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JP2006060610

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DESCRIPTION JP2006060610
PROBLEM TO BE SOLVED: To provide an audio reproduction device and an audio beam reflection
position of an audio reproduction device capable of forming an optimal surround sound field by a
listener easily correcting an output angle of an audio beam according to setting of a listening
position of the audio reproduction device. Provide a correction method. SOLUTION: When
installed in a room for playing back surround sound, the audio reproduction device 1 receives an
input of installation position information of a speaker array 8 and listening position information
of a listener U by means of an operation unit 4, a system control unit 2 calculates the output
angle of the sound beam of the rear channel (SLch, SRch) output to the listener U and the first
reflection point which reflects the sound beam to the wall first, and this point is more than the
listener U It is determined whether or not it is located forward. When the first reflection point is
located in front of the listener U, the sound of the rear channel behind the position obtained by
calculation of the first reflection point is reflected, and the side of the listening position of the
listener U Change to a position where you can hear from the rear. [Selected figure] Figure 3
Audio reproduction apparatus and audio beam reflection position correction method for audio
reproduction apparatus
[0001]
The present invention relates to an audio reproduction apparatus that outputs a plurality of
audio beams to reproduce multi-channel surround audio, and more particularly to an audio
reproduction apparatus capable of correcting the localization position of a rear channel audio
beam according to a listener's listening position. And an audio beam reflection position
correction method of the audio reproduction device.
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1
[0002]
Conventionally, there has been proposed a technique for controlling the directivity of sound
signal propagation by forming a plurality of sound beams using a speaker array composed of a
plurality of speakers arranged in a matrix (for example, see Patent Document 1) ).
By using this technology, it is not necessary to install a plurality of speakers around a listener as
in a conventional surround system, and a plurality of sound beams are output from a single
panel-like speaker array to perform surround sound. Can be played.
[0003]
FIG. 5 is a top perspective view of a room in which the speaker device described in Patent
Document 1 is installed, and illustrates an example in which a 5.1 ch surround system is
configured by the speaker device including the speaker array. Here, in the following description,
in the 5.1ch surround system, the left channel on the front is L (left), the right channel on the
front is R (right), the center channel is C (center), and the rear left channel Is referred to as SL
(Surround Left) ch, the rear right channel is referred to as SR (Surround Right) ch, and the
subwoofer is referred to as LFE (Low Frequency Effects) ch.
[0004]
The speaker device 213 shown in FIG. 5 includes hundreds of speaker units arranged in a
predetermined array in one panel, and adjusts the timing of outputting surround sound from
each speaker unit for each channel to form a beam , And delay control so that the voice beam is
focused at an arbitrary point in space. Then, by reflecting the sound of each channel to the
ceiling or wall, a sound source is produced in the wall direction to reproduce the multi-channel
sound field. As shown in FIG. 5A, the speaker device 213 disposed near the center of the front
wall 220 of the room 211 and under the image device 212 installed in front of the listener U is a
center speaker ( C) and the same sound as that of a subwoofer (LFE) for bass reinforcement is
directly output to the listener U. In addition, the speaker device 213 reflects the sound beam on
the left and right walls 221 and 222 of the listener U to create a virtual Rch speaker 214 and a
virtual Lch speaker 215. Furthermore, the speaker device 213 reflects the voice beam on the left
and right walls 221 and 222 of the listener U and the rear wall 223 of the listener U, and virtual
SRch speakers 216 and virtual SLch speakers on the left and right behind the listener U Produce
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217. As described above, in the surround system using the speaker array, the sound signal of
each channel is delay-controlled to be beamed, and the beamed sound is reflected on the wall to
create a plurality of sound sources, thereby providing a surrounding of the listener U It is
possible to obtain a surround feeling as if a plurality of speakers were installed on the Japanese
Patent Publication No. 2003-510924
[0005]
As described above, the conventional audio reproducing apparatus reflects the audio beam on
the left and right / rear walls and ceiling of the listener U to reproduce the surround sound, so
that the listening position is located at the center of the room in which the audio reproducing
apparatus is installed. When playing back surround sound, it becomes an ideal sound field
environment. Therefore, the listener U can enjoy multi-channel sound (surround sound) in the
optimized surround environment.
[0006]
However, as shown in FIG. 5B, when the listening position is not set near the center of the room,
for example, near the wall 223 behind the room, the rear channels (SLch, SRch) may be selected
depending on the room shape and the listening position. The point (the first reflection point) at
which the sound beam of the light beam is reflected at the left and right walls 221 and 222 for
the first time may be in front of the listening position (on the side of the sound reproduction
device). Then, in this case, since the sound beam of the rear channel reflected at the first
reflection point passes near the listener U until it is reflected by the rear wall 223, the listener U
receives the rear channel sound. There was a problem that the localization was felt forward. In
addition, since the output angles of the front channel voice beam and the rear channel voice
beam are close, there is a problem that both voice beams can be heard overlapping from the
same direction. Therefore, the listener U could not enjoy the surround sound when setting the
listening position near the wall of the room.
[0007]
Therefore, according to the present invention, according to the setting of the listening position of
the audio reproducing device, the audio beam reflecting position of the audio reproducing device
and the audio reproducing device capable of setting the optimum surround environment by
correcting the output angle of the audio beam of the rear channel. The purpose is to provide a
correction method.
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[0008]
The present invention has the following configuration as means for solving the above-mentioned
problems.
[0009]
(1) A speaker array having a plurality of speakers arranged in a matrix or in a line, and an audio
beam of each channel of multi-channel surround sound from the speaker array is reflected
directly or by a wall to reach a listening position A beam control unit for controlling a beam
direction and a focal distance, wherein the beam control unit is configured to control a rear
channel audio listening position forward of a front channel audio listening position. The beam
direction and focal length can be controlled to be
[0010]
In a conventional audio reproduction apparatus that outputs a plurality of audio beams from a
speaker array to reproduce multi-channel surround audio, when the listening position of the
listener is set near the back wall of the room, the multi-channel surround audio is The position
where the sound beam of the rear channel reflects on the side wall is located in front of the
listener.
In this case, since the sound beam of the rear channel reflected by the side wall passes near the
listener before it is reflected by the rear wall, the listener feels the localization of the rear channel
sound forward, and the front Since the output angles of the voice beam of the channel and the
voice beam of the rear channel are close, both voice beams may be heard overlapping from the
same direction.
[0011]
In this configuration, since the sound reproduction apparatus can control the beam direction and
the focal length so that the listening position of the rear channel sound is ahead of the listening
position of the front channel sound, the above case It is possible to set the listening position of
the front channel audio and the listening position of the rear channel audio to different positions,
to prevent the rear channel audio beam from passing near the user, and to position the rear
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4
channel audio. Can be corrected right next to back.
Further, since the reflection position of the rear channel sound beam can be changed to a
position different from that of the front channel sound beam, a sense of separation from the front
channel sound beam can be secured.
[0012]
(2) The beam control means causes the rear channel sound beam to be reflected by the side wall
and the back wall to reach the listening position such that the sound beam of the front channel is
reflected by the side wall to reach the listening position; The beam direction and focal length are
controlled, and the beam direction of the rear channel sound beam is such that the front-back
relation of the reflection position on the side wall is the same as or later than the listening
position of the front channel sound. And controlling the focal length.
[0013]
In this configuration, the audio reproduction device sets the front-rear relation of the reflection
position on the side wall of the rear channel audio beam to the same position as the front
channel audio listening position or to the rear of that position. The listening position of the voice
and the listening position of the voice of the rear channel can be set to different positions, and
the voice beam of the rear channel can be prevented from passing near the user, and the
localization of the rear channel voice is from side to back It can be corrected.
In addition, since the reflection point of the rear channel sound beam can be changed to a
position different from the reflection point of the front channel sound beam, a sense of
separation from the front channel sound beam can be secured.
[0014]
(3) position input means for receiving the input of the installation position information of the
speaker array and the listening position information of the listener, and the rear channel for
outputting to the listener when the position input means receives the input of each position
information. Calculate the output angle of the sound beam and the position of the reflection
point, and determine whether the first reflection point where the sound beam of the rear channel
in multichannel surround sound is first reflected on the side wall is located ahead of the listener
Then, when the first reflection point is located in front of the listener, the sound of the rear
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channel at the listening position of the listener is behind the position calculated by the first
reflection point. And a beam correction means for correcting the position of the first reflection
point at a position where the sound can be heard from right beside to the rear.
[0015]
In this configuration, when the audio reproduction device receives the input of the installation
position information of the speaker array and the listening position information of the listener,
the output angle and the position of the reflection point of the rear channel audio beam output to
the listener are If the first reflection point at which the sound beam of the rear channel in multichannel surround sound is first reflected by the wall surface is located forward of the listener, the
position at which the first reflection point is calculated. Also, the position of the first reflection
point is corrected to the rear position where the sound of the rear channel can be heard from the
side to the rear at the listening position of the listener.
Therefore, the audio reproduction apparatus can set the localization of the rear channel audio
right next to or behind the audio listening position of the front channel, and can provide an
optimal surround environment according to the listener's listening position. .
[0016]
(4) When correcting the first reflection point, the beam correction means corrects so that the
volume level of the sound beam of the rear channel rises by a fixed amount at the time of
emission.
[0017]
By correcting the position of the first reflection point of the rear channel audio beam, the output
direction of the audio beam deviates slightly from the listening position. In this configuration, the
volume level of the rear channel audio beam is increased by a fixed amount. As a result, the
sound of the rear channel can be set so that the listener can reliably listen, and an optimal
surround environment can be provided to the listener.
[0018]
(5) When the position input means receives the installation position information of the speaker
array and the listening position information of the listener, the beam correction means outputs
the output angle and reflection of the sound beam of the rear channel to the listener Calculating
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the position of the point, wherein the beam correction means determines whether or not the first
reflection point at which the sound beam of the rear channel in multichannel surround sound is
first reflected by the wall surface is in front of the listener And, if the first reflection point is
located in front of the listener, the beam correction means is positioned behind the first reflection
point calculated by the calculation, and the sound of the rear channel is Correcting the position
to be reflected to a position where the user can hear from the side to the rear at the listening
position of the listener.
[0019]
In this configuration, the same effect as (3) can be obtained.
[0020]
In the present invention, the audio reproduction device can control the beam direction and the
focal length so that the listening position of the rear channel audio is in front of the listening
position of the front channel audio. By changing the listening position of the rear channel sound,
it is possible to correct the position where the rear channel sound beam is reflected on the wall
surface.
As a result, the reflection position of the sound beam of the rear channel can be corrected
according to the listening position of the listener to provide an optimal surround environment.
[0021]
FIG. 1 is a block diagram showing a schematic configuration of an audio reproduction apparatus
according to an embodiment of the present invention.
FIG. 2 is a layout diagram of the speaker array, where (A) shows the speakers arranged in a
matrix, (B) shows the speakers arranged in three lines in a line, and (C) shows three speakers in a
line. It is a case where it arranges in a row and makes a speaker of the 2nd row shifted.
In the following description, as an example of an audio reproduction apparatus, one for a 5.1 ch
surround system will be described.
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7
In the following description, in the 5.1ch surround system, the left channel on the front is L (left),
the right channel on the front is R (right), the center channel is C (center), and the rear left
channel is The SL (Surround Left) ch, the rear right channel is called SR (Surround Right) ch, and
the subwoofer is called LFE (Low Frequency Effects) ch.
In the 5.1ch surround system, the audio signal of LFEch has almost no directivity, and is output
directly from the audio reproducing apparatus to the listener U. Therefore, in the following
description, the description of processing of the audio signal of LFEch is omitted. Do.
[0022]
The audio reproduction device 1 includes a system control unit 2, a storage unit 3, an operation
unit 4, a display unit 5, a beam forming unit 7, and a speaker array 8. Further, the audio
reproduction device 1 is provided with inputs of Lch, Rch, SLch, SRch, and Cch as the
multichannel input 6 of the 5.1ch surround audio signal. Furthermore, the beam forming unit 7
delays each audio signal input from the multi-channel input 6 by a delay unit 31 and power
amplifiers 32-1 to 32 which amplify five audio signals output from the delay unit 31. And an
adder 33 for adding the signals output from the power amplifiers 32-1 to 32-5. In addition, the
beam forming unit 7 includes n blocks, the speaker array 8 includes n speakers 30, and the
speakers 30 are connected to the outputs of the adders 33 of the beam forming units 7,
respectively.
[0023]
The system control unit 2 includes a user I / F processing unit 11, a sound source position
calculation correction processing unit 12, and a beam control processing unit 13.
[0024]
The user I / F processing unit 11 outputs a signal to each unit of the audio reproduction device 1
according to the operation accepted by the operation unit 4.
Further, the user I / F processing unit 11 causes the display unit 5 to display the content to be
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notified to the listener U according to the state of the device.
[0025]
When the sound source position calculation correction processing unit 12 receives the
installation position information of the audio reproduction device 1 accepted by the operation
unit 4 and the listening position information of the listener U from the user I / F processing unit
11, these information Calculation of the angle at which each sound beam of 5ch surround sound,
that is, the sound beam of each channel of Cch, Lch, Rch, SLch, and SRch is output, the position at
which the sound beam is reflected on the wall, and the focal length. The sound beam emission
angle information that is the calculation result is output to the beam control processing unit 13.
[0026]
The beam control processing unit 13 outputs, to the beam forming unit 7, emission angle setting
information for setting the emission angle of the sound beam of each channel based on the sound
beam emission angle information output from the sound source position calculation correction
processing unit 12. .
Further, the beam control processing unit 13 also outputs the setting information of each
emission to the storage unit 3 and stores the setting information in the storage unit 3 so that the
information can be read out when the audio reproduction device 1 is activated next time or later.
Keep it.
[0027]
The storage unit 3 stores various programs to be executed by the audio reproduction device 1. In
addition, the storage unit 3 stores emission angle information of each sound beam set when the
sound reproduction device 1 is installed.
[0028]
The operation unit 4 receives various setting inputs made by the listener U at the time of
installation of the audio reproduction device 1 or the like, and outputs a signal corresponding to
the input to the system control unit 2.
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[0029]
The display unit 5 displays the content to be transmitted to the listener U based on the control
signal output from the system control unit 2.
[0030]
The beam forming unit 7 forms an audio beam of each channel based on the angle setting signal
of each channel output from the system control unit 2, and outputs an audio signal to the
speaker array 8.
[0031]
The speaker array 8 outputs an audio beam of each channel based on the audio signal output
from the beam forming unit 7.
The speaker array 8 is, as shown in FIG. 2, a plurality (n) of speakers 30 arranged in a
predetermined array such as a matrix or a line in one panel, and the beam forming unit 7 The
timing at which the surround sound is output is adjusted for each channel and emitted in a beam
shape, and delay control is performed so that the sound beam is focused at an arbitrary position
such as a wall surface.
Then, the sound of each channel is reflected on the wall of the room in which the sound
reproduction device 1 is installed, thereby creating a sound source (virtual speaker) at an
arbitrary point, and forming a sound field of multi-channel (5.1 ch) surround sound. Do.
[0032]
Next, characteristic operations of the audio reproduction device 1 according to the embodiment
of the present invention will be described.
The audio reproduction device 1 can control the beam direction and the focal length so that the
listening position of the rear channel audio is in front of the listening position of the front
channel audio, and the rear channel is automatically generated as follows. The position of the
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reflection point of the voice beam can be corrected.
[0033]
That is, when the audio reproduction device 1 is installed in a room or when the listening
position is changed, the input of the installation position information of the speaker array 8 and
the listening position information of the listener U is received by the operation unit 4 The point
at which the output angle of the sound beam of the rear channel (SLch and SRch) output to the
listener U and the sound beam are first reflected on the wall surface by the system control unit 2
(hereinafter referred to as a first reflection point). ) Calculate 50a. Subsequently, the system
control unit 2 determines whether or not the first reflection point 50a of the sound beam of the
rear channel is located in front of the listener U. Then, when the first reflection point 50a is
located in front of the listener U, the system control unit 2 is located behind the first reflection
point 50a by the calculation and is a rear channel. Sound is reflected and corrected to a position
(point 50b) that can be heard from the rear at the listening position of the listener U. In this way,
the sound beam of the rear channel reflected by the first reflection point 50b does not pass in
the vicinity of the listener U until the sound beam of the rear channel is reflected by the rear wall,
and the listener U does not pass the rear channel. It is possible to prevent the localization of the
sound from being felt forward and to allow the sound of the rear channel to be heard from
behind.
[0034]
Hereinafter, specific operations of the audio reproduction device 1 will be described. FIG. 3 is a
top view of a room in which the audio reproduction device is installed, for explaining the
operation of the audio reproduction device for correcting the emission angle of the rear channel
audio beam. Here, in FIG. 3, the room 40 in which the audio reproduction device 1 is installed is
a rectangular parallelepiped whose shape is an ideal shape so that the present invention can be
easily understood. The case where the front surface (sound emitting surface) of the speaker array
8 is installed parallel to the front wall 41 at the wall near the center will be described. Further, in
FIG. 3, the direction parallel to the front wall 41 and the speaker array 8 is the x-axis direction,
the direction perpendicular to the front wall 41 and the speaker array 8 is the y-axis direction,
and the center of the speaker array 8 is the coordinate origin o (0 , 0). The direction from the
origin o to the right wall 44 is a positive direction on the x axis, and the direction from the origin
o to the rear wall 43 is a positive direction on the y axis.
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[0035]
When installing the audio reproduction device 1 in the room 40, the listener U must move from
the front of the speaker array 8 to the rear wall 43 at the installation position of the audio
reproduction device 1 (near the center of the wall or the corner of the room). Distance L, width
W of the room, distance P from the front of the speaker array 8 to the listening position
(listening position) 51, distance M from the center (origin) of the speaker array 8 to the left wall
42, from the floor of the speaker array 8 The height H and the like of the are input from the
operation unit 4. The system control unit 2 (sound source position calculation correction
processing unit 12) of the audio reproduction device 1 determines the shape of the room in
which the audio reproduction device 1 is installed based on the data received by the operation
unit 4 and The emission angle of the sound beam of the channel (SLch, SRch) is calculated.
[0036]
That is, the emission angle θsl of SLch = Arctan (Ysl / Xsl) The emission angle θr of SRch =
Arctan (Ysr / Xsr) Note that Xsl = 2 * (− M), Ysl = 2 * L−P Xsr = 2 * (W −M), Ysr = 2 * L−P.
[0037]
Subsequently, the system control unit 2 (sound source position calculation correction processing
unit 12) calculates the distance R in the y-axis direction from the front surface of the speaker
array 8 to the first reflection point 50a of the sound beam of the rear channel It is determined
whether or not the first reflection point 50a is positioned ahead of the other.
That is, it is determined whether or not distance P> distance R.
[0038]
Here, the distance P is as follows. That is, y coordinate Rsl = -M * tanθsl = -M * (Ysl / Xsl) of the
first reflection point of SLch y coordinate Rsr = -M * tanθsr = (W-M) * (Ysr) of the first reflection
point of SRch / Xsr) Then, the system control unit 2 (sound source position calculation correction
processing unit 12), when the first reflection point 50a of this SLch, SRch is located in front of
the listening position P (in the case of distance P> distance R) Then, the first reflection point is
corrected to a position behind the position calculated by the calculation and at a position where
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the sound of the rear channel is reflected and can be heard from just beside or behind at the
listening position of the listener U. For example, the first reflection point 50b is set at the
intersection P of the plane parallel to the front of the speaker array at the listening position and
the side wall of the listener U, that is, at the position of the distance P in the y-axis direction. In
this case, the voice beam of SLch and SRch is applied to the virtual listening position (listening
position of the sound of the rear channel) 52 ahead (the speaker array 8 side) of the actual
listening position (listening position of the sound of the front channel) 51 It will be the same as
emitting. That is, the listening position 52 of the sound of the rear channel is set in front of the
listening position 51 of the sound of the front channel. At this time, the emission angles of the
SLch and SRch sound beams are as follows. Ejection angle of SLch after correction θcsl = Arctan
(P / (− M)) Emittance angle of SRch after correction θcsr = Arctan (P / (W−M)) The position
50b of the first reflection point after correction is Preferably, it is set on the intersection of the
plane parallel to the front of the speaker array at the listening position of the listener U and the
side wall of the listener U, or on the rear side of the room than that position. The focus position
of the rear channel sound beam may be set to a position where the rear channel sound beam is
diffused near the listening position 51 so that the listener U can surely hear the rear channel
sound.
[0039]
Thus, by correcting the position of the first reflection point of the sound beam in the rear
channel, it is possible for the listener U's Passage in the vicinity is eliminated, and the listener U
can be prevented from feeling the localization of the rear channel sound in the front, and the
sound of the rear channel can be made to be heard from right to left.
[0040]
Here, since the path of the sound beam is represented by a straight line in FIG. 3, it seems that
the sound beam does not reach the listening position 51 by correcting the position of the first
reflection point, but actually the sound beam Has a constant diameter and there is also a
component that reflects in the direction of the listening position 51 when reflected by the rear
wall 43, so that the listener U can listen to the sound of the rear channel at the listening position
51 at a certain volume.
However, since most of the rear channel sound beam is reflected in the direction of the virtual
listening position 52, it is difficult to say that the volume of the rear channel sound is
appropriate. Therefore, when correcting the first reflection point of the rear channel sound beam,
the volume level of the rear channel sound beam may be corrected so as to rise by a certain
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amount at the time of emission. As a result, the volume of the rear channel reaching the listener
can be set to an appropriate value, and the listener U can enjoy the optimized surround sound.
The amount by which the sound volume level of the sound beam is raised may be adjusted
according to the distance between the reflection point of the sound beam of the rear channel on
the rear wall 43 and the listening position 51. Alternatively, the proper value set in advance may
be stored in the storage unit 3 of the audio reproduction device 1, and the proper value may be
read out from the storage unit 3 and set when correcting the position of the first reflection point.
[0041]
Next, when installing the audio reproduction device 1, the position correction operation of the
first reflection point of the audio beam of the rear channel will be described based on a
flowchart. FIG. 4 is a flowchart for explaining the operation when the audio reproduction
apparatus executes the audio beam setting mode.
[0042]
The audio reproduction device 1 is installed at a desired position of the listener U in the room,
and when the position information is not set, the installation position of the audio reproduction
device 1 (around the center of the wall, A corner of a room), a distance L from the front of the
speaker array 8 to the rear wall 43, a width W of a room in which the audio reproduction device
1 is installed, a distance P from the front of the speaker array 8 to a listening position (listening
position) 51, The display unit 5 displays contents prompting the user to input the distance M
from the center (origin) of the speaker array 8 to the left wall 42 from the operation unit 4 (s1),
and until the information is input, the display unit 5 Continue to display (s2). The listener
operates the operation unit 4 according to the contents displayed on the display unit 5 to input
each information.
[0043]
When the sound source position calculation correction processing unit 12 of the system control
unit 2 detects that the installation position information of the audio reproduction device 1 and
the listening position information of the listener have been input from the operation unit 4, based
on these data, The emission angle of the sound beam of the channel (SLch, SRch) is calculated
(s3). Subsequently, the sound source position calculation correction processing unit 12 calculates
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the distance R in the y-axis direction from the first reflection point of the sound beam of the rear
channel to the front surface of the speaker array 8 (s4). It is determined whether the reflection
point is located forward, that is, whether the distance P> the distance R is satisfied (s5).
[0044]
When the distance P> the distance R, the sound source position calculation correction processing
unit 12 places the first reflection point behind the position calculated by the calculation, and the
sound of the rear channel is reflected and the listener U In the listening position, the first
reflection point is corrected to a position where it can be heard from right beside to the rear, that
is, a position including a listening position and parallel to the front surface of the speaker array 8
intersects the left wall 42 and the right wall 44 (s6). Subsequently, the emission angle of the
sound beam of the front channel (Cch, Lch, Rch) is calculated, and the emission angle information
of the sound beam of each channel is output to the storage unit 3 and stored in the storage unit
3 (s7) .
[0045]
As described above, according to the present invention, the emission angle of the sound beam of
the rear channel can be easily and quickly corrected in the sound reproduction apparatus, and
the optimum surround environment can be set according to the listening position.
[0046]
In the above description, the case where the room 40 in which the audio reproduction device 1 is
installed is a rectangular parallelepiped having an ideal shape, and the audio reproduction device
1 is installed in the vicinity of the center of the front wall 41 of the room 40 However, the
present invention is not limited to this, and the present invention can be applied even when
installed at another offset position.
[0047]
Further, in the sound reproducing apparatus 1, not only the emission angle of the sound beam of
the rear channel is automatically corrected as described above, but the listener operates the
operation unit 4 to manually output the emission angle of the sound beam of the rear channel.
Can be corrected (adjusted).
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For example, when it is desired to finely adjust the emission angle of the sound beam of the rear
channel automatically corrected by the sound reproduction device 1, the sound of the rear
channel is localized at the listener's favorite position by operating the operation unit 4 be able to.
[0048]
FIG. 1 is a block diagram showing a schematic configuration of an audio reproduction device
according to an embodiment of the present invention.
It is a layout of a speaker array. It is a top view of the room which installed the audio | voice
reproduction apparatus, Comprising: It is a figure for demonstrating the operation | movement
which an audio | voice reproduction apparatus corrects the radiation angle of the audio | voice
beam of a rear channel. It is a flowchart for demonstrating the operation | movement at the time
of an audio | voice reproduction apparatus performing audio | voice beam setting mode. It is a
top perspective view of the room which installed the speaker apparatus of patent documents 1.
Explanation of sign
[0049]
1-voice reproduction apparatus 2-system control unit 3-storage unit 4-operation unit 5-display
unit 6-multi-channel input 7-beam forming unit 8-speaker array 11-user I / F processing unit 12sound source position calculation correction Processing unit 13-Beam control processing unit
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