JP2013038511

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DESCRIPTION JP2013038511
The present invention provides an audio data reproduction technology capable of reproducing a
sense of reality more abundantly. A planar reproduction device 3 is used, in which a plurality of
speaker units 2 are arranged in a row and in a row in a close proximity state so that adjacent
ones restrict the spread of sound. When expressing the sound image of the sound source to be
reproduced in small size, setting the number of speaker units 2 to be reproduced in the close
state in the planar reproduction device 3 large, while expressing the sound image of the sound
source to be reproduced large, planar reproduction The number of speaker units 2 to be
reproduced in the device 3 is set to be small. [Selected figure] Figure 1
Audio data reproduction method and audio data reproduction device
[0001]
The present invention is a reproduction technique for reproducing audio data using a planar
reproduction apparatus in which a plurality of speaker units are arranged side by side in vertical
and horizontal directions so as to regulate the spread of sound. The present invention relates to a
reproduction method and an audio data reproduction device).
[0002]
Conventionally, as a reproduction technology of this type of audio data, the same audio data is
transmitted at the same volume to all of the speaker units constituting the planar reproduction
apparatus and reproduced at one time, and an acoustic beam having directivity is obtained. The
configuration has been implemented to output (see, for example, Patent Document 1).
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[0003]
Unexamined-Japanese-Patent No. 2006-303717 (FIG. 4)
[0004]
According to the above-described conventional reproduction technique of audio data, for
example, when separately playing a sound source that contains a solo of trumpet or a sound that
includes a solo of a piano, either of the sound sources The size of the sound image reproduced by
the planar reproduction device is expressed in the same manner.
That is, the trumpet, which should be a small sound image, and the piano, which should be a
large sound image, are reproduced as the same sound image size by the acoustic beam by the
planar reproduction device, and there is a discrepancy with real performance and lack of
presence There was a problem.
[0005]
Therefore, an object of the present invention is to provide an audio data reproduction technique
which can solve the above problems and can reproduce richness in presence more realistically
according to the actual performance.
[0006]
According to a first aspect of the present invention, there is provided a planar reproduction
apparatus in which a plurality of speaker units are arranged in the form of rows and columns in
close proximity so that adjacent ones regulate the spread of sound. When expressing the sound
image of the sound source to be reproduced using the device small, while setting a large number
of the speaker units to be reproduced in the close state in the planar reproduction device, while
expressing the sound image of the sound source to be reproduced large. Is to set a small number
of the speaker units to be reproduced in the planar reproduction device.
[0007]
According to the first feature configuration of the present invention, when expressing the sound
image of the sound source to be reproduced small, it is carried out by setting and reproducing a
large number (for example, 100% setting) of the number of speaker units juxtaposed vertically
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and horizontally. Ru.
In this case, due to the interaction between the sounds reproduced from the adjacent speaker
units, the diffusion of the sound in the width direction and the height direction is almost
eliminated, and the rectilinearity in the forward direction is improved. You can send playback
sound with very little diffuse sound to the listening position that spreads out.
As a result, by reducing the diffuse sound, it is possible to reproduce a sound with a small spread,
that is, a sound with a small sound image.
On the other hand, when the sound image of the sound source to be reproduced is largely
expressed, the number of speaker units juxtaposed vertically and horizontally is set to a small
number (for example, a single setting) and the reproduction is performed.
In this case, since the interaction between the adjacent speaker units is weakened (or eliminated),
the diffuse sound in the width direction and the height direction is increased, and the
rectilinearity in the forward direction is reduced. It spreads forward and can play reproduced
sound with extremely diffuse sound to the listening position. As a result, due to the large amount
of diffuse sound, the sound can be reproduced as a large spread sound, that is, a sound with a
large sound image. As described above, the size of the sound image can be arbitrarily set and
reproduced with respect to the sound source. For example, for a sound such as a trumpet having
a small sound image, the number of speaker units to be reproduced should be set large. Can be
reproduced as a small sound of the sound image. In addition, for sounds such as a piano having a
large sound image, the sound can be reproduced as a large sound by setting the number of
speaker units to be reproduced to a small number. Furthermore, by adjusting and sending a
plurality of sound sources different in these sound images to the planar reproduction apparatus
as described above, for example, a small trumpet sound of the sound image is produced from the
right side, and a large sound image is produced from the left side. It becomes possible to
reproduce the sound source such as the sound of the piano, and it is possible to reproduce a rich
sense of reality that is more in line with the actual performance.
[0008]
According to a second feature of the present invention, the total volume of all the speaker units
to be reproduced is allocated to each speaker unit used for reproduction so that the total value
becomes the same regardless of the magnitude of the sound image to be expressed. Where to set.
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[0009]
According to the second feature configuration of the present invention, it is possible to prevent
the volume from being changed by changing the sound image.
For example, when there is a sound source to be reproduced at a predetermined volume, if the
number of speaker units to be reproduced is increased or decreased in order to change the sound
image of the sound source while maintaining the volume of each speaker unit Results in changes
and can not be reproduced as intended. Therefore, the total volume remains the same as
intended by allocating to each speaker unit and setting each volume so that the total volume of
all the speaker units to be reproduced has the same value regardless of the magnitude of the
sound image to be expressed. While maintaining, only the sound image can be changed in size.
As a result, it is possible to reproduce a rich sense of reality more in line with the actual
performance. In the case where a plurality of sound sources are reproduced in a composite
manner, the above-described sound volume may be allocated for each sound source, and it does
not mean that the sound sources have the same volume.
[0010]
According to a third aspect of the present invention, the localization of sound and the size of a
sound image are respectively set for a plurality of sound source audio data, and the planar
reproduction corresponding to the localization is performed for each sound source audio data to
be reproduced. The center position in the apparatus is determined, and the speaker unit in the
range corresponding to the size of the sound image is selected with the center position as the
center, and the sound source audio data is reproduced.
[0011]
According to the third aspect of the present invention, to reproduce a plurality of sound source
audio data at one time, reproduction is performed in a state in which localization of sound and
the size of a sound image are separately set for each sound source. Can.
As a result, for example, to reproduce a performance by a large number of instruments such as
an orchestra, the localization and the size of the sound image can be set for each instrument, and
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the performance can be reproduced in a very near-live state.
[0012]
According to a fourth aspect of the present invention, there is provided a planar reproduction
apparatus in which a plurality of speaker units are arranged in a row and in a row in a close
proximity state so that adjacent ones regulate the spread of sound. An input unit for inputting is
provided, a transmission mechanism capable of separately transmitting sound source audio data
from the input unit to each of the speaker units is provided, and the transmission mechanism
includes selection means for selectively transmitting the sound source audio data It is located in
[0013]
According to the fourth feature configuration of the present invention, it is possible to select
sound source audio data from the input unit by the selection means, send the sound source audio
data from the transmission mechanism, and reproduce it from the transmission unit.
As a result, the sound image of the sound source can be changed and reproduced by adjusting
the number of speaker units to be reproduced. Therefore, originally, when reproducing audio
data of a sound source with a small sound image, selecting many speakers by the selection
means to reproduce as a small sound image or conversely when reproducing audio data of a
sound source with a large sound image By means of the selection means, fewer speakers can be
selected and reproduced as a large sound image, and a richer sense of reality can be reproduced.
In addition, a sound image different from the size of a real sound image can also be expressed by
the selection means, and data can be reproduced with richer expressiveness.
[0014]
A block diagram showing a reproduction device of audio data. A front view schematic view of a
reproduction unit. A plane schematic view showing a reproduction state of a speaker unit.
[0015]
Embodiments of the present invention will be described below based on the drawings.
[0016]
FIG. 1 shows an embodiment of a playback apparatus (hereinafter simply referred to as a
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playback apparatus 1) used in the audio data playback method of the present invention.
[0017]
The reproducing apparatus 1 includes a reproducing unit (corresponding to a planar reproducing
apparatus) 3 and a reproducing unit in which a plurality of speaker units 2 are arranged in a row
and in a row in close proximity so that adjacent ones restrict the spread of sound. A transmission
unit 4 for transmitting reproduction data is provided at 3.
[0018]
The reproduction unit 3 is provided with an installation interval dimension P within a range in
which the adjacent speaker units 2 restrict the diffusion of sound around the central axis of the
speaker due to the sound pressure of each other.
In the present embodiment, the following description will be made with an example in which a
total of nine speaker units 2 of three horizontal rows and three vertical stages are provided.
For convenience, as shown in FIG. 1 and FIG. 2, each speaker unit 2 is SP11, SP21, SP31 in order
from lower left to right in front view, SP21, SP22, SP32, upper in order from middle left to right
The numbers SP31, SP32 and SP33 are assigned in order from left to right.
[0019]
As an example of the embodiment of the speaker unit 2, one having a diameter of about 35 mm
can be used, and in this case, the vertical and horizontal installation spacing dimension P is set to,
for example, about 35 mm having the same value as the diameter. preferable.
Also, each speaker unit 2 is configured to be able to reproduce audio data with the same phase.
[0020]
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That is, the sound reproduced by the single speaker unit 2 is diffused in the process of
propagating forward from the speaker unit 2 as shown in FIG. 3 (a).
On the other hand, as shown in FIG. 3 (b), the diffusion width of the sounds reproduced from the
plurality of adjacent speaker units 2 is narrowed by the action of each sound pressure, and as a
whole, in the width direction and the height direction In the beam-like propagation range, there
is almost no diffusion of sound. At the listening position 5 in front of the reproduction unit 3, in
the reproduction state shown in FIG. 3A, the reproduction sound can be heard as a large sound
image having a spread. On the other hand, in the playback state shown in FIG. 3B, the playback
sound can be heard as a small sound image with a small spread.
[0021]
As shown in FIG. 1, the transmitting unit 4 has an input unit 4A for receiving the sound source
audio data S from the recording unit 6 recording the sound source audio data S, and a setting
unit 4B for setting reproduction conditions for the received sound source audio data S. The
control unit (corresponding to selection means) 4C which allocates the corresponding sound
source audio data S to the corresponding speaker unit 2 according to the reproduction condition
by the setting unit 4B, and the sound source audio data S allocated by the control unit 4C An
amplifier unit (corresponding to a transmission mechanism) 4D for transmitting to the speaker
unit 2 is provided.
[0022]
The input unit 4A is provided for each sound source audio data S, and is configured to be able to
be input individually.
[0023]
The setting unit 4B can set the localization of the sound with respect to each sound source audio
data S and the size of the sound image, and can be appropriately input by the interface.
[0024]
The control unit 4C determines the center position of the reproduction unit 3 corresponding to
the localization according to the localization of the sound for each sound source audio data S set
by the setting unit 4B and the size of the sound image, and centers the center position The
speaker unit 2 in the range corresponding to the size of the sound image is selected, and
transmission control of the sound source audio data S is performed to the amplifier unit 4D.
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[0025]
The amplifier unit 4D is configured to include, for one speaker unit 2, a mixing unit 7 having the
number of inputs corresponding to the number of sound source audio data S, a preamplifier unit
8, and a power amplifier unit 9. The sound source audio data S allocated by the control unit 4C
can be transmitted in a synthesized state to each of the corresponding speaker units 2.
[0026]
An example of the reproduction method will be described.
The first sound source audio data S1 is sound recording data of a piano which is an example of a
large sound image, and the second sound source audio data S2 is sound recording data of a
harmonica which is an example of a small sound image.
The piano (first sound source audio data S1) is localized at the left end of the reproduction unit 3
in a front view, and the harmonica (second sound source audio data S2) is localized at the center
of the reproduction unit 3 in front view.
The localization of the sound and the size of the sound image are input to the setting unit 4B.
As the input interface, for example, a known one such as a liquid crystal operation panel with a
touch sensor, a dial type operation panel, or a fader type operation panel can be selected and
used.
[0027]
The sound of the piano having a large sound image is set to a small number of speaker units 2 to
be reproduced, and the sound of the harmonica having a small sound image is set to a large
number of speaker units 2 to be reproduced.
An example of allocation of audio data S to each speaker unit 2 by the control unit 4C will be
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described. Since the sound of the piano (first sound source audio data S1) is localized at the left
end, the speaker unit of SP21 is at the center position, and the sound image is large. The large
piano sound of the sound image is reproduced from the left end. Since the sound of the
harmonica (second sound source audio data S2) is centered at the localization, the speaker unit
of SP22 is at the center position, and the sound image is small, so all the speaker units 2 are
sounded. The small harmonica sound of the sound image is played from the center. In this
example, the volume of the piano and the volume of the harmonica are set to be the same. As a
result, the total volume of all the speaker units 2 to be reproduced is reproduced so that the
piano and the harmonica have the same value. Therefore, assuming that the sound of the
harmonica is reproduced at n dB in each of the speaker units 2, the sound of the piano is
reproduced at (9 × n) dB in the speaker unit of SP22. As a result, the speaker unit of SP22 is (10
× n) decibels as the sum of the harmonica and piano sounds, and the other speaker units are n
decibels. However, when a difference is made between the volume of the piano and that of the
harmonica, it is allocated according to the respective conditions.
[0028]
The sound S1 of the piano and the sound S2 of the harmonica are separately sent from the
control units 4C to the amplifier unit 4D and combined in the mixing unit 7 and sent to the
corresponding speaker unit 2 as indicated by the solid line in FIG. Be Therefore, at the listening
position 5, the sound of the piano localized at the left end and the sound of the harmonica
localized at the center are simultaneously reproduced, and the localization and sound image of
each are reproduced more clearly.
[0029]
Another Embodiment Another embodiment will be described below.
[0030]
<1> The planar reproduction device 3 is not limited to the three-row three-stage speaker unit 2
described in the previous embodiment, and may have a multi-row / multi-stage configuration.
Moreover, the space ¦ interval dimension of each speaker unit 2 should just exist in the state
which mutually regulates the expansion of a sound thing. <2> The distribution of the sound
volume to each speaker unit 2 to the size of the sound image by the control unit 4C is not limited
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to the one described in the previous embodiment, and, for example, In addition to this, it is also
possible to control the size of the sound image by controlling the volume of the central portion
and the speaker unit 2 on the outer periphery side to make the central portion larger and the
outer periphery smaller. In addition, a configuration may be incorporated in which the phase of
the sound reproduced from the speaker units 2 arranged in a line (or one step) is gradually
shifted from the end. In this case, the position of the wave front surface of each speaker unit 2 is
gradually Because the sound changes into a straight line, it can be delivered to the listening
position 5 as a directional sound that is not straight but inclined to the left and right (or up and
down). <3> The number of input units 4A is not limited to two as described in the previous
embodiment, and one or three or more may be used. In short, single or a plurality of sound
source audio data S can be reproduced simultaneously. <4> Further, a screen may be disposed on
the front of the planar reproduction device 3 so as to display an image synchronized with the
sound.
[0031]
As mentioned above, although the reference numerals are given to make the contrast with the
drawings more convenient, the present invention is not limited to the configuration of the
attached drawings by the description. Moreover, of course in the range which does not deviate
from the summary of this invention, it can implement in a various aspect.
[0032]
2 Speaker unit 3 Reproduction unit (corresponding to planar reproducing device) 4A Input unit
4C Control unit (corresponding to selection means) 4D Amplifier unit (corresponding to
transmission mechanism) S Sound source audio data
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