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JP2006303661

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DESCRIPTION JP2006303661
In a voice controller, even when a shield is present between a voice controller and a loudspeaker,
the location of the loudspeaker can be specified, and moreover, the cost of the product can be
reduced. A microprocessor of an audio controller controls to output the same sound at the same
volume level sequentially from each speaker (S1). And based on the level of the sound which
collected the sound output from each speaker by the microphone, the relative distance from each
speaker to the microphone is calculated (S2 and S3), and the sound from the speaker is
calculated based on this relative distance. Control the output level of (S4). [Selected figure] Figure
3
Voice controller
[0001]
The present invention relates to an audio controller having a function of controlling an output
level of sound from a speaker, such as a television receiver, a video player, a DVD (Digital
Versatile Disc) player, and a hard disk player.
[0002]
Conventionally, in an audio controller such as a television receiver, the position of each speaker
and the position of the viewer are specified based on the image captured by the camera, and
based on the relative position between each speaker and the viewer, What adjusted the sound to
be distributed is known (see Patent Document 1).
04-05-2019
1
Also, in the field of acoustic systems that transmit voice data to speakers wirelessly, a pulse
signal is emitted from the radar device to each speaker, and the position of the speaker is
detected based on the pulse signal returned from each speaker. Those known are known (see
Patent Document 2).
[0003]
However, in the method of specifying the position of the speaker shown in the above-mentioned
Patent Documents 1 and 2, there is a problem that the position of the speaker can not be
specified if there is a shield between the audio controller and the speaker. In addition, in the case
of using the method of specifying the position of the speaker disclosed in the above-mentioned
Patent Document 1, it is necessary to incorporate a camera in the voice controller, which leads to
an increase in the cost of the product. Furthermore, in the case of using the method of detecting
the position of the speaker disclosed in Patent Document 2, a radar device for outputting a pulse
signal is required, which leads to an increase in the cost of the product. JP, 2001-54200, A JP,
2004-343569, A
[0004]
The present invention has been made to solve the above problems, and even when there is a
shield between the voice controller and the speaker, the position of the speaker can be specified,
and furthermore, a camera or a radar device And the like, and an object of the present invention
is to provide a voice controller capable of reducing the cost of the product by eliminating the
need for expensive accessories such as
[0005]
In order to achieve the above object, according to the invention of claim 1, from the speaker
based on position specifying means connected to the speaker and specifying the position of the
speaker, and the position of the speaker specified by the position specifying means An audio
controller such as a television receiver including an output level control unit for controlling an
output level of the sound of the speaker, wherein the number of the speakers is two or more, and
the audio controller outputs the sound from each of the speakers A microphone array composed
of a plurality of microphones for collecting sound, an output control means for controlling so as
to output the same sound at the same volume level sequentially from each of the speakers, and
from each of the speakers by the output control means When controlled so as to output sound in
order, the sound output from each speaker reaches each microphone Incident direction
determining means for determining the direction of incidence of the sound output from each of
04-05-2019
2
the speakers to the center of the apparatus based on the difference in time until the time of The
incident direction of the sound output from one of the speakers to the center of the device body
(hereinafter abbreviated as the incident direction of the sound output from one speaker) is the
sound output from the other speaker to the center of the device body A detection means for
detecting that it is substantially the same as the incident direction (hereinafter abbreviated as the
incident direction of the sound output from the other speakers), and the incident direction of the
sound output from the one speaker by the detection means And display means for displaying a
message prompting adjustment of the arrangement of the speakers when detected as
substantially the same as the incident direction of the sound output from the other speakers,
further comprising: The identification means is controlled based on the time taken for the sound
output from each of the speakers to reach each of the microphones when the output control
means is controlled to output the sound from each of the speakers in order. The position of each
speaker is specified, and there is a shield between the voice controller and each speaker, and the
sound output from each speaker strikes a wall or the like, and the sound reflected from the wall
or the like is incident on each microphone Even in this case, the position of each speaker can be
specified.
[0006]
The invention according to claim 2 is an audio controller such as a television receiver provided
with an output level control means connected to a speaker and controlling an output level of
sound from the speaker based on a position up to the speaker. The audio controller further
comprises: a microphone for collecting sound output from the speaker; and output control means
for controlling the speaker to output a predetermined sound at a constant volume level, the
output level control The means is configured to control the relative distance from the speaker to
the microphone based on the level of the sound collected by the microphone when the output
control means is controlled to output the sound from the speaker in order. The output level of
the sound from the speaker is controlled based on the relative distance.
[0007]
The invention of claim 3 is the audio controller according to claim 2, wherein the number of
speakers is two or more, and the output control means outputs the same sound from the
speakers in order at the same volume level. , And control the output level of the sound from each
of the speakers based on the relative distance from each of the speakers to each of the
microphones.
[0008]
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3
According to the invention of claim 1, when sound is output from each speaker in order, the
position of each speaker is specified based on the time until the sound output from each speaker
reaches each microphone. Can.
Here, since the sound (wave) has the property of being reflected when it strikes a wall or the like,
there is a shield between the voice controller and each speaker, and the sound output from each
speaker is directly transmitted to each microphone. Even when the light does not enter into the
microphone, the sound reflected from the wall or the like enters into each microphone.
Therefore, even if there is a shield between the audio controller and each speaker, the position of
each speaker is specified based on the time it takes for the sound output from each speaker to be
reflected from the wall or the like to reach each microphone. can do.
Further, unlike the inventions of Patent Documents 1 and 2, the position of each speaker can be
specified without using expensive accessories such as a camera and a radar device, so that the
cost of the product can be reduced.
Furthermore, when it is detected that the incident direction of the sound output from one
speaker is substantially the same as the incident direction of the sound output from the other
speakers, a message prompting adjustment of the arrangement of these speakers is displayed. By
doing this, it is possible to increase the possibility that the surround effect can be obtained using
these speakers.
[0009]
According to the invention of claim 2, when the predetermined sound is output from the speaker
at a constant volume level, the relative distance from the speaker to the microphone is calculated
based on the level of the sound collected by the microphone, Based on this relative distance, the
output level of the sound from the speaker can be controlled. Here, since the sound (wave) has
the property of being reflected when it strikes a wall or the like, there is a shield between the
audio controller and the speaker, and the sound output from the speaker does not directly enter
the microphone Even in this case, the sound reflected from the wall or the like enters the
microphone. Therefore, even if there is an obstacle between the audio controller and the speaker,
the relative distance from the speaker to the microphone is calculated based on the level of the
sound collected by the microphone, and based on this relative distance You can control the
04-05-2019
4
sound output level of. The above relative distance is a relative distance from the speaker to the
microphone in consideration of the attenuation of the volume level when reflected from the wall
or the like. Further, unlike the inventions of Patent Documents 1 and 2, the position of each
speaker can be specified without using expensive accessories such as a camera and a radar
device, so that the cost of the product can be reduced.
[0010]
The best mode for carrying out the present invention will be described with reference to the
drawings. The present invention relates to an audio controller having a function of controlling
the output level of sound from a speaker, such as a television receiver, a video player, a DVD
(Digital Versatile Disc) player, and a hard disk player. In the following embodiments, an example
in which the present invention is applied to a digital television receiver will be described. The
embodiments described below do not cover the present invention, and the present invention is
not limited to the following embodiments.
[0011]
FIG. 1 shows the appearance of a digital television receiver which is an audio controller
according to the first embodiment. The digital television receiver 1 (hereinafter referred to as
DTV) of the first embodiment mainly corresponds to claims 2 and 3. The DTV 1 is connected to
the two speakers 3a and 3b, and has a microphone 2 for collecting the sound output from the
speakers 3a and 3b above the monitor 4. The DTV 1 outputs a predetermined sound at a
constant volume level from the speakers 3a and 3b, collects the sounds from the speakers 3a and
3b with the microphone 2, and based on the levels of these sounds, the speaker 3a, The relative
distance from 3b to the microphone 2 is calculated, and based on the calculated relative distance,
the output level of the sound from the speakers 3a, 3b is controlled.
[0012]
Next, with reference to FIG. 2, the electrical block configuration of the DTV 1 described above
will be described. The DTV 1 is connected to an antenna 8 and is provided with a tuner circuit 11
for receiving terrestrial digital television broadcasts and a video packet or audio packet of a
program selected by the user from the transport stream received by the tuner circuit 11. A
DEMUX 12 to be extracted, an MPEG decoder 13 for decoding an MPEG compressed video
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5
packet or audio packet sent from the DEMUX 12 to reproduce a video signal or an audio signal,
and a signal such as character information superimposed on the reproduced video signal An onscreen display unit 14 (hereinafter referred to as an OSD unit), a monitor 4 for displaying an
image based on a reproduced video signal, and speakers 3a and 3b for outputting an audio based
on the reproduced audio signal Have. These speakers 3a and 3b are disposed at a distance from
the DTV body 7 in order to obtain a surround effect.
[0013]
The DTV 1 also has a microprocessor 10 for controlling the entire apparatus. In addition to the
microphone 2, the tuner circuit 11 and the DEMUX 12, the microprocessor 10 further includes a
memory 18 for storing various data, an infrared signal receiving unit 20 for receiving an infrared
signal transmitted from the remote control 30, and Is connected. The data stored in the memory
18 includes a speaker output level adjustment PG 21 which is a program for adjusting the output
level of the sound from each of the speakers 3 a and 3 b and various setting data 22. The speaker
output level adjustment PG 21 and the microprocessor 10 correspond to the output level control
means and the output control means in claim 2.
[0014]
The remote control 30 has a key unit 35 composed of various keys and an infrared signal
transmission unit 31. In addition to the power key 33, the key 34 for number input, the cursor
key 36, and the selection key 37, the key section 35 is provided with a menu key 32 for
instructing display of various menus.
[0015]
Next, in addition to the flowchart of FIG. 3, the adjustment process of the output level of the
sound from each of the speakers 3a and 3b will be described with reference to FIG. The user
installs the speakers 3a and 3b at desired positions in the room 41 shown in FIG. 4, and then
uses the remote control 30 to execute the process of adjusting the output level of the sound from
the speakers 3a and 3b. When instructed, the microprocessor 10 of the DTV 1 controls the
speakers 3a and 3b to output the same sound at the same volume level in order (S1). Next, the
microprocessor 10 calculates the relative distance from the speakers 3a and 3b to the
microphone 2 based on the level of the sound collected by the microphone 2 from the sounds
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output from the speakers 3a and 3b (S2). And S3), based on the relative distance, the output level
of the sound from the speakers 3a, 3b is controlled (S4).
[0016]
Here, in general, the sound (wave) has the property of being reflected when it strikes a wall or
the like, and therefore, between the DTV 1 and the speaker 3a like the sound output from the
speaker 3a shown in FIG. Even if the sound output from the speaker 3a can not directly enter the
microphone 2, the sound V2 reflected from the wall 42 or the like is input to the microphone 2.
Therefore, even if there is a shield 43 between the DTV 1 and the speaker 3a, the relative
distance from the speaker 3a to the microphone 2 is calculated based on the level of the sound
collected by the microphone 2 and based on this relative distance. Can control the output level of
the sound from the speaker 3a. The above-mentioned relative distance is a relative distance from
the speaker 3 a to the microphone 2 in consideration of the attenuation of the volume level when
reflected from the wall 42 or the like. Therefore, as shown in FIG. 4, the distance V1 of the sound
V1 directly incident on the microphone 2 from the speaker 3b propagates in the air, while the
sound V2 incident on the microphone 2 reflects the wall 42 from the speaker 3a propagates in
the air Assuming that the sound V2 is reflected from the wall 42, assuming that it has the same
length as the distance, its volume level is attenuated, so the relative distance from the speaker 3a
corresponding to the sound V2 to the microphone 2 is The relative distance from the speaker 3 b
corresponding to V 1 to the microphone 2 is longer. Therefore, the microprocessor 10 makes the
output level of the sound from the speaker 3a larger than the output level of the sound from the
speaker 3b. Thereby, it is possible to control so that the sound of the output level in
consideration of the attenuation when reflecting from the wall 42 is output from the speaker 3a.
Further, unlike the inventions of Patent Documents 1 and 2 described in the Background Art
section, the positions of the speakers 3a and 3b can be specified without using expensive
accessories such as a camera and a radar device. The cost of the product can be reduced.
[0017]
Next, DTV1 which is an audio controller according to the second embodiment will be described.
The DTV 1 of the second embodiment mainly corresponds to claim 1. FIG. 5 shows the
appearance of the DTV 1 according to the second embodiment. In the drawing, the two speakers
3a and 3b are omitted, and only the appearance of the DTV main body 7 is shown. The DTV 1 of
the second embodiment has a microphone array configured of a plurality of microphones 2a to
2f for collecting the sound output from the speakers 3a and 3b, and is output from the speakers
3a and 3b. The position of each speaker can be specified based on the time it takes for the sound
04-05-2019
7
to reach each of the microphones 2a to 2f.
[0018]
The DTV 1 of the second embodiment has the same electrical block configuration as the DTV 1 of
the first embodiment shown in FIG. In the second embodiment, the speaker output level
adjustment PG 21 and the microprocessor 10 correspond to the position specifying unit, the
output level control unit, the output control unit, the incident direction determination unit, and
the detection unit in claim 1. The monitor 4 corresponds to the display means in claim 1.
[0019]
Next, the process of adjusting the output level of the sound from each of the speakers 3a and 3b
will be described with reference to FIGS. 7 to 9 in addition to the flowchart of FIG. In FIG. 7, only
one of the two speakers 3a and 3b is shown as the speaker 3 in order to simplify the story. When
the user inputs data of the room 41 shown in FIG. 7, the position of the DTV 1 in the room 41,
and the length L1 (the distance between the microphones 2a and 2b) using the remote control
30 (S11) The microprocessor 10 of the DTV 1 stores these input data as various setting data 22
in the memory 18. Then, the user installs the speakers 3a and 3b at the desired position in the
room 41 shown in FIG. 7, and then uses the remote control 30 to adjust the output level of the
sound from the speakers 3a and 3b. Is instructed, the microprocessor 10 of the DTV 1 controls
the speakers 3a and 3b to output the same sound at the same volume level in order (S12).
[0020]
Next, the microprocessor 10 determines the time until the sound output from each of the
speakers 3a and 3b reaches each of the microphones 2a to 2f and the level of the sound
collected by each of the microphones 2a to 2f. Whether the output sound from each of the
speakers 3a and 3b collected by each of the microphones 2a to 2f is the sound that has reached
each of the microphones 2a to 2f after being reflected by the wall 42 (hereinafter referred to as
the reflected sound from the wall 42) It determines (S13 and S14). As a result of this
determination, when the output sound from a certain speaker 3 collected by each of the
microphones 2a to 2f is not the reflected sound from the wall 42 (NO in S15), the sound output
from this speaker 3 The lengths of L2 and L3 shown in FIG. 7 are calculated based on the time
and sound velocity until each reaches each of the microphones 2a to 2f, and in addition to the
04-05-2019
8
data of these lengths, the DTV1 input in S11 The position of this speaker 3 is specified based on
the data of the position of L and the length of L1 (S17). In the above description, the position of
the speaker 3 is specified using the propagation distance L3 of the sound V3 incident on the
microphone 2a and the propagation distance L2 of the sound V4 incident on the microphone 2b.
Among the microphones 2a to 2f, the distance used for identification is the propagation distance
of the sound incident on the microphone (the first-incident microphone) to which the sound
output from the speaker 3 enters the earliest, It is desirable to use the distance traveled by the
sound incident on the microphones located at symmetrical positions with respect to (see FIG. 5).
[0021]
On the other hand, if the output sound from a certain speaker 3 collected by each of the
microphones 2a to 2f is a reflected sound from the wall 42 as a result of the determination in
S14 (YES in S15), the microprocessor 10, data of the room layout of the room 41 inputted in
S11, data of the position of the DTV 1 in the room 41, data of the length of L1, and the sound
outputted from the speaker 3 are transmitted to the microphones 2a to 2f. The position of the
speaker 3 is specified based on the difference in arrival time and the arrival order (S18).
[0022]
Next, the microprocessor 10 of the DTV 1 sets the center C of the apparatus main body of the
sound output from the speaker 3 based on the difference in time until the sound output from the
speaker 3 reaches each of the microphones 2a to 2f. Determine the incident direction to (see FIG.
5).
Then, as shown in FIG. 8, the incident direction W1 of the sound output from one speaker 3a to
the apparatus body center C is the incident direction W2 of the sound output from the other
speaker 3b to the apparatus body center C. It is determined whether or not it is substantially the
same as (S19). Specifically, whether the incident directions W1 and W2 are substantially the
same or not is determined, for example, that the microphone to which the sound output from one
of the speakers 3a is the earliest enters is output from the other speaker 3b. The determination
may be made based on whether the sound is equal to the microphone that enters the earliest or
not, or the incident angle θ 1 (the incident angle corresponding to the incident direction W 1) of
the sound output from one of the speakers 3 a ) And the incident angle θ2 (incident angle
corresponding to the incident direction W2) of the sound output from the other speaker 3b to
the device body center C is within a predetermined angle (for example, 30 degrees) It may be
determined based on heels.
04-05-2019
9
[0023]
As a result of the determination in S19, when the incident direction W1 of the sound from the
speaker 3a and the incident direction W2 of the sound from the speaker 3b are substantially the
same (YES in S19), the microprocessor 10 is shown in FIG. Then, a message is displayed on the
monitor 4 prompting adjustment of the arrangement of the speakers 3a and 3b (S20). 51 in FIG.
9 indicates the incident direction of the sound.
[0024]
On the other hand, when the incident direction W1 of the sound from the speaker 3a is different
from the incident direction W2 of the sound from the speaker 3b (NO in S19), the
microprocessor 10 selects the respective speakers specified in S17 and S18. Based on the
position of 3a, 3b, the output level of the sound from each speaker 3a, 3b is controlled (S21).
[0025]
As described above, according to the DTV 1 of the second embodiment, when sounds are
sequentially output from the speakers 3a and 3b, the sounds output from the speakers 3a and 3b
reach the microphones 2a to 2f. The position of each speaker 3a, 3b can be specified based on
the time until it takes place.
Here, since the sound (wave) has the property of being reflected when it strikes a wall or the like,
a shield 43 is present between the DTV 1 and each of the speakers 3a, 3b, and is output from
each of the speakers 3a, 3b. Even when the sound does not directly enter the microphones 2a to
2f, the sound reflected from the wall or the like enters the microphones 2a to 2f. Therefore, even
when there is a shield 43 between the DTV 1 and each of the speakers 3a, 3b, it is possible to
reflect the sound output from each of the speakers 3a, 3b from the wall etc. and reach the
microphones 2a to 2f. Based on the position of each speaker 3a, 3b can be specified. Further,
unlike the inventions of Patent Documents 1 and 2, the positions of the speakers 3a and 3b can
be specified without using expensive accessories such as a camera and a radar device, so that the
cost of the product can be reduced. Can. Furthermore, when it is detected that the incident
directions of the sounds output from the two speakers 3a and 3b are substantially the same, a
message prompting the adjustment of the arrangement of the speakers 3a and 3b is displayed. It
is possible to increase the possibility that the surround effect can be obtained by using these
speakers 3a and 3b.
04-05-2019
10
[0026]
The present invention is not limited to the above embodiment, and various modifications are
possible. For example, although each of the above embodiments shows an example in which the
present invention is applied to DTV, an audio controller to which the present invention is applied
is not limited to this. For example, a video player, DVD (Digital Versatile Disc) ) It may be various
players and recorders such as a player and a hard disk player. Moreover, although the example in
case the number of speakers is two was shown in said each embodiment, the number of speakers
may be how many. Furthermore, in the second embodiment, an example in which six
microphones are included in the microphone array has been described, but the number of
microphones included in the microphone array is not limited thereto. The arrangement of the
microphones to be configured is not limited to that shown in FIG.
[0027]
BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the external
appearance of DTV which is an audio | voice controller by the 1st Embodiment of this invention.
The electric block block diagram of said DTV. The flowchart which shows the adjustment process
of the output level of the sound from each speaker by said DTV. Explanatory drawing of
adjustment processing of the output level of the sound from said each speaker. The perspective
view which shows the external appearance of DTV which is an audio | voice controller by the 2nd
Embodiment of this invention. The flowchart which shows the adjustment process of the output
level of the sound from each speaker by said DTV. Explanatory drawing of the identification
method of the position of each said speaker. Explanatory drawing of the determination method of
whether the incident direction to the apparatus main body of the sound output from said each
speaker is substantially the same. The figure which shows the message which urges arrangement
adjustment of each above-mentioned speaker.
Explanation of sign
[0028]
Reference Signs List 1 DTV (audio controller) 2 microphone 3 speaker 4 monitor 10
microprocessor (position specifying unit, output level control unit, output control unit, incident
direction determination unit, and detection unit) 21 speaker output level adjustment PG (position
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specifying unit, output Level control means, output control means, incident direction
determination means, and detection means) 2a to 2f microphone 3a speaker 3b speaker
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