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JP2001128283

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2001128283
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker output switching control method and apparatus for switching speakers in a surround AV
(audio / video) apparatus having a plurality of monitor televisions and a plurality of speakers.
[0002]
2. Description of the Related Art As shown in FIG. 5, a conventional surround AV system of this
type is directed to a listener 20 in front of a listener 20 in a room 10 (in the A direction) to
monitor television 32. The front left speaker 34 is located at the left side of the monitor
television 33, and the front right speaker 35 and the monitor television 33 are located at the
right side of the monitor television 33. The center speaker 36 at the back side position, the
subwoofer speaker 37 at the right position of the front right speaker 35, and the surround left
speaker 38 at the position substantially facing the front left speaker 34 with the listener 20
therebetween A surround right speaker 39 is disposed at a position substantially facing the
speaker 35.
[0003]
In order to drive each of these speakers 34,..., The speaker 39, as shown in FIG. 6, for example,
compressed audio data encoded by an audio signal as a source, for example, encoded by a Dolby
AC-3 encoder 6 channels of audio data received by the digital signal processing circuit 50,
decoded by the AC-3 decoder 51 formed in the digital signal processing circuit 50, and audio
data decoded by the AC-3 decoder 51 in the digital signal processing circuit 50 , The analog
signal from the 6-channel DAC 52 corresponding to each of the speakers 34,..., 39, the variable
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1
resistor 61,. Control the level of the analog signal supplied to the variable resistor 61,..., The
output from the variable resistor 66. Are amplified by the amplifiers 71,..., The amplifier 76, and
the outputs from the amplifiers 71,..., 76 are separately supplied to the corresponding speakers
34,. , Is configured to play acoustically.
[0004]
However, in the conventional AV apparatus as described above, when the listener 31 tries to
watch the monitor television 32 or the monitor television 33 having a screen configuration, the
viewer tries to watch the television. Since the screen of the screen monitor television 33 needs to
be raised and lowered based on the John monitor, there is a problem that switching takes time
and time.
[0005]
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above
problems and provide a speaker output switching control method and apparatus capable of
easily switching between video and audio in synchronization.
[0006]
A speaker output switching control method according to a first aspect of the present invention is
a speaker output switching control method for switching a speaker in a surround AV system,
comprising: The second monitor television is arranged so that each screen part faces the listener
in different directions, and the front left speaker and the surround left speaker, and the front
right speaker and the surround right speaker surround the listener and surround the listener in
front of the listener. The first and second center speakers are separately provided corresponding
to the positions of the first monitor television and the second monitor television, respectively.
Selection of monitor television by the time of watching the image by the first monitor television
and the time of watching the image by the second monitor television Synchronize the audio
signals supplied to the front left speaker and the surround left speaker to the front left audio
signal and the surround left audio signal, and the audio signals supplied to the front right
speaker and the surround right speaker are the freon right audio signal and the surround right It
is characterized by switching to an audio signal and switching to supply of a center audio signal
to a center speaker on the selected monitor television side.
[0007]
According to the speaker output switching control method according to claim 1 of the present
invention, in synchronization with the selection of the monitor television, the image on the first
monitor television and the image on the second monitor television are synchronized. The audio
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2
signals supplied to the front left speaker and the surround left speaker are switched to the front
left audio signal and the surround left audio signal, and the audio signals supplied to the front
right speaker and the surround right speaker are CFC right audio signal and the surround right
audio signal In order to switch to the supply of the center audio signal to the center speaker on
the selected monitor television side, the video and the sound can be easily switched in
synchronization with each other.
[0008]
Therefore, it is not necessary to perform the up and down movement of the screen
conventionally required.
[0009]
A speaker output switching control method according to claim 2 of the present invention is a
speaker output switching control method for switching a speaker in a surround AV system,
wherein the first monitor television and the second monitor television have respective screen
portions. Are arranged to face in different directions with respect to the listener, and the front
left speaker and the surround left speaker, and the front right speaker and the surround right
speaker surround the listener, and the front and back or the side of the listener mutually The first
and second center speakers are disposed corresponding to the positions of the first monitor
television and the second monitor television, respectively, and the video from the first monitor
television is viewed. The front left speed is synchronized with the selection of the monitor
television when and when watching the picture by the second monitor television The audio signal
supplied to the left and surround left speakers is switched to the front left audio signal and the
surround left audio signal, the audio signal supplied to the front right speaker and the surround
right speaker is switched to the front right audio signal and the surround right audio signal,
Supply of center audio signal to the center speaker of the selected monitor television side of the
audio signal supplied to the first and second center speakers and subwoofer audio to the center
speaker of the unselected monitor television side It is characterized by switching to the supply of
a signal.
[0010]
According to the speaker output switching control method according to claim 2 of the present
invention, in synchronization with the selection of the monitor television, when viewing the
image by the first monitor television and when viewing the image by the second monitor
television, The audio signals supplied to the front left speaker and the surround left speaker are
switched to the front left audio signal and the surround left audio signal, and the audio signals
supplied to the front right speaker and the surround right speaker are CFC right audio signal and
the surround right audio signal Switch to the center speaker of the selected monitor television
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3
side to which the audio signal to be supplied to the first and second center speakers is supplied
and to the center speaker of the non-selected monitor television side Video and sound to be
switched to the subwoofer audio signal supply Door can be easily switched in synchronization
with each other.
[0011]
Therefore, in addition to eliminating the need for raising and lowering the screen conventionally
required, the center speaker and the subwoofer speaker are substantially shared, and the
installation space of the speakers can be reduced.
[0012]
A speaker output switching control device according to claim 3 of the present invention is a
speaker output switching control device for switching the output to the speaker in the surround
AV system, and the first monitor television and the second monitor television are each The
screen part is arranged to face the listener in different directions, and the front left speaker and
the surround left speaker, the front right speaker and the surround right speaker surround the
listener and the front and back or the side of the listener , And the first and second center
speakers are separately disposed corresponding to the positions of the first monitor television
and the second monitor television, respectively, and an image by the first monitor television The
front left in sync with the selection of the monitor television at the time of watching and when
watching the picture by the second monitor television Switch the audio signal supplied to the
speaker and surround left speaker to the front left audio signal and the surround left audio
signal, and switch the audio signal supplied to the front right speaker and the surround right
speaker to the front right audio signal and the surround right audio signal, It is characterized by
having a changeover switch of interlocking operation which switches to supply of a center sound
signal to a center speaker on a selected monitor television side.
[0013]
According to the speaker output switching control device according to the third aspect of the
present invention, in synchronization with the selection of the monitor television, the image on
the first monitor television and the image on the second monitor television are synchronized. The
audio signal supplied to the front left speaker and the surround left speaker is switched to the
front left audio signal and the surround left audio signal by the changeover switch for
interlocking operation, and the audio signal supplied to the front right speaker and the surround
right speaker is CFC right audio signal In order to switch to the surround right audio signal and
to switch to the supply of the center audio signal to the center speaker on the selected monitor
television side, the video and the audio can be easily switched in synchronization.
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[0014]
Therefore, it is not necessary to perform the up and down movement of the screen
conventionally required.
[0015]
A speaker output switching control device according to claim 4 of the present invention is a
speaker output switching control device for switching an output to a speaker in a surround AV
system, and the first monitor television and the second monitor television are each provided. The
screen part is arranged to face the listener in different directions, and the front left speaker and
the surround left speaker, the front right speaker and the surround right speaker surround the
listener and the front and back or the side of the listener , And the first and second center
speakers are separately disposed corresponding to the positions of the first monitor television
and the second monitor television, respectively, and an image by the first monitor television The
front left in sync with the selection of the monitor television at the time of watching and when
watching the picture by the second monitor television Switch the audio signal supplied to the
speaker and surround left speaker to the front left audio signal and the surround left audio
signal, and switch the audio signal supplied to the front right speaker and the surround right
speaker to the front right audio signal and the surround right audio signal, Supply of the center
audio signal to the center speaker of the selected monitor television side of the audio signal
supplied to the first and second center speakers and the subwoofer to the center speaker of the
unselected monitor television side It is characterized by having a changeover switch of
interlocking operation switched to supply of an audio signal.
[0016]
According to the speaker output switching control apparatus according to the fourth aspect of
the present invention, in synchronization with the selection of the monitor television, the image
on the first monitor television and the image on the second monitor television are synchronized.
The audio signal supplied to the front left speaker and the surround left speaker is switched to
the front left audio signal and the surround left audio signal by the changeover switch for
interlocking operation, and the audio signal supplied to the front right speaker and the surround
right speaker is CFC right audio signal It is switched to the surround right audio signal and the
monitor audio signal supplied to the first and second center speakers is selected. The center
audio signal supplied to the center speaker on the television side and the monitor television not
selected. To supply the subwoofer audio signal to John's center speaker To be Toggles, video and
audio can be easily switched synchronously.
[0017]
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5
Therefore, in addition to eliminating the need for raising and lowering the screen conventionally
required, the center speaker and the subwoofer speaker are substantially shared, and the
installation space of the speakers can be reduced.
[0018]
A speaker output switching control device according to claim 5 of the present invention is a
speaker output switching control device for switching an output to a speaker in a surround AV
system, which receives a front left audio signal to be a first front left speaker The first switching
means for switching the output to (34) and the output to the second front left speaker (39), and
the front right audio signal upon receiving the front right audio signal and the output to the first
front right speaker (35) A second switching means for switching the output of the second front
right speaker (38) and an output to the first surround left speaker (38) upon receipt of the
surround left audio signal and a second surround left speaker (35) And a third switching means
for switching between the output to the first surround right audio signal and the second
surround right speech A fourth switching means for switching the output to (34), wherein the
respective switching means is characterized by interlocking operation.
[0019]
According to the speaker output switching control device according to claim 5 of the present
invention, the first to fourth switching means are switched in conjunction with each other, and
the front left audio signal is received by the first switching means and the first switching means
is switched. The output to the front left speaker (34) and the output to the second front left
speaker (39) are switched, and the second switching means receives the front right audio signal
and receives the first front right speaker (35) Output to the second front right speaker (38), and
the third switching means receives the surround left audio signal and outputs the signal to the
first surround left speaker (38) and the second Output to the surround left speaker (35), and the
fourth switching means receives the surround right audio signal and outputs the signal to the
first surround right speaker (39) and the second surround right To be switched and output to the
speaker (34), it is no longer necessary to perform such screen raise and lower that required at
the time of switching of the television monitor.
[0020]
Further, in the speaker output switching control device according to claim 5, a center audio
signal switching means may be provided, and the center audio signal switching means may be
switched in conjunction with switching of each switching means.
[0021]
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6
BEST MODE FOR CARRYING OUT THE INVENTION A speaker output switching control method
and apparatus according to the present invention will be described below based on an
embodiment.
[0022]
FIG. 1 is a block diagram showing a configuration of a speaker output switching control
apparatus for implementing a speaker output switching control method according to an
embodiment of the present invention, and FIG. 2 is a speaker output switching control according
to an embodiment of the present invention. It is a connection diagram of an apparatus.
[0023]
The speaker output switching control apparatus according to the embodiment of the present
invention is, as schematically shown in FIG. 1, a monitor television 33 having a screen
configuration at the front and back positions of the listener 20 in the room 10 with the listener
20 therebetween. And the monitor television 32 face each other, and the listener 20 can view the
image on the screen by the monitor television 33 of the screen configuration by facing the
direction A, By turning it, the image on the monitor television 32 can be seen.
[0024]
Inside the room 10, facing in the A direction in FIG. 1, the front left speaker 34 at the left
position of the monitor television 33, the front right speaker 35 at the right position of the
monitor television 33, and the screen back position of the monitor television 33 A subwoofer
speaker 37 is disposed at a position further to the right of the center speaker 36 and the front
right speaker 35.
[0025]
Further, in the room 10, the surround left speaker 38 and the right side position of the monitor
television 32 are located at the left position of the monitor television 32 and substantially facing
the front left speaker 34 in the direction B in FIG. The surround right speaker 39 is disposed
substantially opposite to the front right speaker 35, the center speaker 40 is disposed at the back
position of the monitor television 32, and the subwoofer speaker 41 is disposed further to the
right of the surround right speaker 39.
[0026]
As described above, the monitor television 32 and the monitor television 33 are disposed so that
each screen portion faces the front side (A direction side) and the back side (B direction side) of
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7
the listener 20 with the listener 20 interposed therebetween. The front left speaker 34 and the
surround left speaker 38, the front right speaker 35 and the surround right speaker 39 surround
the listener 20 and correspond to each other on the front side (A direction side) and the back
side (B direction side) of the listener 20 The center speakers 36 and 40 are separately disposed
at the back positions of the monitor televisions 32 and 33 respectively, and the subwoofers 37
and 41 are provided on the front side (the A direction side) of the listener 20 It arranges
corresponding to each other on the back side (the B direction side).
[0027]
In order to drive these speakers 34,..., The speaker 41, as shown in FIG. 2, compressed audio data
in which an audio signal as a source is encoded is supplied to the digital signal processing circuit
50.
The AC-3 decoder 51 formed in the digital signal processing circuit 50 decodes.
The audio data decoded by the AC-3 decoder 51 is supplied to the 6-channel DAC 52 formed in
the digital signal processing circuit 50 to be converted into an analog signal, and the analog from
the DAC 52 corresponding to each of the speakers 34,. The signal is supplied to variable resistors
61,..., Variable resistor 66 to control the level of the analog signal.
The output from the variable resistor 61,..., The variable resistor 66 is amplified by the amplifier
71,..., The amplifier 76, and the switch 71,. , 86 corresponding to each speaker 34,..., The speaker
41 to reproduce the sound.
[0028]
The changeover switch 81,..., The changeover switch 86 are switched in synchronization with the
switching of the monitor television by the operation of the instruction switch in the AV center
controller 43 provided in the vicinity of the listener 20.
That is, when the listener 20 is facing in the A direction, that is, when viewing the image on the
screen of the monitor television 33, the monitor television 33 is selected and synchronized with
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8
the switching of the monitor television as shown in FIG. When the listener 20 is in the B
direction, that is, when viewing a video on the monitor television 32, the monitor television 32 is
selected and the monitor television 32 is selected. In synchronization with the switching,
switching control is performed from the contact position shown in FIG. 2 to the b contact
position.
[0029]
The a contact of the changeover switch 81 and the b contact of the changeover switch 84 are
connected to the front left speaker 34, and the b contact of the changeover switch 81 and the a
contact of the changeover switch 84 are connected to the surround right speaker 39. A front left
channel audio signal decoded by the AC-3 decoder 51 is supplied, and a surround right channel
audio signal decoded by the AC-3 decoder 51 is supplied to the changeover switch 84.
[0030]
The a contact of the changeover switch 83 and the b contact of the changeover switch 82 are
connected to the front right speaker 35, and the b contact of the changeover switch 83 and the a
contact of the changeover switch 82 are connected to the surround left speaker 38. A front right
channel audio signal decoded by the AC-3 decoder 51 is supplied, and a surround left channel
audio signal decoded by the AC-3 decoder 51 is supplied to the changeover switch 82.
[0031]
The a-contact of the changeover switch 85 is connected to the center speaker 36, the b-contact
of the changeover switch 85 is connected to the center speaker 40, and the changeover switch
85 is supplied with the center channel audio signal decoded by the AC-3 decoder 51. Yes.
The a-contact of the changeover switch 86 is connected to the subwoofer speaker 37, the bcontact of the changeover switch 86 is connected to the subwoofer speaker 41, and the
subwoofer audio signal decoded by the AC-3 decoder 51 is supplied to the changeover switch 86
It is
[0032]
The operation of the speaker output switching control apparatus according to the embodiment of
the present invention configured as described above will be described.
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9
[0033]
When the listener 20 sees an image by the monitor television 33 having a screen configuration,
the direction is A, and the instruction switch in the AV center controller 43 is operated to the A
side.
By this operation, the monitor television 32 is replaced with the monitor television 33, and the
changeover switches 81,..., The changeover switch 86 are interlocked with the contact a side in
synchronization with the switch of the monitor television.
[0034]
By this switching, the front left channel audio signal decoded by the AC-3 decoder 51 is supplied
to the front left speaker 34, and the surround left channel audio signal decoded by the AC-3
decoder 51 is supplied to the surround left speaker 38 Ru.
The front right speaker audio signal decoded by the AC-3 decoder 51 is supplied to the front
right speaker 35, and the surround right channel audio signal decoded by the AC-3 decoder 51 is
supplied to the surround right speaker 39.
The center speaker 36 is supplied with the center audio signal decoded by the AC-3 decoder 51,
and the subwoofer speaker 37 is supplied with the subwoofer audio signal decoded by the AC-3
decoder 51.
[0035]
Therefore, in this case, the front left and right speakers 34 and 35 are separately supplied with
the front left and right front audio signals, and the surround left and right speakers 38 and 39
are surround front left and right audio signals. Each of the speakers is supplied separately, the
center audio signal is supplied to the center speaker 36, the subwoofer audio signal is supplied to
the subwoofer speaker 41, and each audio is converted, and the listener 20 views the image by
the monitor television 33 of the screen configuration. You can listen to the surround theater
playback sound full of sense of presence.
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10
[0036]
When the listener 20 sees an image from the monitor television 32, the listener 20 points in the
B direction, and operates the instruction switch in the AV center controller 43 to the B side.
By this operation, the monitor television 32 is switched to the monitor television 32 and, in
synchronization with the switching of the monitor television, the changeover switches 81,...
[0037]
By this switching, the surround right channel audio signal decoded by the AC-3 decoder 51 is
supplied to the front left speaker 34, and the front right channel audio signal decoded by the AC3 decoder 51 is supplied to the surround left speaker 38 The surround left channel audio signal
decoded by the AC-3 decoder 51 is supplied to the front right speaker 35, and the front left
channel audio signal decoded by the AC-3 decoder 51 is supplied to the surround right speaker
39. The center audio signal decoded by the AC-3 decoder 51 is supplied to the speaker 40, and
the subwoofer audio signal decoded by the AC-3 decoder 51 is supplied to the subwoofer
speaker 41.
[0038]
Therefore, in this case, the surround left and right surround audio signals are separately supplied
to the front left and right speakers 34 and 35, and the front right and left audio signals are
respectively supplied to the surround left and right speakers 38 and 39. It is supplied separately,
and a center audio signal is supplied to the center speaker 40 instead of the center speaker 36,
and a subwoofer audio signal is supplied to the subwoofer speaker 41 instead of the subwoofer
speaker 37 and converted to sound, respectively. While watching the video from the television
32, it is possible to listen to the surround theater playback sound full of sense of reality.
[0039]
As described above, according to the speaker output switching control device according to the
embodiment of the present invention, even when the listener 20 faces in the A direction or in the
B direction, it synchronizes with the switching of the video. The audio signals supplied to the
corresponding speakers are switched by the changeover switch 81,..., The changeover switch 86
on the A direction side and the B direction side, so that surround theater reproduction sound
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11
with full sense of reality can be heard.
Therefore, in this case, it is not necessary to raise and lower the screen conventionally required,
and the audio signal supplied to the speaker can also be switched.
[0040]
As described above, according to the speaker output switching control device according to the
embodiment of the present invention, the interlocking of the contact a and the contact b of the
changeover switches 81 to 86 in synchronization with the switching between the monitor
televisions 33 and 32. 2, the front left audio signal and the surround left audio signal are
switched to a state in which the speakers 34 and 39 are substantially interchanged with each
other, as shown in () in FIG. As shown in (), the front right audio signal and the surround right
audio signal are switched to a state in which the speakers 35 and the speakers 38 are
substantially interchanged, and the center audio signal and the center speaker 36 are It is
switched to the state in which the center speaker 40 has been replaced, and the subwoofer
speaker 37 and the speaker 41 for the subwoofer audio signal. It will be switched to the state in
which the turnover divided by.
[0041]
Next, a modification of the speaker output switching control apparatus according to the
embodiment of the present invention will be described.
[0042]
FIG. 3 is a block diagram showing a configuration of a modification of the speaker output
switching control device according to the embodiment of the present invention, and FIG. 4 is a
modification of the speaker output switching control device according to the embodiment of the
present invention. It is a connection diagram.
In FIGS. 3 and 4, the same components as the components in the speaker output switching
control apparatus of FIGS. 1 and 2 are designated by the same reference numerals, and the
description thereof will be omitted.
[0043]
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12
In order to show that the center speakers 36 and 40 are shared with the subwoofer speakers and
the subwoofer speakers 37 and 41 in the speaker output switching control device according to
the embodiment of the present invention are omitted, the speakers are shared. In FIG. 3 and FIG.
4, they are shown by center speakers 36C and 40D.
[0044]
In order to drive each of the speakers 34, 35, 36C, 38, 39 and 40D, as shown in FIG. 4,
compressed audio data encoded with an audio signal as a source is supplied to the digital signal
processing circuit 50A, The AC-3 decoder 51 formed in the processing circuit 50 decodes.
The audio data decoded by the AC-3 decoder 51 is switched by the changeover switches 53, 54,
55 formed by the signal processing circuit 50, and supplied to the 6-channel DAC 52 formed in
the digital signal processing circuit 50 to be an analog signal , And the analog signal from the
DAC 52 corresponding to each of the speakers 34,..., 39 is supplied to the variable resistor 61,...,
The variable resistor 66 to control the level of the analog signal.
The outputs from the variable resistors 61,..., The variable resistor 66 are amplified by the
amplifiers 71,..., The amplifier 76, and the outputs from the amplifiers 71,. The sound is supplied
to each of the speakers 34, 35, 36C, 38, 39, 40D and reproduced as sound.
[0045]
Here, the changeover switches 53, 54, 55 are changeover switches operated in conjunction with
the changeover with the monitor televisions 32, 33 based on the operation of the instruction
switch in the AV center controller.
[0046]
The changeover switch 53 switches between the front left audio signal and the surround left
audio signal decoded by the AC-3 decoder 51, supplies the signal to the DAC 52, and switches to
the speakers 34 and 38 for supply.
The changeover switch 54 switches between the front right audio signal and the surround right
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13
audio signal decoded by the AC-3 decoder 51, supplies the signal to the DAC 52, and switches
the speakers 35 and 39 for supply.
The changeover switch 55 switches between the center audio signal and the subwoofer audio
signal decoded by the AC-3 decoder 51, supplies it to the DAC 52, and switches it to the speakers
36C and 40D.
[0047]
The operation of the modification of the speaker output switching control device according to the
embodiment of the present invention will be described.
[0048]
When the listener 20 sees an image by the monitor television 33 having a screen configuration,
the direction is A, and the instruction switch in the AV center controller 43 is operated to the A
side.
By this operation, the monitor television 32 is switched to the monitor television 33 in place of
the monitor television 32, and the changeover switches 53 to 55 are interlocked and switched in
synchronization with the switch of the monitor television.
[0049]
In this case, the changeover switch 53 guides the front left audio signal decoded by the AC-3
decoder 51 to the variable resistor 61, guides the surround left audio signal to the variable
resistor 62, and the changeover switch 54 operates the AC-3 decoder 51. To the variable resistor
63, and the surround right audio signal to the variable resistor 64, and the changeover switch 55
sends the center audio signal decoded by the AC-3 decoder 51 to the variable resistor 65. Lead
and lead the subwoofer audio signal to the variable resistor 66.
[0050]
As a result, by this operation, the monitor television 32 is switched to the monitor television 33
in place of the monitor television 32, and the changeover switch 53 to the changeover switch 55
are interlocked and switched synchronously with the switch of the monitor television. The front
left audio signal is supplied and reproduced, and the surround left audio signal is supplied and
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14
reproduced to the surround left speaker 38, and the front right audio signal is supplied to the
front right speaker 35 and reproduced, and the surround right speaker 39 is surround right An
audio signal is supplied and reproduced, a center audio signal is supplied and reproduced to the
center speaker 36C, and a subwoofer audio signal is supplied to and reproduced from the center
speaker 40D.
[0051]
When the listener 20 sees an image from the monitor television 32, the listener 20 points in the
B direction, and operates the instruction switch in the AV center controller 43 to the B side.
By this operation, the monitor television 32 is switched to the monitor television 32 in place of
the monitor television 33, and the changeover switches 53 to 55 are interlocked and switched in
synchronization with the switch of the monitor television.
[0052]
In this case, the changeover switch 53 guides the surround right audio signal decoded by the AC3 decoder 51 to the variable resistor 61, guides the front right audio signal to the variable
resistor 62, and the changeover switch 54 operates the AC-3 decoder 51. To the variable resistor
63 and the front left audio signal to the variable resistor 64, and the changeover switch 55 sends
the subwoofer audio signal decoded by the AC-3 decoder 51 to the variable resistor 65. Lead and
lead the center audio signal to the variable resistor 66.
[0053]
As a result, the monitor television 32 is switched to the monitor television 32 by this operation,
and the changeover switch 53 to the changeover switch 55 are interlocked and switched in
synchronization with the switch of the monitor television.
The surround right audio signal is supplied to the front left speaker 34 and reproduced, the front
right audio signal is supplied to the surround left speaker 38 and reproduced, and the surround
left audio signal is supplied to the front right speaker 35 and reproduced, the surround right The
front left audio signal is supplied to and reproduced from the speaker 39, the subwoofer audio
signal is supplied to and reproduced from the center speaker 36C, and the center audio signal is
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15
supplied to and reproduced from the center speaker 40D.
[0054]
According to the modification of the speaker output switching control device according to the
embodiment of the present invention, even when the listener 20 faces in the A direction or in the
B direction, it synchronizes with the switching of the video. The audio signals supplied to the
corresponding speakers are switched by the changeover switches 53 to 55 on the A direction
side and the B direction side, respectively, so that surround theater reproduction sound full of
reality can be heard.
Therefore, in this case, it is not necessary to raise and lower the screen conventionally required,
and the audio signal supplied to the speaker can also be switched.
[0055]
As described above, according to the modification of the speaker output switching control device
according to the embodiment of the present invention, interlocking switching with the
changeover switches 53 to 55 is synchronized with the switching between the monitor
televisions 33 and 32. Thus, as shown in () in FIG. 4, the speakers 34 and 39 alternate with each
other with respect to the front left audio signal and the surround right audio signal, and the front
right audio signal as shown in () in FIG. 4. And the surround left audio signal, the speakers 35
and the speaker 38 are interchanged, the loudspeaker 36C and the speaker 40D are
interchanged for the center audio signal, and the loudspeakers 40D and 36C are substantially
interchanged for the subwoofer audio signal. It will be switched to the broken state.
[0056]
According to the modification of the speaker output switching control device according to the
embodiment of the present invention, the installation space of the speakers 37 and 41 is
reduced, and the changeover switches 53 to 55 are formed without the digital signal processing
circuit 50A. The number of switches also decreases and becomes cheaper.
[0057]
In the speaker output switching control device according to the embodiment of the present
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invention, the monitor television is disposed at the front and back positions sandwiching the
listener. It is the same even if it sets it.
For example, if there is a monitor television 32 on the left side of the listener, the front right
audio signal is for the speaker 35 or 34, the front left audio signal is for the speaker 34 or 38,
and the surround right audio signal is the speaker 39 or The surround left audio signal may be
switched to the speaker 38 or the speaker 39 to the speaker 35.
[0058]
The speaker output switching control apparatus according to the embodiment of the present
invention has been described based on the decoder of the AC-3 signal, but the same applies to a
multi-channel decoder of another method such as DTS.
[0059]
As described above, according to the speaker output switching control method and apparatus
according to the present invention, an effect that video and audio can be switched in
synchronization easily can be obtained.
10-05-2019
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