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JP2008193393

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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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2008193393
An audio reproduction apparatus such as a CD player having left and right speakers is installed
behind a listener to reproduce sound normally and appropriately. A sound reproduction device
10 is a CD player and has a left speaker 11L and a right speaker 11R. When the sound
reproducing apparatus 10 is installed in front of the listener 1 to listen to music, an audio signal
of the left channel is supplied to the left speaker 11L and an audio signal of the right channel is
supplied to the right speaker 11R. When the sound reproducing apparatus 10 is installed directly
behind the listener 1 to listen to music, an audio signal of the left channel is supplied to the right
speaker 11R and an audio signal of the right channel is supplied to the left speaker 11L. . Instead
of switching the supply of the audio signal to the left speaker 11L and the right speaker 11R, the
sound image localization process for the audio signal of the left channel and the right channel
may be switched. [Selected figure] Figure 1
Sound reproduction system, sound reproduction method, and audiovisual reproduction method
[0001]
The present invention relates to an audio reproduction system, an audio reproduction method,
and an audiovisual reproduction method.
[0002]
In a CD (Compact Disc) player equipped with left and right speakers, an FM radio receiver, a
cassette player, etc., the sound of the left channel of the two-channel stereo is output from the
left speaker, and the sound of the right channel is output from the right speaker.
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1
[0003]
The same applies to a flat-screen television receiver in which speakers are provided on the left
and right of a display such as a liquid crystal display.
[0004]
On the other hand, in the case of reproducing the sound by the speaker, it is considered to
process the sound signal so as to localize the sound image at a position different from the
position where the speaker is actually installed, and reproduce the sound.
[0005]
For example, according to Patent Document 1 (Japanese Patent Application Laid-Open No. 10224900), audio signals supplied to left and right rear speakers installed at a position close to the
rear of the listener are slightly behind the side of the listener It is shown that the sound image is
processed to be localized at the position and supplied to the left and right rear speakers.
[0006]
The prior art documents mentioned above are as follows.
Japanese Patent Application Laid-Open No. 10-224900
[0007]
As described above, on the premise that the CD player having left and right speakers is installed
on the front side of the listener, the sound of the left channel is reproduced by the left speaker,
that is, the front left speaker as viewed from the listener. The sound of the right channel is
reproduced by the right speaker, ie the front right speaker as viewed from the listener.
[0008]
However, there are cases where it is desirable to install a sound reproduction device provided
with such left and right speakers behind a listener to reproduce sound.
[0009]
For example, a sound reproduction apparatus provided with left and right speakers is installed
09-05-2019
2
directly behind the listener to reproduce the sound of the rear channel in the 5.1 channel
surround sound.
[0010]
In this case, the left speaker of the sound reproduction device is located to the rear right of the
listener and points forward, and the right speaker of the sound reproduction device is positioned
on the left rear of the listener and points forward.
[0011]
Therefore, the audio signal of the left channel is supplied to the left speaker, the audio signal of
the right channel to the right speaker, and so on. The audio signal of the rear left channel is
supplied to the left speaker, and the audio signal of the rear right channel is supplied to the right
speaker Then, the sound of the rear left channel is output from the rear right of the listener, and
the sound of the rear right channel is output from the rear left of the listener.
[0012]
It is the same as when installing the above-mentioned CD player behind a listener and listening to
the music of CD for convenience of an installation location etc.
[0013]
Therefore, according to the present invention, a sound reproducing apparatus having left and
right speakers is installed on the back side of a listener or the like so that normal and appropriate
sound reproduction can be realized even when sound is reproduced. is there.
[0014]
The sound reproduction system according to the present invention is a sound reproduction
system which reproduces sound of left and right channels by a sound reproduction apparatus
having a left speaker and a right speaker, and the above-mentioned sound reproduction
apparatus is installed on the front side of a listener In the first sound reproduction mode in the
case and the second sound reproduction mode in the case where the sound reproduction device
is installed behind the listener, supply of audio signals to the left speaker and the right speaker,
or Sound image localization processing for audio signals of the left and right channels is
characterized by being switched.
[0015]
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3
In the above-described sound reproduction system, the sound reproduction apparatus is installed
on the front side of the listener, and it is a matter of course that the sound reproduction
apparatus is installed behind the listener in the case where the sound is reproduced in the first
sound reproduction mode. Thus, normal and appropriate sound reproduction is realized also
when sound is reproduced in the second sound reproduction mode.
[0016]
As described above, according to the present invention, normal and appropriate sound
reproduction can be realized even when sound is reproduced by installing a sound reproduction
device having left and right speakers behind a listener or the like. .
[0017]
[1.
First Embodiment: FIGS. 1 and 2] FIGS. 1 (A) and (B) show an example of a sound reproduction
system of the present invention and a sound reproduction method according to the sound
reproduction system.
[0018]
The sound reproduction system of this example is constituted by a sound reproduction apparatus
10.
The sound reproduction device 10 has a left speaker 11L and a right speaker 11R, and is a CD
player or the like described later.
[0019]
However, as shown in FIG. 1A, the left speaker 11L and the right speaker 11R are located in front
of the listener 1 when the sound reproduction device 10 is installed on the front side of the
listener 1 and the user listens to audio. The one located is the left speaker 11L, and the one
located forward to the right of the listener 1 is the right speaker 11R.
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[0020]
The left speaker 11L and the right speaker 11R are independent and do not have an enclosure
(speaker box).
[0021]
On the front surface of the sound reproduction apparatus 10, for example, an LED (light emitting
diode) 12 for indicating a sound reproduction mode is provided in the vicinity of the right
speaker 11R as described later.
[0022]
FIG. 2 shows an example of the configuration of the sound reproduction device 10. As shown in
FIG.
This example is a case where the sound reproduction device 10 is a CD player.
[0023]
Specifically, in the sound reproduction apparatus 10, the optical pickup 14 reads data from the
CD 13, the reproduction / demodulation circuit 15 reproduces / demodulates the data, and the
stereo demodulation circuit 16 performs stereo demodulation of the data to generate a stereo
demodulation circuit. From 16, the audio signal SL of the left channel and the audio signal SR of
the right channel are output.
[0024]
Further, the audio signal SL of the left channel is amplified by the audio amplifier circuit 17L and
supplied to the switch circuits 18L and 18R, and the audio signal SR of the right channel is also
amplified by the audio amplifier circuit 17R. It is supplied to the 18R.
[0025]
Then, the audio signal of the output of the switch circuit 18L is supplied to the left speaker 11L,
and the audio signal of the output of the switch circuit 18R is supplied to the right speaker 11R.
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[0026]
The operation unit 21 instructs reproduction and stop of reproduction, and switches the sound
reproduction mode as described later.
[0027]
The controller 22 controls the regeneration demodulation circuit 15, the stereo demodulation
circuit 16, the LED lighting circuit 19, and the like to switch between the switch circuits 18L and
18R.
[0028]
As shown in FIG. 1 (A), the listener 1 operates the operation unit 21 to listen to the music
recorded on the CD 13 in the state where the sound reproducing apparatus 10 is installed on the
front, as described below. Choose a sound playback mode like this.
[0029]
That is, at this time, the controller 22 supplies the audio signal SL of the left channel to the left
speaker 11L and the audio signal SR of the right channel right of the switch circuits 18L and
18R, as opposed to the state shown in FIG. And the LED 12 is turned on by the LED lighting
circuit 19.
[0030]
Therefore, at this time, the audio signal SL of the left channel is supplied to the left speaker 11L,
and the audio signal SR of the right channel is supplied to the right speaker 11R, as shown in FIG.
1A. The left speaker 11L, located at the left, outputs the audio AL of the left channel, and the
right speaker 11R located at the front right of the listener 1 outputs the audio AR of the right
channel.
At this time, the LED 12 is turned on.
[0031]
On the other hand, as shown in FIG. 1 (B), when listening to the music recorded on the CD 13
with the sound reproducing apparatus 10 installed right behind, the listener 1 operates the
operation section 21 to Select the sound playback mode as follows.
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[0032]
That is, at this time, as shown in FIG. 2, the controller 22 supplies the audio signal SL of the left
channel to the right speaker 11R and the audio signal SR of the right channel to the left speaker
11L as shown in FIG. Switches the LED 12 to the off state.
[0033]
Therefore, at this time, the audio signal SL of the left channel is supplied to the right speaker
11R, and the audio signal SR of the right channel is supplied to the left speaker 11L, and as
shown in FIG. From the right speaker 11R located at the left, the audio AL of the left channel is
output, and from the left speaker 11L located at the rear right of the listener 1, the audio AR of
the right channel is output.
[0034]
As described above, in this example, not only when the sound reproducing apparatus 10 is
installed in front of the listener 1, but also when the sound reproducing apparatus 10 is installed
directly behind the listener 1, the left channel and The sound of the right channel is played back
normally.
[0035]
Furthermore, in the case where the sound reproducing apparatus 10 is installed at a position
close to the listener 1 directly behind the listener 1 as shown in FIG. 1B to reproduce the sound,
leakage of sound to the surroundings may be reduced. it can.
In particular, by not providing the enclosure for the left speaker 11L and the right speaker 11R,
it is possible to further reduce the leakage of the bass which is likely to sound as compared to the
middle high tone.
[0036]
The example of FIG. 2 is a case where the switch circuits 18L and 18R switch the supply of the
audio signals SL and SR to the left speaker 11L and the right speaker 11R, but switching the
sound image localization process equivalently the same. It can also be configured to do.
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[0037]
Specifically, in this case, without providing the switch circuits 18L and 18R, the left channel
audio signal SL and the right channel audio signal SR from the stereo demodulation circuit 16 are
respectively transmitted through the sound image localization processing circuit to the left
speaker 11L and the right speaker. Supply to 11R.
[0038]
Then, when the sound reproduction mode as shown in FIG. 1A is selected, in the above-described
sound image localization processing circuit, for example, sound image localization with respect to
the sound signal SL of the left channel and the sound signal SR of the right channel, in particular.
On the other hand, when the sound reproduction mode as shown in FIG. 1 (B) is selected, the
above-described sound image localization processing circuit does not perform processing on the
left channel audio signal SL. The sound image is localized at the position, for example, the front
left position, and the sound signal is localized at the right position of the listener 1, for example,
the front right position, for the sound signal SR of the right channel.
[0039]
The sound reproduction device 10 is not limited to the CD player as shown in the example of FIG.
2, but may be a stereo reproduction device such as an FM radio receiver or a cassette player.
[0040]
In addition, as an audio reproduction system, a stereo reproduction apparatus such as a CD
player and an audio reproduction apparatus having a left speaker and a right speaker are
provided, and from the stereo reproduction apparatus by wireless communication between the
stereo reproduction apparatus and the audio reproduction apparatus. It may be a system in
which sound signals of the left channel and the right channel are transmitted to the sound
reproduction device.
[0041]
[2.
Second Embodiment: FIGS. 3 to 6] FIG. 3 shows an example of a video and audio reproduction
system for executing the video and audio reproduction method of the present invention.
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8
[0042]
The video and audio reproduction system of this example includes a flat-screen television
receiver 30, a sound reproduction apparatus 10, a DVD player 40, a CD player 50, a transmission
apparatus 60, and a reception apparatus 70.
[0043]
The flat screen television receiver 30 is installed in front of a listener (viewer), the DVD player
40, the CD player 50 and the transmission device 60 are installed near the flat screen television
receiver 30, and the sound reproduction device 10 is described later. The receiver 70 is installed
near the listener directly behind the listener or in front of the listener as in the above, and the
receiver 70 is installed near the sound reproducer 10 or configured integrally with the sound
reproducer 10 .
[0044]
The flat television receiver 30 is provided with a left speaker 31L and a right speaker 31R on the
left and right of a panel-like display 33 such as a liquid crystal display or on the lower side of the
display 33.
[0045]
The sound reproduction device 10 has a left speaker 11L and a right speaker 11R.
Also in this case, the left speaker 11L and the right speaker 11R are independent and do not
have an enclosure.
[0046]
The sound reproduction device 10 may be one that can obtain an audio signal inside, such as a
CD player shown in FIG. 2 as described later, but in the example of FIG. 3, an audio signal can not
be obtained internally; An audio signal is transmitted from
[0047]
The DVD player 40 reproduces a video signal and a 5.1 channel surround audio signal from a
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9
DVD (Digital Versatile Disc).
[0048]
The video output of the DVD player 40 is sent to the flat screen television receiver 30, and the
video of the DVD is displayed on the display 33 of the flat screen television receiver 30.
[0049]
The audio output of the DVD player 40 is, for example, an optical signal in which audio signals of
all channels are transmitted to the transmission device 60, but as described later, audio signals of
some channels may be thin It is also sent to the machine 30.
[0050]
The stereo audio signal output from the CD player 50 is sent to the transmitting device 60.
The stereo audio signal or monaural audio signal of the television is also sent from the flat screen
television receiver 30 to the transmitter 60.
[0051]
In the transmitting device 60, the audio selection processing circuit 61 selects audio signals of all
channels or a part of channels in the audio output of the DVD player 40, and further performs
processing such as sound image localization processing on the selected audio signals. Will be
applied.
[0052]
Further, in the transmission device 60, the audio selection processing circuit 62 selects the audio
output of the CD player 50 or the audio output of the television, and further performs processing
such as sound image localization processing on the selected audio signal. .
[0053]
Further, in the transmitting device 60, the switching circuit 63 switches between the output of
the audio selection processing circuit 61 and the output of the audio selection processing circuit
62, and the audio signal after the switching is received by the transmitting / receiving circuit 64
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10
from the antenna 65. It is sent to the device 70.
[0054]
Further, in the transmitting device 60, the command transmitted from the receiving device 70 as
described later is received by the transmitting and receiving circuit 64 through the antenna 65
and taken into the controller 66, and from the controller 66 based on the operation of the
operation unit 67. The obtained command is transmitted from the antenna 65 to the reception
device 70 by the transmission / reception circuit 64.
[0055]
In the receiving device 70, the audio signal transmitted from the transmitting device 60 as
described above is received by the transmitting / receiving circuit 74 through the antenna 75,
processed by the audio processing circuit 73, and the left speaker of the sound reproducing
device 10 as described later. 11L and the right speaker 11R.
[0056]
Further, in the receiving device 70, a command obtained from the controller 76 based on the
operation in the operation unit 77 is transmitted from the antenna 75 to the transmitting device
60 by the transmitting and receiving circuit 74, and transmitted from the transmitting device 60
as described above. The command thus received is received by the transmission / reception
circuit 74 through the antenna 75 and taken into the controller 76.
[0057]
In the video and audio reproduction system of this example, by selecting the video and audio
reproduction method with the operation unit 77 of the reception device 70 or the operation unit
67 of the transmission device 60, the image and sound are reproduced as shown in the following
examples. be able to.
[0058]
(2−1.
First Example of Video and Audio Reproduction Method: FIG. 4) In the first example, when
viewing the video and audio of a DVD by the video and audio reproduction system of the example
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11
of FIG. 3, as shown in FIG. The voice of the rear channel is reproduced by the right speaker 11R
and the left speaker 11L of the sound reproducing apparatus 10.
[0059]
Specifically, in this case, the audio signal of the front left channel and the audio signal of the
front right channel in the 5.1 channel surround audio signal from the DVD player 40 of FIG. The
sound FL supplied to the right speaker 31R is output from the left speaker 31L as shown in FIG.
4, and the sound FR from the front right channel is output from the right speaker 31R.
[0060]
At the same time, the audio signal of the rear left channel and the audio signal of the rear right
channel in the 5.1 channel surround audio signal from the DVD player 40 are selected by the
audio selection processing circuit 61 of the transmission device 60, and The signal is supplied to
the transmission / reception circuit 64, transmitted from the transmission device 60 to the
reception device 70, and received by the transmission / reception circuit 74 of the reception
device 70.
[0061]
Further, the audio signal of the rear left channel and the audio signal of the rear right channel
are supplied to the right speaker 11R of the sound reproduction device 10 by the audio
processing circuit 73 of the receiving device 70, and the rear right The audio signal of the
channel is supplied to the left speaker 11L of the sound reproduction device 10, and as shown in
FIG. 4, the audio RL of the rear left channel is output from the right speaker 11R located behind
the listener 1 The sound RR of the rear right channel is output from the left speaker 11L located
to the rear right of the listener 1.
[0062]
Further, the audio signal of the center channel in the 5.1 channel surround audio signal from the
DVD player 40 is supplied to the center speaker omitted in FIGS. 3 and 4, and the audio signal of
the LFE (Low Frequency Effect) channel is The sound of the center channel is supplied from the
center speaker to the subwoofer speaker omitted in FIGS. 3 and 4, and the sound of the LFE
channel is output from the subwoofer speaker.
[0063]
Therefore, in this example, the sound of the rear channel can be normally reproduced by the
sound reproduction device 10.
09-05-2019
12
[0064]
Also in this example, the audio signal of the rear left channel is processed by the audio selection
processing circuit 61 of the transmission device 60 so that the sound image is localized at the
position of the rear left of the listener 1 and the left speaker of the sound reproduction device 10
The audio signal of the right rear channel supplied to 11 L is processed by the audio selection
processing circuit 61 of the transmission device 60 so that the sound image is localized at the
position of the rear right of the listener 1, and the sound reproduction device 10 is It may be
supplied to the speaker 11R.
[0065]
When the sound reproducing apparatus 10 includes a signal source of a stereo audio signal such
as a CD player shown in FIG. 2, as shown in FIG. In the state where the sound reproduction
device 10 is installed directly behind the listener 1 as shown in FIG. The sound can be
reproduced by switching to the sound reproduction mode for reproducing the sound of.
[0066]
When the sound reproducing apparatus 10 is installed directly behind the listener 1 as shown in
FIG. 4, the sound signal of the LFE channel in the 5.1 channel surround sound signal is not the
subwoofer speaker but the sound reproducing apparatus. Reproduction may be performed by the
left speaker 11L and the right speaker 11R of ten.
Thus, the listener 1 who is in the vicinity of the sound reproduction device 10 by reproducing the
low frequency sound signal such as the sound signal of the LFE channel with the speaker having
no enclosure as described above of the sound reproduction device 10, As well as being able to
listen to low-range sounds with a sufficiently low-pitched feeling, it is possible to make people
who are not in the vicinity of the sound reproduction device 10 less aware of low-pitched sound
leakage.
[0067]
(2−2.
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13
Second Example of Video and Audio Reproduction Method: FIG. 5) In the second example, when
viewing the video and audio of the DVD by the video and audio reproduction system of the
example of FIG. 3, as shown in FIG. Are placed near the listener 1 on the front of the listener 1,
and the sound of all channels is reproduced by the left speaker 11L and the right speaker 11R of
the sound reproduction device 10.
[0068]
That is, in this case, the thin television receiver 30 only displays the video of the DVD on the
display 33, and does not output sound from the left speaker 31L and the right speaker 31R.
[0069]
At the same time, the audio selection processing circuit 61 of the transmission device 60 selects
the audio signals of all channels from the 5.1 channel surround audio signal from the DVD player
40 of FIG. And transmitted from the transmitting device 60 to the receiving device 70 and
received by the transmitting / receiving circuit 74 of the receiving device 70.
[0070]
Further, the 5.1 channel surround audio signal is synthesized by the audio processing circuit 73
of the receiving device 70 with the audio signals of all the channels, and the synthesized audio
signal becomes the left speaker 11 L and the right speaker of the sound reproducing device 10.
The signal is supplied to 11R, and as shown in FIG. 5, the synthesized voice MA is output from
the left speaker 11L and the right speaker 11R.
[0071]
In this example, when watching the video and audio of the DVD, the video is viewed on the large
screen of the flat-screen television receiver 30 remote from the listener 1, and the audio is heard
by the audio reproduction device 10 close to the listener 1. Can.
[0072]
Therefore, the listener 1 can hear the sound even if his ear is far, and can reduce the leakage of
sound to the surroundings.
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In particular, by making the left speaker 11L and the right speaker 11R of the sound
reproduction device 10 not have an enclosure, it is possible to further reduce the leakage of the
bass that sounds more easily than the middle-high tone.
[0073]
Further, since the sound reproducing apparatus 10 is used near the listener 1, the output power
of the left speaker 11L and the right speaker 11R can be reduced, and the sound reproducing
apparatus 10 can be driven by a battery, as shown in FIG. As shown in the example of (1), audio
signals and commands can be transmitted and received wirelessly between the signal source side
and the sound reproducing apparatus 10 side.
[0074]
Even when the sound reproducing apparatus 10 is installed at a position close to the listener 1 in
front of the listener 1 as shown in FIG. 5, the audio signal of the LFE channel in the above 5.1
channel surround audio signal is Instead of the speakers, reproduction may be performed by the
left speaker 11L and the right speaker 11R of the sound reproduction device 10.
Thus, the listener 1 who is in the vicinity of the sound reproduction device 10 by reproducing the
low frequency sound signal such as the sound signal of the LFE channel with the speaker having
no enclosure as described above of the sound reproduction device 10, As well as being able to
listen to low-range sounds with a sufficiently low-pitched feeling, it is possible to make people
who are not in the vicinity of the sound reproduction device 10 less aware of low-pitched sound
leakage.
[0075]
(2−3.
Third Example of Video and Audio Reproduction Method: FIG. 6) In the third example, when
viewing video and audio of a television by the video and audio reproduction system of the
example of FIG. 3, as shown in FIG. Is installed at a position close to the listener 1 in front of the
listener 1, and the sound of the television is reproduced by the left speaker 11L and the right
speaker 11R of the sound reproduction device 10.
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[0076]
That is, in this case, the flat-screen television receiver 30 only displays the video of the television
on the display 33, and does not output sound from the left speaker 31L and the right speaker
31R.
[0077]
At the same time, in the transmitting device 60 of FIG. 3, the audio signal of the television is
selected by the audio selection processing circuit 62, supplied to the transmitting / receiving
circuit 64 through the switching circuit 63, transmitted from the transmitting device 60 to the
receiving device 70, and received. The signal is received by the transmission / reception circuit
74 of the device 70.
[0078]
Furthermore, when the television audio signal is a stereo audio signal, the audio processing
circuit 73 of the receiving device 70 supplies the audio signal of the left channel to the left
speaker 11L of the sound reproduction device 10, and the audio signal of the right channel is
The sound of the left channel is output from the left speaker 11L, and the sound of the right
channel is output from the right speaker 11R.
[0079]
Further, when the audio signal of the television is a monaural audio signal, the monaural audio
signal is supplied to the left speaker 11L and the right speaker 11R of the sound reproduction
device 10 by the audio processing circuit 73 of the receiving device 70. A monaural sound is
output from the 11L and the right speaker 11R.
[0080]
In this example, when viewing the video and audio of the television, the video is viewed on the
large screen of the flat-screen television receiver 30 remote from the listener 1 and the audio is
heard by the audio reproduction device 10 close to the listener 1 Can.
[0081]
Therefore, the listener 1 can hear the sound even if his ear is far, and can reduce the leakage of
09-05-2019
16
sound to the surroundings.
In particular, by making the left speaker 11L and the right speaker 11R of the sound
reproduction device 10 not have an enclosure, it is possible to further reduce the leakage of the
bass that sounds more easily than the middle-high tone.
[0082]
The video and audio reproduction method as in the third example can also be performed, for
example, when listening to the music of a CD instead of the voice of the television as the audio
while watching the video of the television.
[0083]
Specifically, in this case, as described above, in the flat-screen television receiver 30, only the
video of the television is displayed on the display 33, and the audio is not output from the left
speaker 31L and the right speaker 31R.
[0084]
At the same time, in the transmitting device 60 of FIG. 3, the stereo audio signal of the output of
the CD player 50 is selected by the audio selection processing circuit 62 and supplied to the
transmitting / receiving circuit 64 through the switching circuit 63. The signal is transmitted and
received by the transmission / reception circuit 74 of the reception device 70.
[0085]
Furthermore, the audio processing circuit 73 of the receiving device 70 supplies an audio signal
of the left channel to the left speaker 11L of the sound reproducing device 10 and an audio
signal of the right channel to the right speaker 11R of the sound reproducing device 10 The left
speaker 11L outputs sound of the left channel, and the right speaker 11R outputs sound of the
right channel.
[0086]
Therefore, the video of the television can be viewed on the large screen of the flat-screen
television receiver 30 remote from the listener 1, and the music of the CD can be heard by the
sound reproducing apparatus 10 close to the listener 1.
09-05-2019
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[0087]
It is a figure which shows the sound reproduction method by an example of the sound
reproduction system of this invention.
It is a figure showing an example of the sound reproduction device which constitutes the sound
reproduction system of this invention.
It is a figure which shows an example of the video sound reproduction system of this invention.
It is a figure which shows the 1st example of the video sound reproduction method by the video
sound reproduction system of the example of FIG.
It is a figure which shows the 2nd example of the video sound reproduction method by the video
sound reproduction system of the example of FIG.
It is a figure which shows the 3rd example of the video sound reproduction method by the video
sound reproduction system of the example of FIG.
Explanation of sign
[0088]
The main parts are all described in the figure, so they are omitted here.
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