker device 30. The user can easily switch the mode of
the audio output suited to the use of the headphone and the output of the speaker without
troublesome operations.
[0057]
Also, since the audio output to the rear speaker device 30 is by wireless transmission via the
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wireless receiver 20, the rear speaker device 30 can also be made wireless, and the wireless
circuit for wireless transmission is for headphones and for rear speakers And the cost can be
reduced accordingly.
In addition, there is no inconvenience that interference occurs between the headphone wireless
signal and the speaker wireless signal.
[0058]
The present invention is not limited to the above embodiment, and various modifications are
possible.
For example, in the above embodiment, a display device with an optical disk reproduction
function is exemplified as an AV device, but for example, a digital television receiver, an optical
disk reproduction device separated from a display or main speaker, a tuner device, a set top box,
etc. It is possible to apply various AV devices that output audio and video.
[0059]
In the above embodiment, the example in which the speaker apparatus is applied to the rear
speaker is shown, but in the case of supporting a multi-channel sound source having a larger
number of channels, it can be applied to another speaker for surround . The present invention
can also be applied to a speaker device that performs main audio output at a distance from the
AV device.
[0060]
In the above embodiment, transmission and reception of status information is always performed
every short cycle to convey the mounting state of the wireless receiver to the display device, but
for example, only when the mounting state is changed The changed status information may be
transmitted from the wireless receiver 20. In this case, by transmitting a response signal of
reception confirmation from the display device 10 and repeatedly transmitting the changed
status information from the wireless receiver 20 until the transmission is received, the certainty
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of transmission and reception of the status information can be secured.
[0061]
Further, in the above embodiment, detection of attachment / non-attachment of the wireless
receiver is performed by monitoring the impedance of a predetermined terminal, but, for
example, the bottom of the wireless receiver 20 or the attachment portion 31 may be detected. A
mechanical switch may be provided, and the mounting / non-mounting state may be detected
based on the detection output from the mechanical switch.
[0062]
Further, although the configuration for wirelessly transmitting digital audio data has been shown
in the above embodiment, it may be configured to wirelessly transmit analog audio signals.
Moreover, it is good also as a structure which used not infrared rays but infrared rays. Also, the
configuration for transmitting and receiving audio signals and audio data and the configuration
for transmitting and receiving status information indicating mounting / non-mounting of the
wireless receiver may be separately configured.
[0063]
Further, in the above embodiment, although the wireless receiver is configured separately from
the headphones, as shown in FIG. 6 showing another modification, the wireless receiver may be
configured to incorporate the function of the wireless receiver in the headphones 40. good. In
this case, the mounting portions 31B and 31B may be provided so that the headphones 40
themselves can be mounted to the speaker device 30B. Also, various methods can be applied to
this mounting method.
[0064]
In addition, the detailed configurations, methods, and the like described in the embodiments can
be appropriately changed without departing from the scope of the invention.
[0065]
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FIG. 1 is a configuration diagram showing an entire AV system according to an embodiment of
the present invention.
It is a block diagram which shows the circuit structure of each component apparatus of AV
system. FIG. 6 is a flow chart illustrating a process for transmitting and receiving status
information performed by the display device and the wireless receiver. When a wireless receiver
is mounted ¦ worn with a rear speaker apparatus, it is a flowchart explaining the processing
content performed by each apparatus. It is a flowchart explaining the processing content
performed by each apparatus, when a wireless receiver is removed from a rear speaker
apparatus. It is a block diagram which shows the example which made the wireless receiver
integral with the headphone.
Explanation of sign
[0066]
DESCRIPTION OF SYMBOLS 10 display apparatus (AV apparatus) 11 display part 12 speaker
101 disc reproduction part 102 signal processing circuit 103 amplifier 104 controller 105
wireless transmission / reception circuit 20 wireless receiver 25 headphone 201 wireless
transmission / reception circuit 202 signal processing circuit 203 amplifier 204 headphone
connection terminal 205 output Circuit 206 Connection detection circuit (connection detection
means) 207 Voice output terminal 209 Controller 211 Charge input terminal 212 Battery 30
Rear speaker device 31 Mounting part 32 Speaker 301 Voice input terminal 302 Input circuit
303 Amplifier 304 Connection detection circuit 305 Power control circuit 310 Power supply
circuit 311 Charging circuit 312 Charging output terminal
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