close

Вход

Забыли?

вход по аккаунту

?

JP2004120459

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2004120459
The present invention has no movable part for rotating the entire image display apparatus, does
not require manual operation, and does not require a peripheral space necessary for the rotation
of the image display apparatus, so that any position can be immediately obtained. To provide an
audio output device capable of outputting a good sound to a viewer who is present. A left speaker
box 2 is provided on the left side of a viewer 1 and a right speaker box 3 is provided on the right
side. In the left speaker box 2, a left switch 4 for switching and selecting the left speaker 4
directed to the front, the left inner speaker 5 directed to the right from the front, the left speaker
4 and the left inner speaker 5. Is provided. Similarly, in the right speaker box 3, a right speaker 6
facing in the front direction, a right inner speaker 7 facing the left side from the front direction,
and a right for switching and selecting the right speaker 6 and the right inner speaker 7 A switch
39 is provided. [Selected figure] Figure 1
Voice output device
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
audio output device or an image display device including the same, and more particularly to
control of audio output for obtaining good sound from the audio output device. It is a thing. 2.
Description of the Related Art In an image display apparatus provided with an audio output
device according to the prior art, the monitor is provided with a left speaker box on the left side
and a right speaker box on the right side. The right speaker is built in the speaker and the right
speaker box. Moreover, in the conventional monitor, there was a case where it was provided on
the rotation stand so that it could rotate to right and left. Now, considering that the viewer is in
front of the monitor, the distance from the left speaker to the viewer and the distance from the
right speaker to the viewer are substantially the same. Also, since the angle of the viewer with
respect to the left and right speakers is substantially the same, the directivity of the speakers is
10-05-2019
1
also substantially the same. Therefore, it is possible to hear a good sound with balanced left and
right of stereo sound from the left speaker and the right speaker. Next, considering the case
where the viewer who is in front of the monitor moves and is positioned to the left with respect
to the monitor, the distance from the left speaker to the viewer is greater than the distance from
the right speaker to the viewer Although the distance is longer and the viewer is positioned
substantially in front of the left speaker, the directivity of the speaker is different because the
viewer is positioned on the left side with respect to the right speaker. Therefore, although the
sound of the left speaker can be heard well, the sound of the right speaker can not be heard so
that the left and right unbalanced sound of stereo sound is heard. Heretofore, in order to solve
the above problems, the monitor is rotated left by the rotating table so that the distance from the
left speaker to the viewer and the distance from the right speaker to the viewer are substantially
the same. The As a result, even with the viewer at the left position, the left speaker and the right
speaker can hear a good sound with balanced left and right stereo audio. In the related art, when
rotating an image display device provided with an audio output device, there has been an image
display device which is manually rotated or rotated left and right by a remote control. In
particular, a method of rotating the image display apparatus by detecting the position with a
remote control of the viewer is shown in detail in Patent Document 1. Further, a method of
automatically adjusting the stereo volume balance by detecting the position of the viewer with
infrared rays is described in detail in Patent Document 2.
[Patent Document 1] JP-A-9-51585 (pages 9-14, 1-7) [Patent Document 2] JP-A-5-137200
(pages 2, 1-3) However, in the image display apparatus provided with the above-described
conventional audio output apparatus, the viewer can not change the direction of rotation unless
the viewer adjusts the direction of the rotation manually or by remote control. There was a
problem that it was not possible to hear a good sound. In addition, since the movable means for
rotating the image display device is necessary, there is a problem in the miniaturization of the
image display device. In addition, it is necessary to secure a physical space around the image
display device so that the image display device can be rotated, and there is a problem in saving
the installation location of the image display device. Furthermore, there is a problem that it is not
possible to respond immediately because the entire large image display apparatus is physically
moved. In addition, there is a problem that it is not possible to provide a good sound to the
viewer only by adjusting the stereo volume balance. Therefore, the present invention has been
made to solve the problems as described above, and there is no movable part that rotates the
entire image display device, there is no manual operation, and the image display device It is an
object of the present invention to provide an audio output device capable of outputting good
sound immediately to a viewer at any position without the need for the peripheral space required
for the rotation of the image. According to the present invention, there are provided a plurality of
speakers arranged to output audio signals in different directions for each audio channel, and a
position for detecting the position of the viewer. And a switching unit configured to switch
speakers arranged in different directions for each audio channel based on the position
10-05-2019
2
information of the viewer detected by the position detection unit. DETAILED DESCRIPTION OF
THE PREFERRED EMBODIMENTS The present invention will be specifically described below
based on the drawings showing the embodiments thereof. First Embodiment FIG. 1 shows a
configuration diagram of an audio output device according to a first embodiment. Although the
audio output device of the present embodiment is configured to be provided in the image display
device, the description of the portion of the image display device is omitted in FIG. First, the left
speaker box 2 and the right speaker box 3 are provided on the left side and the right side as
viewed from the viewer 1. In the left speaker box 2, a left switch 4 for switching and selecting the
left speaker 4 directed to the front, the left inner speaker 5 directed to the right from the front,
the left speaker 4 and the left inner speaker 5. Is provided.
Similarly, in the right speaker box 3, a right speaker 6 facing in the front direction, a right inner
speaker 7 facing the left side from the front direction, and a right for switching and selecting the
right speaker 6 and the right inner speaker 7 A switch 39 is provided. The left inner speaker 5
and the right inner speaker 7 are speakers for changing the output direction of the sound inward.
Connected to the left speaker box 2 and the right speaker box 3 are a left voice input terminal 10
and a right voice input terminal 11 which are voice input terminals, and a left amplifier 14 and a
right amplifier 15 for amplifying voice. Next, the voice direction / output control circuit 22 is a
circuit that controls the output direction of the voice and the output level, and the position
detection circuit 26 is a circuit that detects the position of the viewer. The left infrared
temperature sensor 28, the middle infrared temperature sensor 29, and the right infrared
temperature sensor 30 are directional infrared temperature sensors that sense human body
temperature. By angularly arranging three directional sensors, left, middle and right viewer
positions can be detected. Next, the left audio signal 12 and the right audio signal 13 are signals
input from the left audio input terminal 10 and the right audio input terminal 11 to the left
amplifier 14 and the right amplifier 15. The left speaker drive signal 16 and the right speaker
drive signal 17 are signals input from the left amplifier 14 and the right amplifier 15 to the left
speaker box 2 and the right speaker box 3. The left audio output control signal 18 and the right
audio output control signal 19 are signals input from the audio direction / output control circuit
22 to the left amplifier 14 and the right amplifier 15. The left direction control signal 20 and the
right direction control signal 21 are signals input from the audio direction / output control
circuit 22 to the left switch 38 and the right switch 39. The position signal 23 is a signal input
from the position detection circuit 26 to the voice direction / output control circuit 22. The left
detection signal 24, the right detection signal 25, and the middle detection signal 27 are signals
input to the position detection circuit 26 from the left infrared temperature sensor 28, the
middle infrared temperature sensor 29, and the right infrared temperature sensor 30,
respectively. First, consider the case where the viewer 1 views at the front position. The body
temperature of the viewer 1 at the front position is detected by the left infrared temperature
sensor 28, the middle infrared temperature sensor 29, and the right infrared temperature sensor
30. Here, in FIG. 1, the temperature emitted by the viewer 1 is illustrated as the front viewer
10-05-2019
3
infrared ray 32.
The left detection signal 24, the right detection signal 25, and the middle detection signal 27
detected by each infrared temperature sensor are the middle detection signal 27 of the midinfrared temperature sensor 29 having a direction with the viewer 1 and the other detection
signals. It becomes a big signal in comparison. Therefore, the position detection circuit 26 detects
that the viewer is at the front position from the middle detection signal 27 with the largest
output, and transmits the front position information to the voice direction / output control circuit
22 as the position signal 23 Do. The voice direction / output control circuit 22 that has received
the front position information controls the direction of the speaker so that the viewer present at
the front position can hear a good sound. The voice direction / output control circuit 22
transmits the left direction control signal 20 to the left switch 38 so as to use the left speaker 4.
Similarly, the audio direction / output control circuit 22 transmits the right direction control
signal 21 to the right switch 39 so as to use the right speaker 6. The left audio signal 12 and the
right audio signal 13 input from the left audio input terminal 10 and the right audio input
terminal 11 are input to the left amplifier 14 and the right amplifier 15, respectively. The left
audio signal 12 and the right audio signal 13 are respectively amplified by the left amplifier 14
and the right amplifier 15 in accordance with the left audio output control signal 18 and the
right audio output control signal 19 from the audio direction / output control circuit 22. When
the position signal 23 is front position information, the left amplifier 14 and the right amplifier
15 amplify the same at the same amplification factor. The left speaker drive signal 16 and the
right speaker drive signal 17 amplified by the left amplifier 14 and the right amplifier 15 are
input to the left speaker box 2 and the right speaker box 3. In the left speaker box 2, the left
speaker drive signal 16 passes through the left switch 38 and becomes the left speaker drive
signal 41, and drives the left speaker 4. Similarly, in the right speaker box 3, the right speaker
drive signal 17 passes through the right switch 39 and becomes the right speaker drive signal 44
to drive the right speaker 6. Thereby, the viewer 1 can hear a good sound from the audio output
device according to the present embodiment because the left speaker 4 and the right speaker 6
have almost the same distance and directivity. Next, consider the case where the viewer views at
the left position. The body temperature of the viewer 8 at the left position is detected by the left
infrared temperature sensor 28, the middle infrared temperature sensor 29, and the right
infrared temperature sensor 30. Here, in FIG. 1, the temperature emitted by the viewer 8 is
illustrated as the left viewer infrared ray 31.
The left detection signal 24 detected by each infrared temperature sensor, the right detection
signal 25 and the middle detection signal 27 are the other detection signals of the left detection
signal 24 of the left infrared temperature sensor 28 which matches the direction of the viewer 8
It becomes a big signal compared with. Therefore, the position detection circuit 26 detects the
presence of the viewer at the left position from the left detection signal 24 with the largest
10-05-2019
4
output, and transmits the left position information to the voice direction / output control circuit
22 as the position signal 23. Do. The audio direction / output control circuit 22 that has received
the left position information controls the direction of the speaker so that the viewer present at
the left position can hear a good sound. The voice direction / output control circuit 22 transmits
the left direction control signal 20 to the left switch 38 so as to use the left speaker 4. On the
other hand, the audio direction / output control circuit 22 transmits the right direction control
signal 21 to the right switch 39 so as to use the inner right speaker 7. The left audio signal 12
and the right audio signal 13 input from the left audio input terminal 10 and the right audio
input terminal 11 are input to the left amplifier 14 and the right amplifier 15, respectively. The
left audio signal 12 and the right audio signal 13 are respectively amplified by the left amplifier
14 and the right amplifier 15 in accordance with the left audio output control signal 18 and the
right audio output control signal 19 from the audio direction / output control circuit 22. When
the viewer 8 is at the left position, the distance between the viewer 8 and the in-right speaker 7
is longer than the distance between the viewer 8 and the left speaker 4, so the left amplifier 14
and the right amplifier are If 15 is amplified at the same amplification factor, the audio heard
from the inner-right speaker 7 is small to the viewer 8. Therefore, the audio direction / output
control circuit 22 sends the right audio output control signal 19 to the right amplifier 15 so that
the audio heard from the left speaker 4 and the audio heard from the right inner speaker 7 have
substantially the same magnitude. Control to increase the amplification factor. The left speaker
drive signal 16 and the right speaker drive signal 17 amplified by the left amplifier 14 and the
right amplifier 15 are input to the left speaker box 2 and the right speaker box 3. In the left
speaker box 2, the left speaker drive signal 16 passes through the left switch 38 and becomes
the left speaker drive signal 41, and drives the left speaker 4. On the other hand, also in the right
speaker box 3, the right speaker drive signal 17 passes through the right switch 39 and becomes
the right speaker drive signal 43, and drives the inner-right speaker 7. As described above, by
increasing the amplification factor of the right amplifier 15, the magnitude of the sound heard
from the left speaker 4 and the magnitude of the sound heard from the right inner speaker 7 can
be made substantially the same.
Further, by driving the right inner speaker 7 instead of the right speaker 6, the directivity of the
left speaker 4 and the right inner speaker 7 with respect to the viewer 8 can be made
substantially the same. As a result, the voice output device according to the present embodiment
can hear a good sound. When the viewer is at the right, the right detection signal 25 of the right
infrared temperature sensor 30 becomes larger than the detection signals of the other sensors,
and the right position is detected. In the following processing, processing that is opposite to the
left position is performed. Therefore, the audio output device according to the present
embodiment does not have movable parts for rotating the entire image display device, does not
operate manually, and does not require a peripheral space necessary for the rotation of the
image display device. , Can immediately output a good sound to the viewer at any position.
Although the audio output device according to the present embodiment has been described in
10-05-2019
5
the case of two channels provided with speakers on the left and right, in the present invention,
even in the case of multiple channels other than two channels or one channel. Operates
effectively and can output good sound to the viewer. Further, in the audio output device
according to the present embodiment, the case is described in which two speakers having
different directions for each channel and three infrared temperature sensors for position
detection are provided, but in the present invention, the directions are different. By increasing
the number of speakers and the number of sensors, it is possible to improve the accuracy of
position detection and output better sound. Further, the position detection means of the present
invention is not limited to the above-described means, and may be a position detection means
described in the other embodiments. Second Embodiment FIGS. 2 and 3 show configuration
diagrams of a speaker box of an audio output device according to a second embodiment.
Although only the right speaker box 3 is illustrated in FIGS. 2 and 3, the left speaker box 2 has a
similar configuration. The right speaker 6 is provided in the right speaker box 3 together with
the right rotation device 59R. Therefore, the direction of the right speaker 6 can be freely
changed. The direction of the right speaker 6 is controlled by a right rotation device drive signal
58R which is a control signal from the speaker direction control circuit 57. The control of the
speaker direction control circuit 57 is controlled by the position signal 23 from the position
detection circuit 26. The voice output device according to the present embodiment has a
configuration in which the left speaker box 2 and the right speaker box 3 in FIG. 1 are replaced
with the speaker boxes shown in FIGS. 2 and 3.
The operation of the audio output device according to the present embodiment described below
will be described. First, consider the case where the viewer 1 views at the front position. The
body temperature of the viewer 1 at the front position is detected by the left infrared
temperature sensor 28, the middle infrared temperature sensor 29, and the right infrared
temperature sensor 30. The position detection circuit 26 detects that the viewer is at the front
position from the middle detection signal 27 with the largest output, and transmits the position
signal 23 including the front position information to the speaker drive direction control circuit
57. . FIG. 2 shows the right speaker box 3 when the viewer views at the front position. The
speaker drive direction control circuit 57 transmits the right rotation device drive signal 58R to
the right rotation device 59R so as to direct the direction of the right speaker 6 to the front
according to the received position signal 23. The right rotation device 59R receives the right
rotation device drive signal 58R and directs the right speaker 6 to the front. With the right
speaker 6 directed to the front, the right speaker 6 is driven by the right speaker drive signal 17.
Although not shown, the left rotation device 59L of the left speaker 4 similarly receives the left
rotation device drive signal 58L, faces the front, and is driven by the left speaker drive signal 16.
Thereby, the viewer 1 can hear a good sound from the audio output device according to the
present embodiment because the left speaker 4 and the right speaker 6 have almost the same
distance and directivity. Next, consider the case where the viewer views at the left position. The
body temperature of the viewer 8 at the left position is detected by the left infrared temperature
10-05-2019
6
sensor 28, the middle infrared temperature sensor 29, and the right infrared temperature sensor
30. The position detection circuit 26 detects the presence of the viewer 8 at the left position
from the left detection signal 28 with the largest output, and transmits the position signal 23
including the left position information to the speaker drive direction control circuit 57. Do. FIG. 3
shows the right speaker box 3 when the viewer views at the left position. The speaker drive
direction control circuit 57 transmits the right rotation device drive signal 58R to the right
rotation device 59R in order to turn the direction of the right speaker 6 to the left in accordance
with the received position signal 23. The right rotation device 59R receives the right rotation
device drive signal 58R and directs the right speaker 6 to the left. With the right speaker 6
directed to the left, the right speaker 6 is driven by the right speaker drive signal 17. Although
not shown, the left speaker 4 receives the left rotation device drive signal 58L from the left
rotation device 59L, faces the front, and is driven by the left speaker drive signal 16.
As a result, the direction of the left speaker 4 and the direction of the right speaker 6 are
directed to the direction of the viewer 8, and the directivity of the speakers is substantially the
same. Also in the present embodiment, as in the first embodiment, the distance between the
viewer 8 and the inner right speaker 7 is longer than the distance between the viewer 8 and the
left speaker 4. Therefore, it is necessary to make the size of the sound heard by the viewer 8
from the left speaker 4 substantially the same as the size of the sound heard from the right inner
speaker 7. Although not shown, the output control circuit that has received the position signal 23
transmits the right audio output control signal 19 to the right amplifier 15 to control to increase
the amplification factor of the right amplifier 15. By the above, the viewer 8 can hear a good
sound with the voice output device according to the present embodiment. In the voice output
device according to the present embodiment, the direction of the speaker can be finely changed
if accurate position information can be obtained, and therefore the viewer at any position is
compared with the first embodiment. It is possible to obtain a good sound. Further, the audio
output device according to the present embodiment can effectively operate and obtain a good
sound even when the speakers have multiple channels or one channel. Further, the position
detection means of the present invention is not limited to the above-described means, and may
be a position detection means described in the other embodiments. Third Embodiment FIG. 4
shows a configuration diagram of an audio output device according to a third embodiment.
Although the audio output device of the present embodiment is configured to be provided in the
image display device, the description of the portion of the image display device is omitted in FIG.
In FIG. 4, the left delay circuit 45 and the right delay circuit 46 are provided between the left
voice input terminal 10 and the right voice input terminal 11 and the left amplifier 14 and the
right amplifier 15. The left delay circuit 45 and the right delay circuit 46 are controlled by the
left delay control signal 47 and the right delay control signal 48 from the audio delay / output
control circuit 49. The means for detecting the position of the viewer comprises a camera 83 and
a position detection circuit 85, and the camera output signal 84 imaged by the camera 83 is
image processed by the position detection circuit 85 and is subjected to audio delay / output
10-05-2019
7
control as a position signal 23. It is sent to the circuit 49. In addition, it is a code | symbol shown
in FIG. 4, Comprising: When it is the same as the code | symbol shown in FIG. 1, the same
structure as the figure is shown. FIGS. 5 and 6 show images of the camera according to the
present embodiment. The image 86 is an image obtained by photographing a viewer with the
camera 83. In addition, since this image | video 86 is an image | video from the camera 83 side,
it has a relation where right and left reverse with the case where it sees from the viewer side.
When the viewer 1 is in the front, the image is captured as in the front skin-colored area 87 of
FIG. 5, but when the viewer 8 is on the left, the image is captured as the right skin-colored area
88 of FIG. The position detection circuit 85 detects the viewer position based on which of the left
area A, the middle area B, and the right area C of the image 86 has the skin color area gravity
center. In the case of the left area A, the right position, the front position in the middle area B, the
left position in the right area C, and the viewer position are detected. FIG. 7 shows an audio
output according to the present embodiment. The waveform 60 and the amplitude 64 (FIG. 7 (a))
of the left speaker become the waveform 62 and the amplitude 66 (FIG. 7 (c)) of the left speaker
after correction by the audio delay / output control circuit 49. On the other hand, the waveform
61 and the amplitude 65 (FIG. 7 (b)) of the right speaker become the waveform 63 and the
amplitude 67 (FIG. 7 (d)) of the right speaker after correction by the audio delay / output control
circuit 49. The delay amount of the right speaker waveform 61 with respect to the left speaker
waveform 60 is a delay 68. Next, the operation of the audio output device according to the
present embodiment will be described. First, consider the case where the viewer 1 views at the
front position. In FIG. 4, the front viewer video 82 of the viewer 1 is captured by the camera 83,
and the camera output signal 84 is transmitted to the position detection circuit 85. FIG. 5 shows
an image 86 when the viewer 1 is in the front, and since the center of the front skin color area
87 is in the area B, the position detection circuit 85 detects the viewer 1 as the front position.
Then, the position detection circuit 85 transmits the position signal 23 including the information
on the front position to the audio delay / output control circuit 49. The audio delay / output
control circuit 49 transmits the left delay control signal 47 and the right delay control signal 48
to the left delay circuit 45 and the right delay circuit 46 based on the information on the front
position. When the viewer is in the front, the distances from the viewer 1 to the left speaker 4
and the right speaker 6 are almost the same, and therefore, there is no delay between the
waveform of the left speaker 4 and the waveform of the right speaker 6 The delay amount is not
set for both the left delay circuit 45 and the right delay circuit 46. The audio signal is input from
the left audio input terminal 10 and the right audio input terminal 11, the left audio signal 12
and the right audio signal 13 are input to the left delay circuit 45 and the right delay circuit 46,
respectively, and the delay amount is added. It is output as the left delay output 70 and the right
delay output 71. The left delay output 70 and the right delay output 71 are input to the left
amplifier 14 and the right amplifier 15.
10-05-2019
8
The left amplifier 14 and the right amplifier 15 are respectively amplified according to the left
audio output control signal 18 and the right audio output control signal 19, but when the
position signal 23 is information on the front position, they are amplified with the same
amplification factor . The left speaker drive signal 16 and the right speaker drive signal 17
output from the amplifier 14 and the right amplifier 15 are input to the speaker 4 and the
speaker 6. Thereby, the viewer 1 can hear a good sound from the left speaker 4 and the right
speaker 6 from the audio output device according to the present embodiment. Next, consider the
case where the viewer views at the left position. In FIG. 4, the left viewer video 81 of the viewer 8
is photographed by the camera 83, and the camera output signal 84 is transmitted to the
position detection circuit 85. FIG. 6 shows an image 86 when the viewer 6 is on the left side.
Since the center C of the front skin color area 88 is in the area C, the position detection circuit 85
detects the viewer 1 as the left position. Then, the position detection circuit 85 transmits the
position signal 23 including the information on the left position to the audio delay / output
control circuit 49. The audio delay / output control circuit 49 transmits the left delay control
signal 47 and the right delay control signal 48 to the left delay circuit 45 and the right delay
circuit 46 based on the information of the left position, and sets the delay amount. When the
viewer 8 is on the left side, the distance from the viewer 8 to the right speaker 6 is longer than
the distance from the viewer 8 to the left speaker 4. Therefore, compared with the sound output
from the left speaker 4, the sound output from the right speaker 6 is delayed and reaches the
viewer 8. Therefore, the delay of the waveform output from the right speaker 6 is added to the
waveform output from the left speaker 4 so that the viewer 8 can hear the sound from the left
speaker 4 and the sound from the right speaker 6 simultaneously. Do. Description will be made
with reference to the audio output waveform diagram shown in FIG. Here, the position of the
viewer in FIG. 7 is the viewer 8 at the left position with respect to the monitor. At this time, the
output from the left speaker 4 is shown as a waveform 60 of the left speaker, and the output
from the right speaker 6 is shown as a waveform 61 of the right speaker. As can be seen in FIG.
4, the distance 61 from the viewer 8 to the right speaker 6 is longer than that of the left speaker
4, and the waveform 61 of the right speaker has a delay 68 with respect to the waveform 60 of
the left speaker. Therefore, in the left delay circuit 45, correction is performed by adding a delay
amount corresponding to the delay 68 to the waveform 60 of the left speaker. As a result, the
waveform 60 of the left speaker is corrected as the waveform 61 of the left speaker.
On the other hand, the right delay circuit 46 corrects the waveform 61 of the right speaker to the
waveform 63 of the right speaker without adding a delay amount. Next, the left delay output 70
and the right delay output 71 are input to the left amplifier 14 and the right amplifier 15. The
left amplifier 14 and the right amplifier 15 are respectively amplified according to the left audio
output control signal 18 and the right audio output control signal 19. When the position signal
23 includes left position information, the distance from the viewer 8 to the right speaker 6 is
longer than the distance from the viewer 8 to the left speaker 4. Therefore, the amplitude of the
sound output from the right speaker 6 reaching the viewer 8 is smaller than the amplitude of the
10-05-2019
9
sound output from the left speaker 4. Therefore, the amplification factor of the right amplifier 15
is increased relative to the left amplifier 14 so that the amplitude of the right speaker 6 reaching
the viewer 8 is the same as the amplitude of the left speaker 4. Referring to the audio output
waveform diagram shown in FIG. 7, the amplitude 65 of the right speaker (FIG. 7A) is the
amplitude 64 of the left speaker (FIG. 7B) from the relationship of the distance of the viewer 8
Smaller than). Therefore, amplification is performed in the left amplifier 14 and the right
amplifier 15 so that the amplitude 64 of the left speaker and the amplitude 65 of the right
speaker become the same. That is, as shown in FIGS. 7 (c) and 7 (d), the amplitude 66 of the left
speaker and the amplitude 67 of the right speaker are corrected to be the same. The left delay
drive 70 and the right delay drive 71 corrected by the left delay output 70 and the right delay
output 71, and the amplifier 14 and the right amplifier 15 are input to the speaker 4 and the
speaker 6. Thereby, even when the viewer 8 is on the left side, good sound can be heard from the
audio output device according to the present embodiment from the left speaker 4 and the right
speaker 6. In the present embodiment, in the case where the viewer is at the right, the operation
is opposite to the left and right. Further, in the audio output device according to the present
embodiment, a simple audio output device can be configured since the movable portion of the
speaker and the plurality of speakers are unnecessary. In the present embodiment, the amount of
delay to be corrected and the amplification factor are set so that the viewer makes fine
adjustments and stores them in advance at the position to view and listen, and the stored value is
read out by the output of position detection. By configuring, it is possible to obtain better sound.
Further, in the present embodiment, the delay amount to be corrected and the amplification
factor can be corrected by detecting not only the direction but also the distance by the position
detection circuit and correcting according to the information thereof. It is possible to get a good
sound.
The image processing unit of the position detection circuit according to the present embodiment
can also detect the feature extraction of the human image. Further, the position detection means
of the present invention is not limited to the above-described means, and may be a position
detection means described in the other embodiments. Furthermore, it is also possible to use the
voice output correction performed in this embodiment in combination with other embodiments.
Fourth Embodiment FIG. 8 shows a configuration diagram of an audio output device according to
a fourth embodiment. Although the audio output device of the present embodiment is configured
to be included in the image display device, the description of the portion of the image display
device is omitted in FIG. The left rotation device 59L controls the direction of the left speaker 4
by the left rotation device drive signal 58L. The configurations of the left speaker box 2 and the
right speaker box 3 according to the present embodiment are the same as the configurations
described in the second embodiment. The configuration other than the left speaker box 2 and the
right speaker box 3 according to the present embodiment is the same as the configuration
described in the third embodiment. Therefore, in the case of the reference numerals shown in
FIG. 8 and the same reference numerals as FIG. 3 and FIG. 4, the same configurations as FIG. 3
10-05-2019
10
and FIG. 4 are shown. First, consider the case where the viewer 1 views at the front position. The
front position is detected by image processing of the camera output signal 84 of the camera 83
as described in the third embodiment, and the position detection circuit 85 sends the position
signal 23 including information on the front position to the speaker direction control circuit 57.
Be The right rotation device drive signal 58R is sent from the speaker direction control circuit 57
to the right rotation device 59R, and the right speaker 6 faces the front (not shown). Similarly,
the left rotation device drive signal 58L is sent to the left rotation device 59L, and the left
speaker 4 faces the front. At the same time as the position signal 23 including the information of
the front position is sent to the speaker direction control circuit 57, the position signal 23
including the information of the front position is also sent to the voice / delay control circuit 49.
Then, as in the operation of the third embodiment, the delay amount and the amplitude
generated due to the difference in the distance between the speaker and the viewer are
corrected. Thereby, the viewer 1 can hear a good sound from the audio output device according
to the present embodiment because the left speaker 4 and the right speaker 6 have almost the
same distance and directivity. Next, consider the case where the viewer 8 views at the left
position. The left position is detected by image processing of the camera output signal 84 of the
camera 83 as described in the third embodiment, and the position detection circuit 85 sends the
position signal 23 including information on the left position to the speaker direction control
circuit 57. Be
The right rotation device drive signal 58R is sent from the speaker direction control circuit 57 to
the right rotation device 59R, and the speaker 7 faces the left. On the other hand, the left rotation
device drive signal 58L is sent to the left rotation device 59L, and the left speaker 4 faces the
front. At the same time as the position signal 23 including the information on the left position is
sent to the speaker direction control circuit 57, the position signal 23 including the information
on the left position is also sent to the voice / delay control circuit 49. Then, as in the operation of
the third embodiment, the correction of the delay amount and the amplitude caused by the
difference in the distance between the speaker and the viewer is performed. As a result, the
viewer 8 can change the direction of the right speaker 6 to the direction of the viewer 8 as
compared with the third embodiment, so that it is possible to obtain an audio output device that
can hear more favorable sound. it can. In the present embodiment, the delay amount to be
corrected, the amplification factor, and the angle of the speaker are stored in advance by the
viewer at the position to view and listen, and the value stored by the output of position detection
By configuring to read out, it is possible to obtain better sound. Further, in the present
embodiment, the delay amount to be corrected, the amplification factor, and the angle of the
speaker are configured to be corrected according to the information by detecting not only the
direction but also the distance by the position detection circuit. It is possible to get a better sound
by. The position detection means of the present invention is not limited to the above-described
means, and may be the position detection means described in the other embodiments. Fifth
Embodiment FIG. 9 shows a configuration diagram of an audio output device according to a fifth
10-05-2019
11
embodiment. Although the audio output device of the present embodiment is configured to be
included in the image display device, the description of the portion of the image display device is
omitted in FIG. 9, the left ultrasonic wave receiving circuit 72 and the left ultrasonic wave
transmitting circuit 73 in place of the left infrared temperature sensor 28, the middle infrared
temperature sensor 29, and the right infrared temperature sensor 30, which are position
detecting means shown in FIG. A sound wave receiving circuit 74, a front ultrasonic wave
transmitting circuit 75, a right ultrasonic wave receiving circuit 76 and a right ultrasonic wave
transmitting circuit 77 are used. Further, in the case of the reference numerals shown in FIG. 9
and the same reference numerals as FIG. 1, the same configuration as that of FIG. The position
detection means of the present embodiment is constituted by a pair of ultrasonic transmission
circuits 73, 75, 77 and ultrasonic reception circuits 72, 74, 76, and ultrasonic transmission
circuits 73, 75, The ultrasonic waves transmitted from 77 are reflected by the viewer and
received by the ultrasonic wave receiving circuits 72, 74 and 76 to detect the position.
In addition, each pair of ultrasonic circuits have directivity and are attached at different angles.
This makes it possible to detect the position of the viewer in different directions. In FIG. 9, left,
middle, and right viewer positions are detected by arranging a pair of three directional ultrasonic
circuits at an angle. The distance from the pair of ultrasound circuits to the viewer can also be
known by measuring the time until the ultrasound is reflected to the viewer and comes back.
Next, the operation of the audio output device according to the present embodiment will be
described. First, consider the case where the viewer 1 views at the front position. An ultrasonic
wave is transmitted from the left ultrasonic wave transmission circuit 73, and the reflection
thereof is received by the left ultrasonic wave reception circuit 73. Next, an ultrasonic wave is
transmitted from the front ultrasonic wave transmission circuit 74, and a front ultrasonic wave
signal 79 of the reflection is received by the front ultrasonic wave reception circuit 75. Then, an
ultrasonic wave is transmitted from the right ultrasonic wave transmission circuit 76 and its
reflection is received by the right ultrasonic wave reception circuit 77. The detection signals 24,
27, 25 received by the ultrasonic wave receiving circuits 73, 75, 77 are sent to the position
detection circuit 26. When the viewer 1 is at the front position, the position detection circuit 26
detects that the viewer 1 is at the front position because the middle detection signal 27 is the
largest and the return time of the reflected wave is short. . After the position detection, the
operation is the same as in the first embodiment. The position detection circuit 26 transmits a
position signal 23 including information on the front position to the audio direction / output
control circuit 22, and the audio direction / output control circuit 22 generates the left amplifier
14 and the right amplifier 15 based on the information of the position signal 23, The left switch
38 and the right switch 39 are controlled. Thereby, the viewer 1 can hear a good sound from the
audio output device according to the present embodiment because the left speaker 4 and the
right speaker 6 have almost the same distance and directivity. Consider a case where the viewer
8 views at the left position. The ultrasonic waves are transmitted from the left ultrasonic wave
transmission circuit 73, and the left ultrasonic wave signal 78 of the reflection is received by the
10-05-2019
12
left ultrasonic wave reception circuit 73. Next, an ultrasonic wave is transmitted from the front
ultrasonic wave transmission circuit 74, and a front ultrasonic wave signal 79 of the reflection is
received by the front ultrasonic wave reception circuit 75. Then, an ultrasonic wave is
transmitted from the right ultrasonic wave transmission circuit 76 and its reflection is received
by the right ultrasonic wave reception circuit 77. The detection signals 24, 27, 25 received by
the ultrasonic wave receiving circuits 73, 75, 77 are sent to the position detection circuit 26.
When the viewer 8 is at the left position, the position detection circuit 26 detects that the viewer
8 is at the left position because the left detection signal 24 is the largest and the return time of
the reflected wave is short. .
After the position detection, the operation is the same as in the first embodiment. The position
detection circuit 26 transmits a position signal 23 including information on the left position to
the audio direction / output control circuit 22, and the audio direction / output control circuit 22
generates the left amplifier 14 and the right amplifier 15 based on the information of the
position signal 23, The left switch 38 and the right switch 39 are controlled. For example, the
right switch 39 switches to the in-right speaker 7, and the right amplifier 15 amplifies the right
audio output control signal 19 and outputs it as the right speaker drive signal 17 to the in-right
speaker 7. As a result, in the audio output device according to the present embodiment, good
sound can be heard even when the viewer is at the left position. When the viewer is at the right,
the right detection signal 25 of the right ultrasonic wave receiving circuit 77 becomes larger
than the detection signals of other sensors, and the right position is detected. In the following
processing, processing that is opposite to the left position is performed. Therefore, even in the
audio output device according to the present embodiment, there is no movable portion for
rotating the entire image display device, there is no manual operation, and the peripheral space
required for the rotation of the image display device is unnecessary. , Can immediately output a
good sound to the viewer at any position. In the present embodiment, reflection data at the
viewing position is stored in advance, and correlation with stored reflection data is determined to
determine the position even if the viewer has good sound. You can get it. Further, the
configuration of the speaker box of the present invention is not limited to the above-described
configuration, and may be the configuration of the speaker box described in the other
embodiments. Sixth Embodiment FIG. 10 shows a configuration diagram of an audio output
device according to a sixth embodiment. The audio output device of the present embodiment is
configured to be provided in the image display device, but in FIG. 10, the description of the
portion of the image display device is omitted. In FIG. 10, the left audio receiving circuit 50 and
the right audio receiving circuit 51 are used instead of the left infrared temperature sensor 28,
the middle infrared temperature sensor 29, and the right infrared temperature sensor 30 which
are position detecting means shown in FIG. Further, in the case of the reference numerals shown
in FIG. 9 and the same reference numerals as FIG. 1, the same configuration as that of FIG. The
position detection means of the present embodiment is composed of the left sound receiving
circuit 50 and the right sound receiving circuit 51, and detects the position of the viewer from
10-05-2019
13
the size and timing of the sound to be received. Since the voice receiving circuit closer to the
viewer receives the loud voice at an earlier timing, the viewer position is detected by comparing
the voice received by the left voice receiving circuit 50 and the right voice receiving circuit 51.
The distance to the viewer can also be known from the timing of the audio received by the left
audio receiving circuit 50 and the right audio receiving circuit 51. Next, the operation of the
audio output device according to the present embodiment will be described. First, consider the
case where the viewer 1 views at the front position. The front left generated sound 54 and the
front right generated sound 55 emitted by the viewer 1 are received by the left voice receiving
circuit 50 and the right voice receiving circuit 51, respectively. The audio receiving circuits 50
and 51 send the left detection signal 24 and the right detection signal 25 to the position
detection circuit 26 according to the size and timing of the audio received by the audio reception
circuits 50 and 51, respectively. When the viewer 1 is at the front position, the left detection
signal 24 and the right detection signal 25 sent to the position detection circuit 26 are the same
because the size and timing of the sound received by the audio reception circuits 50 and 51 are
the same. , It is detected that the viewer 1 is in the front position. After the position detection, the
operation is the same as in the first embodiment. The position detection circuit 26 transmits a
position signal 23 including information on the front position to the audio direction / output
control circuit 22, and the audio direction / output control circuit 22 generates the left amplifier
14 and the right amplifier 15 based on the information of the position signal 23, The left switch
38 and the right switch 39 are controlled. Thereby, the viewer 1 can hear a good sound from the
audio output device according to the present embodiment because the left speaker 4 and the
right speaker 6 have almost the same distance and directivity. Consider the case where the
viewer 8 views at the left position. The left generated sound 52 and the right generated sound 53
emitted by the left viewer 8 are received by the left audio receiving circuit 50 and the right audio
receiving circuit 51, respectively. The audio receiving circuits 50 and 51 send the left detection
signal 24 and the right detection signal 25 to the position detection circuit 26 according to the
size and timing of the audio received by the audio reception circuits 50 and 51, respectively.
When the viewer 8 is at the left position, since the viewer 8 is closer to the left voice receiving
circuit 50 than the right voice receiving circuit 51, the right voice receiving circuit 51 receives
the left generated sound 52 received by the left voice receiving circuit 50. Compared to the right
generated sound 53. Also, the timing of reception is earlier in the left audio receiving circuit 50.
Therefore, the detection signal 24 becomes larger than the right detection signal 25, and it is
detected that the viewer 8 is at the left position. After position detection, the operation is the
same as in the first embodiment. The position detection circuit 26 transmits a position signal 23
including information on the left position to the audio direction / output control circuit 22, and
the audio direction / output control circuit 22 generates the left amplifier 14 and the right
amplifier 15 based on the information of the position signal 23, The left switch 38 and the right
switch 39 are controlled.
10-05-2019
14
For example, the right switch 39 switches to the in-right speaker 7, and the right amplifier 15
amplifies the right audio output control signal 19 and outputs it as the right speaker drive signal
17 to the in-right speaker 7. As a result, in the audio output device according to the present
embodiment, good sound can be heard even when the viewer is at the left position. When the
viewer is at the right, the right detection signal 25 of the right audio receiving circuit 51
becomes larger than the detection signals of other sensors, and the right position is detected. In
the following processing, processing that is opposite to the left position is performed. Therefore,
even in the audio output device according to the present embodiment, there is no movable
portion for rotating the entire image display device, there is no manual operation, and the
peripheral space required for the rotation of the image display device is unnecessary. , Can
immediately output a good sound to the viewer at any position. In the present embodiment,
instead of the sound used for position detection, detection is possible using other sounds such as
clapping hands, stepping sounds of feet, and whistling sounds, which is equally good. You can get
a sound. Further, the configuration of the speaker box of the present invention is not limited to
the above-described configuration, and may be the configuration of the speaker box described in
the other embodiments. Seventh Embodiment FIG. 11 shows a configuration diagram of position
detection means of an audio output device according to a seventh embodiment. 11, in place of
the left infrared temperature sensor 28, the middle infrared temperature sensor 29, the right
infrared temperature sensor 30, and the position detection circuit 26 which are the position
detection means shown in FIG. Use. The configuration of the other audio output device is the
same as that of FIG. 1 shown in the first embodiment, and thus the description thereof is omitted
in FIG. The position detecting means of the present embodiment is composed of the audio
receiving circuit 35 and the position detecting circuit 34, receives the audio uttered by the
viewer, and the content of the audio is transmitted to the audio by the position detecting circuit
34. Perform recognition processing to understand. For example, if the viewer utters "front", the
position detection circuit 34 performs voice recognition processing to understand that the viewer
is in front. The present embodiment is configured by a method of detecting the position detection
means of the first embodiment by speech recognition. Next, the operation of the audio output
device according to the present embodiment will be described. First, consider the case where the
viewer 1 views at the front position. In FIG. 11, the viewer 1 utters a front viewer voice 37
“front” to the voice receiving circuit 35.
The reception circuit output signal 33 "front" from the voice reception circuit 35 is input to the
position detection circuit 34, and the position detection circuit 34 performs voice recognition
processing on the reception circuit output signal 33, and the voice content "front" Understand
and detect that the viewer is in the front position. After position detection, the operation is the
same as in the first embodiment. The position detection circuit 26 transmits a position signal 23
including information on the front position to the audio direction / output control circuit 22, and
the audio direction / output control circuit 22 generates the left amplifier 14 and the right
10-05-2019
15
amplifier 15 based on the information of the position signal 23, The left switch 38 and the right
switch 39 are controlled. Thereby, the viewer 1 can hear a good sound from the audio output
device according to the present embodiment because the left speaker 4 and the right speaker 6
have almost the same distance and directivity. Consider a case where the viewer 1 views at the
left position. In FIG. 11, the viewer 8 utters a left viewer voice 36 “left” to the voice receiving
circuit 35. The reception circuit output signal 33 "left" is input from the speech reception circuit
35 to the position detection circuit 34, and the position detection circuit 34 performs speech
recognition processing on the reception circuit output signal 33, and the contents of speech "left"
Understand and detect that the viewer is in the left position. After the position detection, the
operation is the same as in the first embodiment. The position detection circuit 26 transmits a
position signal 23 including information on the left position to the audio direction / output
control circuit 22, and the audio direction / output control circuit 22 generates the left amplifier
14 and the right amplifier 15 based on the information of the position signal 23, The left switch
38 and the right switch 39 are controlled. For example, the right switch 39 switches to the inright speaker 7, and the right amplifier 15 amplifies the right audio output control signal 19 and
outputs it as the right speaker drive signal 17 to the in-right speaker 7. As a result, in the audio
output device according to the present embodiment, good sound can be heard even when the
viewer is at the left position. After the correction to the left position as described above, if the
correction is not sufficient yet, the viewer 8 utters the left viewer voice 36 “a little more left”
to the voice receiving circuit 35 again. The reception circuit output signal 33 "a little more left" is
input from the speech reception circuit 35 to the position detection circuit 34, and the position
detection circuit 34 performs speech recognition processing to understand the contents of the
speech "a little more left" The position signal 23 is transmitted to the output control circuit 22 so
as to be corrected slightly to the left.
When the viewer is at the right, if the viewer says “right”, the position detection circuit 34
detects the right position. In the following processing, processing that is opposite to the left
position is performed. Therefore, even in the audio output device according to the present
embodiment, there is no movable portion for rotating the entire image display device, there is no
manual operation, and the peripheral space required for the rotation of the image display device
is unnecessary. , Can immediately output a good sound to the viewer at any position. In the
present embodiment, the method of position detection based on the loudness and timing of the
sound emitted by the viewer according to the sixth embodiment is performed first, and then a
better sound can be obtained by the method of performing speech recognition and fine tuning. It
is possible. Further, the configuration of the speaker box of the present invention is not limited to
the above-described configuration, and may be the configuration of the speaker box described in
the other embodiments. In the first to seventh embodiments, the timing for performing position
detection is always operated, automatically operated at a constant interval, operated when the
power of the image display apparatus is switched, and the viewer specified switch The timing to
operate after operating the key can be considered. According to the present invention, the viewer
10-05-2019
16
can obtain a good sound at any timing. Also, in the first to seventh embodiments, an image
display apparatus having a monitor has been described, but even in the case of only an audio
output apparatus having no monitor, it is possible to obtain good sound as well. The audio output
apparatus according to the present invention comprises switching means for switching speakers
arranged in different directions for each audio channel based on the position information of the
viewer detected by the position detection means. Therefore, there is no moving part to rotate the
entire image display device, there is no need to operate it manually, and there is no need for the
peripheral space necessary for the rotation of the image display device. There is an effect that
can output a good sound. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of
an audio output device according to a first embodiment of the present invention. FIG. 2 is a
configuration diagram of a speaker box of an audio output device according to Embodiment 2 of
the present invention. FIG. 3 is a configuration diagram of a speaker box of an audio output
device according to Embodiment 2 of the present invention. FIG. 4 is a configuration diagram of
an audio output device according to Embodiment 3 of the present invention. FIG. 5 is a diagram
showing an image of a camera according to Embodiment 3 of the present invention. FIG. 6 is a
diagram showing an image of a camera according to Embodiment 3 of the present invention.
FIG. 7 is a waveform diagram of audio output according to a third embodiment of the present
invention. FIG. 8 is a block diagram of an audio output device in a fourth embodiment of the
present invention; FIG. 9 is a block diagram of an audio output device in a fifth embodiment of
the present invention; FIG. 10 is a block diagram of an audio output device according to a sixth
embodiment of the present invention; FIG. 11 is a configuration diagram of position detection
means of the audio output device according to Embodiment 7 of the present invention.
[Description of the code] 1, 8 viewers, 2 left speaker box, 3 right speaker box, 4 left speaker, 5
left inner speaker, 6 right speaker, 7 right inner speaker, 10 left audio input terminal, 11 right
audio input terminal , 12 left audio signal, 13 right audio signal, 14 left amplifier, 15 right
amplifier, 16 left speaker drive signal, 17 right speaker drive signal, 18 left audio output control
signal, 19 right audio output control signal, 20 left control signal , 21 right direction control
signal, 22 voice direction / output control circuit, 23 position signal, 24 left detection signal, 25
right detection signal, 26, 34, 85 position detection circuit, 27 middle detection signal, 28 left
infrared temperature sensor, 29 Mid infrared temperature sensor, 30 right infrared temperature
sensor, 31 left viewer infrared, 32 front viewer infrared, 33 Reception circuit output signal, 35
voice reception circuit, 36 left viewer voice, 37 front viewer voice, 38 left switch, 39 right switch,
41 left speaker drive signal, 43 right speaker drive signal, 44 right speaker drive signal, 45 left
Delay circuit, 46 right delay circuit, 47 left delay control signal, 48 right delay control signal, 49
audio delay / output control circuit, 50 left audio receiving circuit, 51 right audio receiving
circuit, 52 left generated sound, 53 right generated sound, 54 front left generated sound, 55
front right generated sound, 57 speaker direction control circuit, 58R right rotation device drive
signal, 58L left rotation device drive signal, 59R right rotation device, 59L left rotation device,
60, 62 waveform of left speaker, 61, 63 Right speaker waveform, 64, 66 Left speaker amplitude,
10-05-2019
17
65, 67 Right speaker amplitude, 68 Delay, 70 left delay output, 71 right delay output, 72 left
ultrasonic wave receiving circuit, 73 left ultrasonic wave transmitting circuit, 74 front ultrasonic
wave receiving circuit, 75 front ultrasonic wave transmitting circuit, 76 right ultrasonic wave
receiving circuit, 77 right ultrasonic wave Sound wave transmission circuit, 78 left ultrasonic
signal, 79 front ultrasonic signal, 81 left viewer image, 82 front viewer image, 83 camera, 84
camera output signal, 86 image, 87 front skin color area, 88 right skin color area.
10-05-2019
18
Документ
Категория
Без категории
Просмотров
0
Размер файла
36 Кб
Теги
jp2004120459
1/--страниц
Пожаловаться на содержимое документа