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JP2000023281

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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
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DESCRIPTION JP2000023281
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
audio output apparatus and method for transmitting an audio related to an image displayed on a
screen to a side facing the screen using a speaker.
[0002]
2. Description of the Related Art Currently, there are several types of speaker systems capable of
reproducing real sound. One of them is a surround system using a DVD (Digital Video Disk) as a
sound source and an image source. Since this DVD system is recorded in Dolby Digital format, if
it reproduces according to Dolby Digital format, a realistic sound can be realized.
[0003]
However, this system requires a total of five speakers below the screen for displaying an image,
behind the listener, for deep bass, and for the left and right.
[0004]
Also, in a television (TV) conference system using a personal computer or a television, as shown
in FIG. 9, although the speaker of the other party of communication is shown on the screen 101a
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and speaks, its voice is usually , Speakers 102a and 103a placed on the left and right of the
screen.
FIG. 9 is a plan view of a conventional video conference system.
[0005]
Furthermore, if you do not want the voice of the other party to be heard by anyone other than
the listener 104a, or if it is annoying for the other person to output the voice, you should listen
to the voice using headphones or earphones. It was not.
[0006]
Also, in recent years, the opportunity to make a presentation such as a new project using a
personal computer has increased.
In such a case, if the screen used for the explanation is as large as possible, it can appeal to the
viewer.
[0007]
Further, when watching a video or a television in the home, it is more realistic to watch on a
screen as large as possible.
[0008]
In addition, image videos of companies and commercials of new products for business use are
displayed on a large screen at exhibitions and various shows, and the existence value thereof is to
be appealed.
Most of the large screens projected at exhibitions and various shows are configured as one large
screen by combining several large TVs. Recently, plasma displays and rear projectors have often
been used.
10-05-2019
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[0009]
In such a case, it becomes a problem how to output the sound effect together with the image
displayed on the screen. Depending on the sound effect, the effect of the image may be good or
bad.
[0010]
In general, stereo sound effects by placing speakers on the left and right of a large screen are
well known. In addition, it is also practiced to appeal to the viewer by a surround sound effect in
which sounds are heard from the front, the side, and the rear of the viewer (listener).
[0011]
However, in the case of reproduction by the above-described Dolby Digital method, the cost for
procuring the equipment becomes high, and a space for installing a large number of speakers is
required.
[0012]
Further, in the above-described video conference system, since the voices of the speaker are
output from the left and right speakers, the other party shown on the screen can not be heard as
if it is reclining and there is a sense of discomfort and lack of reality. .
[0013]
Furthermore, as a common defect of the above two systems, the person who is not related to the
outputted sound can hear the sound outputted from the speaker, which may cause the person to
feel unpleasant. is there.
[0014]
In addition, in order to prevent another person from hearing the output sound, it is necessary to
wear a headphone or the like, and the usability is very poor.
[0015]
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Further, when speakers are provided on the left and right of a large screen, a considerable space
is required.
Furthermore, in order to realize a surround sound effect, it is necessary to set a speaker in front
of the viewer and also in the rear.
As a result, more space is required, the number of viewers is limited, and this is contrary to the
original purpose of giving a presentation to many people.
Furthermore, in this case, the wiring with the installed speaker also becomes complicated, which
may lead to an increase in labor and erroneous wiring.
[0016]
Therefore, the present invention has been made focusing on the above-mentioned problems, and
it is possible to produce a realistic effect such as a speaker displayed on a screen being covered
by a small number of speakers. It is an object of the present invention to provide an audio output
device and method that can
[0017]
Also, the present invention provides an audio output apparatus and method that can make it
difficult to hear the sound generated from the speaker by anyone other than the person who
needs it and not bother other people who are not involved. For other purposes.
[0018]
Another object of the present invention is to provide an audio output apparatus and method
which allow a viewer to easily experience surround sound effects by a highly directional speaker
attached to a projector for projecting an image. Do.
[0019]
SUMMARY OF THE INVENTION In order to achieve the above object, an audio output apparatus
according to a first aspect of the present invention is an audio output device according to the
present invention, wherein an audio related to an image displayed on a screen is opposed to the
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screen. An audio output device for sending out the image, an image display unit having a screen
for displaying the image, a reflecting member provided on the screen of the image display unit
for reflecting a sound wave, and a sound wave corresponding to the sound The speaker is
disposed at a position where the sound wave generated from the speaker is reflected by the
reflection member and sent out to the side facing the screen of the image display unit.
[0020]
According to a second aspect of the present invention, in the voice output apparatus according to
the first aspect, the reflecting member converts the sound wave having directivity generated
from the speaker into a non-directional sound wave. It features.
[0021]
According to a third aspect of the present invention, in the voice output apparatus according to
the first aspect, the direction of generation of the sound wave generated from the speaker is from
the screen of the image display unit to the side facing the screen. It is characterized by
comprising switching means for selectively switching between the direction and the reverse
direction.
[0022]
According to a fourth aspect of the present invention, in the voice output device according to the
third aspect, the switching means is means for rotating the speaker.
[0023]
According to a fifth aspect of the present invention, in the voice output device according to the
first aspect, the speakers are provided in a pair on the left and right sides of the screen of the
image display unit.
[0024]
According to a sixth aspect of the present invention, in the voice output apparatus according to
the first aspect, the speaker generates a sound wave having directivity in which a 0 to 20 kHz
voice is superimposed on a 200 kHz carrier wave. It is characterized by
[0025]
According to a seventh aspect of the present invention, there is provided an audio output method
for transmitting an audio concerning an image displayed on a screen toward the side facing the
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screen, the screen of an image display section for displaying the image. A reflecting member for
reflecting a sound wave is provided thereon, and the sound wave corresponding to the sound
generated from the speaker is reflected by the reflecting member and sent out to the side facing
the screen of the image display unit. It is characterized by
[0026]
According to an eighth aspect of the present invention, there is provided the audio output
method according to the seventh aspect, wherein the reflecting member converts the sound wave
having directivity generated from the speaker into a non-directional sound wave. It features.
[0027]
According to a ninth aspect of the present invention, in the voice output method according to the
seventh aspect, the generation direction of the sound wave generated from the speaker is from
the screen of the image display unit to the side facing the screen. It is characterized in that it is
possible to selectively switch between the direction and the opposite direction.
[0028]
According to a tenth aspect of the present invention, in the audio output method according to the
seventh aspect, the speakers are provided in a pair on the left and right sides of the screen of the
image display unit.
[0029]
According to an eleventh aspect of the present invention, there is provided the audio output
method according to the seventh aspect, wherein the speaker generates a sound wave having
directivity in which an audio of 0 to 20 kHz is superimposed on a carrier of 200 kHz. It is
characterized by
[0030]
According to a twelfth aspect of the present invention, in the audio output device according to
the first aspect, the image display unit comprises a projector for projecting an image and a
screen for projecting the projected image. The speaker is attached to the projector and generates
a sound wave toward the screen.
[0031]
According to a thirteenth aspect of the present invention, there is provided the audio output
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method according to the seventh aspect, wherein the speaker attached to a projector for
projecting an image directs a sound wave toward a screen for projecting the projected image. It is
characterized by occurring.
[0032]
DETAILED DESCRIPTION OF THE INVENTION Embodiments of the audio output device and
method of the present invention will be described.
[0033]
[First Embodiment] The voice output device in this embodiment is applied to a video conference
system.
FIG. 1 is a diagram showing the configuration of a video conference system according to the first
embodiment.
In the figure, reference numeral 101 denotes an image display reflector capable of displaying an
image, having a reflector for reflecting a sound wave.
The reflection plate is made of a material that absorbs less sound waves, such as glass and
plastic.
A plasma display is used as an image display reflector having such a reflector in the present
embodiment.
[0034]
Reference numeral 102 denotes an ultrasonic speaker (hereinafter referred to as a left speaker)
for outputting highly directional ultrasonic waves placed on the left side of the listener 104, and
103 also denotes directional lights placed on the right side of the listener 104. It is an ultrasonic
speaker (hereinafter referred to as a right speaker) that outputs high ultrasonic waves.
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The ultrasonic speaker outputs, for example, an ultrasonic wave in which sound of 0 to 20 kHz is
superimposed on a carrier of 200 kHz.
[0035]
Reference numeral 105 denotes a communicating party (speaker) displayed on the image display
reflecting plate 101.
Reference numeral 106 denotes a set top box for controlling a video conference.
[0036]
Description will be made of an operation in which, when a video conference is conducted using
the video conference system having the above-described configuration, it seems that voice is
directly output from the other party (speaker) whose image is displayed.
[0037]
First, when a video conference with the communication partner 105 is started by the set top box
106, an image of the communication partner 105 is displayed on the image display reflection
plate 101.
At the same time, the voice of the communication partner 105 is output from the left speaker
102 and the right speaker 103.
At this time, the sound source output directions of the left speaker 102 and the right speaker
103 are directed to the image display reflector 101 on which the communication partner 105 is
shown.
[0038]
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FIG. 2 is a diagram showing the sound source output directions of the left and right speakers in
the TV conference system.
When the highly directional ultrasonic waves output from the left speaker 102 and the right
speaker 103 in the directions of arrows a and b in the figure are reflected by the image display
reflection plate 101, they are converted into nondirectional ultrasonic waves and the listener 104
side. I'm heading for
[0039]
Thus, the listener 104 sounds as if the voice of the communication partner 105 is directly output
from the image display reflection plate 101.
Therefore, it is possible to reduce the number of speakers as much as possible and make the
speaker displayed on the screen look as if he or she is singing.
[0040]
Second Embodiment A video conference system according to the second embodiment will be
described.
FIG. 3 is a diagram showing a state before rotation of the left and right speakers.
The figure (A) shows the state which looked at the left and right speakers from the plane, and the
figure (B) shows the state which looked at the left and right speakers from the side.
FIG. 4 is a view showing a state after rotation of the left and right speakers.
The figure (A) shows the state which looked at the left and right speakers from the plane, and the
figure (B) shows the state which looked at the left and right speakers from the side.
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The same components as those in the first embodiment are given the same reference numerals,
and the description thereof is omitted.
Also, the left speaker 102 and the right speaker 103 in the second embodiment are ultrasonic
speakers that output ultrasonic waves with high directivity as in the first embodiment.
[0041]
In the figure, reference numeral 401 denotes a pedestal rotatably supporting the speaker main
body 402, respectively.
A protection net 403 protects the sound source output surface of the speaker.
A light receiving unit 404 receives a rotation command for rotating the speaker body 402
supported by the pedestal 401.
[0042]
FIG. 5 is a block diagram showing the configuration of a control unit for controlling the rotational
operation of the left speaker 102 and the right speaker 103, respectively.
The control unit is housed in the pedestal 401. In the figure, reference numeral 601 denotes a
central processing unit (CPU); 602, a ROM storing a control program; and 603, a motor for
rotating the pedestal 401.
[0043]
FIG. 6 is a view showing the appearance of a commander for transmitting a rotation command
for rotating the left speaker 102 and the right speaker 103 by the operation of the listener 104.
As shown in FIG. In the figure, reference numeral 701 denotes a light emitting unit for
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transmitting a rotation command for rotating the speaker main body 402 supported by the
pedestal 401 by light, 702 denotes a commander main body, and 703 denotes a push button
switch used for rotating the speaker.
[0044]
Description will be made of the operation in the case where the listener 104 does not want the
person other than the listener 104 to hear the voice of the communication partner 105 when
conducting a video conference in the video conference system having the above configuration.
First, similarly to the first embodiment, the set top box 106 starts a video conference with the
communication partner 105. At this time, the listener 104 presses the speaker rotation control
push button switch 703 of the commander main body 702.
[0045]
When the push button switch 703 is pressed, the commander transmits a rotation command
from the light emitting unit 701 to the light receiving unit 404 provided on the pedestal 401.
[0046]
When the light receiving unit 404 receives a rotation command for rotating the speaker 402
supported by the pedestal 401, the received rotation command is transmitted to the central
processing unit (CPU) 601.
[0047]
A central processing unit (CPU) 601 controls the rotation operation of the speaker in accordance
with a control program stored in advance in the ROM 602.
FIG. 7 is a flowchart showing the processing procedure of the control program stored in the ROM
602 and executed by the CPU 601.
First, the CPU 601 waits until receiving a command from the light receiving unit 404 (step S1),
and when receiving the command, confirms whether the received command is a rotation
command (step S2).
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[0048]
If it is confirmed that the command is not a rotation command, other processing corresponding
to the command is executed (step S3), and the processing is terminated. On the other hand, when
it is confirmed that the received command is a rotation command for rotating the speaker main
body 402, the motor 603 is driven to rotate the speaker main body 402 supported by the
pedestal 401 (step S4). Then, the process ends.
[0049]
Thus, the speaker main body 402 of the left speaker 102 and the right speaker 103 supported
by the pedestal 401 is rotated 180 degrees, and the front surface of the speaker main body 402
(the surface on which the protective net 403 is provided) Turn to the side.
[0050]
FIG. 8 is a view showing how the left speaker 102 and the right speaker 103 rotate and face the
listener 104.
Here, since the left speaker 102 and the right speaker 103 are ultrasonic speakers that output
ultrasonic waves with high directivity, the ultrasonic waves superimposed on the voice from the
communication partner 105 projected on the image display reflection plate 101 are It can only
reach the listener 104, and no one else can hear the content.
[0051]
As described above, when the sound output direction of the left speaker 102 and the right
speaker 103 is directed to the image display reflection plate 101 (see FIG. 2), as shown in the
first embodiment, the left speaker 102 is shown. The ultrasonic wave on which the voice of the
communication partner 105 output from the right speaker 103 is superimposed is directed to
the listener 104 side when it is reflected by the image display reflection plate 101, so the listener
104 listens to the voice of the communication partner 105 as if it were an image. It sounds as if
it were output directly from the display reflector 101. On the other hand, if the audio output
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direction of the left speaker 102 and the right speaker 103 is directed to the listener 104 (see
FIG. 8), the audio from the other party 105 displayed on the image display reflector 101 is
superimposed as described above. The generated ultrasonic waves only reach the listener 104,
and others can not hear the contents.
[0052]
In this embodiment, light is transmitted and received between the commander and the pedestal.
However, not limited to light, transmission and reception may be performed by radio waves or a
wired cable.
[0053]
In the above embodiment, a plasma display is used as an image display reflector for a video
conference, but an electronic blackboard, a frame or the like may be used as an image display
reflector if it is not for a video conference.
[0054]
In the present embodiment, the ultrasonic speaker which outputs an ultrasonic wave having high
directivity has been described as the speaker. However, the present invention is not limited to
this. For example, similar action and effects can be obtained.
[0055]
Furthermore, when an opaque material such as a metal plate is used as the reflector, the opaque
material may be provided only on a part of the image display reflector that reflects the ultrasonic
wave output from the speaker.
[0056]
In the above embodiment, as in the case of the plasma display, the case where the screen also
functions as the reflector is used as the image display reflector. The reflector may be used as an
image display reflector by providing it on the screen.
[0057]
Third Embodiment The third embodiment shows the case where a projector (image projection
apparatus) is used.
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FIG. 10 is a view showing the appearance of the projector main body.
The figure (A) is a front view of a projector main body, and the figure (B) is a top view of a
projector main body.
In the figure, reference numeral 1101 denotes an image output unit for projecting an image, and
reference numeral 1002 denotes an ultrasonic speaker for outputting ultrasonic waves with high
directivity.
This ultrasonic speaker outputs ultrasonic waves with high directivity as in the first embodiment.
1003 is a projector main body.
[0058]
FIG. 11 is a diagram showing a state of viewing while the projector is disposed behind the viewer.
In the figure, reference numeral 1201 denotes a screen for projecting an image projected from a
projector. The screen 1201 is made of a substance that absorbs less sound waves, and examples
thereof include a whiteboard made of plastic or the like. FIG. 12 is a view showing a state of
viewing while the projector is disposed in front of the viewer.
[0059]
Next, in the case of viewing video and audio using a projector, an operation that sounds as if
audio is directly output from a screen on which video is displayed will be described. First, the
image output unit 1001 of the projector main body 1003 displays a video desired by the viewer
on the screen 1201. At the same time, a sound wave on which sound synchronized with the
image projected is output from the ultrasonic speaker 1002. At this time, the sound source
output direction of the ultrasonic speaker 1002 is directed to the screen 1201 which is made of
a substance with little absorption of sound waves.
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[0060]
As shown in FIG. 11, when the projector is installed behind the viewer, when highly directional
ultrasound waves output in the directions of arrows a and b in the figure are reflected by the
screen 1201, no directivity occurs. It is converted into sexual ultrasonic waves and travels in the
direction of the viewer 1202 as a spread voice (c in the figure). Thus, the viewer can hear the
audio synchronized with the image as if it were output from the screen 1201. Also, such an
arrangement of projectors is suitable for projecting onto a large screen intended for many
viewers.
[0061]
On the other hand, the arrangement of the projector installed in front of the viewer (see FIG. 12)
is suitable for projection onto a small screen. Thus, it is possible to view audio as if it were output
from the screen without being limited to the arrangement of the projector.
[0062]
According to the audio output apparatus of the first aspect of the present invention, in the audio
output apparatus for transmitting the audio related to the image displayed on the screen to the
side facing the screen, An image display unit having a screen for displaying the image, a
reflecting member provided on the screen of the image display unit for reflecting a sound wave,
and a speaker for generating a sound wave corresponding to the sound Since the speaker is
disposed at a position where the sound wave to be reflected is reflected by the reflection member
and sent to the side facing the screen of the image display unit, the speaker displayed on the
screen by a small number of speakers If, for example, the present invention is applied to a video
conference system, the speaker whose speech is displayed on the screen by the voice of the other
party is heard by the speaker. It is possible to produce a realistic effect, such as Luke. The same
effect can be obtained with the audio output device according to claim 6 and the audio output
method according to claim 7.
[0063]
According to the sound output apparatus of the second aspect, the reflection member converts
the sound wave having directivity generated from the speaker into the sound wave having no
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directivity. If the system user applies the sound wave to the screen where the image of the other
party of communication is displayed from the speaker, the user of the system generates the
sound from the speaker only at the appropriate position facing the screen. Sound waves can be
viewed without discomfort.
[0064]
According to the voice output apparatus of the third aspect, the direction of generation of the
sound wave generated from the speaker is selected from the direction from the screen of the
image display unit to the side facing the screen and the opposite direction. For example, when
the present invention is applied to a TV conference system, an image is displayed on the screen
by switching the direction of the speaker from the screen side to the viewer side as necessary.
People who need to hear the speaker's voice can hear it, making the sound generated from the
speaker difficult to hear by anyone who does not need it and not disturbing other people who are
not involved You can do so.
[0065]
According to the sound output apparatus of the fourth aspect, since the switching means is
means for rotating the speaker, the direction of the speaker can be directed to any direction by a
motor or the like.
[0066]
According to the sound output apparatus of the fifth aspect, since the speakers are provided in
pairs on the left and right sides of the screen of the image display unit, when sound waves
corresponding to stereo sound are generated from the speakers However, it will be possible to
view without discomfort.
[0067]
According to the sound output apparatus of the twelfth aspect, the speaker attached to the
projector for projecting the image generates a sound wave toward the screen for projecting the
projected image, which is easy for the viewer. Experience surround sound effects.
Also in the voice output method according to claim 13, the same effect can be obtained.
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[0068]
Brief description of the drawings
[0069]
1 is a diagram showing the configuration of a video conference system according to the first
embodiment.
[0070]
2 is a diagram showing the sound source output direction of the left and right speakers in the TV
conference system.
[0071]
3 is a diagram showing a state before rotation of the left and right speakers.
[0072]
4 is a diagram showing a state after rotation of the left and right speakers.
[0073]
5 is a block diagram showing a configuration of a control unit for controlling the rotational
operation of the left speaker 102 and the right speaker 103 respectively.
[0074]
6 is a diagram showing the appearance of a commander for transmitting a rotation command to
rotate the left speaker 102 and the right speaker 103 by the operation of the listener 104.
[0075]
7 is a flowchart showing a processing procedure of a control program stored in the ROM 602
and executed by the CPU 601.
[0076]
FIG. 8 is a diagram showing how the left speaker 102 and the right speaker 103 rotate and face
the listener 104.
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[0077]
9 is a plan view of the conventional video conference system.
[0078]
10 is a diagram showing the appearance of the projector body.
[0079]
11 is a diagram showing a state of viewing while the projector is disposed behind the viewer.
[0080]
12 is a diagram showing a state of viewing while the projector is disposed in front of the viewer.
[0081]
Explanation of sign
[0082]
DESCRIPTION OF SYMBOLS 101 Image reflective display board 102 Left speaker 103 Right
speaker 104, 1202 Listener (viewer) 106 Set top box 401 Base 601 CPU602 ROM603 Motor
1001 Image output part 1002 Ultrasonic speaker 1003 Projector main body 1201 Screen
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