close

Вход

Забыли?

вход по аккаунту

?

JP2007049413

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 JP2007049413
PROBLEM TO BE SOLVED: To use a listening position inspection method, a listening position
inspection system, and this system capable of inspecting a difference between a listening position
of a reference output from each speaker and a listening position of an actual listener with little
error It aims at providing a speaker apparatus. SOLUTION: A step of disposing a microphone 3a
at a position p2 where a listener listens to voices from a plurality of speakers su1 and su8, an
inspection audio signal of a predetermined pulse width at a constant frequency from a plurality
of speakers su1 and su8 Voice input to the plurality of speakers su1 and su8 at the same time
setting to reach the reference listening position simultaneously, the pulse width of the
synthesized voice signal received from the plurality of speakers su1 and su8 received by the
microphone 3a, and the test voice And D. comparing the pulse width of the signal and detecting a
deviation between the position of the microphone and the listening position of the reference
based on the comparison. [Selected figure] Figure 2
Method of inspecting listening position, listening position inspection system, and speaker
apparatus used for this system
[0001]
The present invention is used in a listening position inspection method, a listening position
inspection system, and a system for inspecting a difference between a reference listening
position where a plurality of speakers directs voice and outputs voice and a position where an
actual listener listens for voice. The present invention relates to a speaker device.
[0002]
04-05-2019
1
In a system consisting of a plurality of speakers such as a multi-channel audio system or a
speaker array device, the time for the sound to reach the listening position is not limited to an
equal distance between the listener listening position and the plurality of speakers. It differs from
one to another.
In order to eliminate this unbalance, it is common practice to add a delay (delay time) to audio
signals input to these speakers so that the sound from each speaker reaches the listening
position simultaneously.
[0003]
The delay applied to each audio signal is determined according to the distance from each speaker
to the listening position. Therefore, a positional relationship such as a distance from a
predetermined listening position to each speaker is determined, and a delay to be applied to each
audio signal is set based on the distance.
[0004]
However, the listener does not necessarily listen to the sound at a predetermined listening
position. When listening at a position other than the listening position, even if the distance
between each speaker and the listening position is obtained in advance, a deviation occurs in the
arrival timing of the sound at the actual listening position of the listener. In order to solve this
disadvantage, a method for inspecting this deviation has been proposed (see, for example, Patent
Document 1).
[0005]
In the conventional inspection method of the listening position of the reference, the listener is
described as a microphone (hereinafter, "microphone") at the actual listening position of the
listener. Place). Then, impulses are sequentially output from the speakers to the reference
listening position. Each time (time t) from the time of this output to the time when the voice
reaches the microphone is acquired.
04-05-2019
2
[0006]
As described above, the delay of the audio signal input to each speaker is set so that each sound
reaches the reference listening position at the same time. For this reason, when there is no
deviation between the position of the microphone and the reference listening position, the times t
of the respective sounds become substantially the same. Therefore, it is possible to check
whether there is a difference between the reference listening position and the actual listening
position of the listener based on whether the time t for the sound from each speaker to reach is
substantially the same. Unexamined-Japanese-Patent No. 4-370000
[0007]
However, since the environmental sound contains a component similar to an impulse, in the
conventional listening position inspection method, noise may be erroneously detected as an
inspection signal, and an error may occur in the inspection result. In order to solve this problem,
it is conceivable to use a filter such as a band pass filter to pass only the frequency band of the
test signal among the input signals to the microphone. However, since the impulse has a wide
frequency spectrum, it is impossible to separate only the test signal from the input signal of the
microphone using a filter.
[0008]
Therefore, in order to solve the above-mentioned problems, the present invention is a method of
inspecting a listening position capable of inspecting the difference between the listening position
of the reference output from each speaker and the actual listening position of the listener with
little error. It is an object of the present invention to provide a listening position inspection
system and a speaker device used in this system.
[0009]
In order to solve the above-mentioned subject, the following means are adopted in the present
invention.
[0010]
(1) The present invention comprises the steps of disposing a microphone at a position where a
listener listens to audio from a plurality of speakers, listening to a test audio signal of a
04-05-2019
3
predetermined pulse width at a constant frequency and listening to a reference from the plurality
of speakers. Comparing the pulse width of the synthesized voice signal received from the
plurality of speakers received by the microphone with the pulse width of the test voice signal,
with the step of inputting to the plurality of speakers at the timing setting at which the voice
reaches the position simultaneously And detecting the deviation between the position of the
microphone and the listening position of the reference based on this comparison.
[0011]
According to the above configuration, the microphone is disposed at a position where the listener
listens to the sound from the plurality of speakers.
Then, at the timing setting in which the voices simultaneously reach the reference listening
position from the plurality of speakers, the test audio signals having a predetermined pulse width
and a predetermined frequency are input to the plurality of speakers.
Test sound is output from the plurality of speakers to which the test sound signal is input.
These test sounds are collected by a microphone.
[0012]
Here, since the voices from the plurality of speakers reach the reference listening position at the
same time, the timing at which the test voice from each speaker arrives is shifted as the deviation
between the reference listening position and the position of the microphone is larger. Therefore,
the pulse width of the synthesized speech signal of the collected test speech is longer than the
pulse width of the test speech signal.
[0013]
Therefore, the pulse width of the synthetic speech signal received from the plurality of speakers
received by the microphone is compared with the pulse width of the test speech signal, and the
04-05-2019
4
comparison detects the deviation between the position of the microphone and the reference
listening position. . In this way, it is possible to check the deviation between the actual listening
position and the reference listening position. As described above, since the inspection audio
signal of a constant frequency is used to inspect the deviation between the actual listening
position and the reference listening position, it becomes easy to separate the inspection audio
from the input signal of the microphone. Therefore, it is possible to effectively prevent the noise
component from being erroneously detected as the inspection voice.
[0014]
(2) The present invention comprises a speaker device provided with an array speaker having a
plurality of speaker units, and a terminal device provided with a microphone for collecting sound
from the speaker device, the speaker device comprising the plurality of speaker units An input
unit for inputting, to at least two of the speaker units, an inspection audio signal having a
predetermined frequency and a predetermined pulse width at a timing setting at which voices
from these speaker units simultaneously reach a reference listening position; A signal receiving
unit for receiving a communication signal from the terminal device, the notification signal
indicating the pulse width of the synthesized voice signal from the at least two speaker units
received by the microphone from the terminal device; The pulse width of the synthetic speech
signal indicated by the received notification signal, and the test speech signal The inspection
apparatus includes an inspection unit which checks a deviation between the position of the
microphone and the listening position of the reference by comparing with a pulse width, and the
terminal device extracts the audio signal of the constant frequency from the audio signal
collected by the microphone And a signal transmission unit for transmitting the notification
signal to the speaker device when the component of the synthetic speech signal is extracted by
the extraction unit. It is a listening position inspection system characterized by things.
[0015]
In addition, since the array speaker of this invention has a speaker unit arranged in line form, the
thing by which the speaker unit was arranged in matrix form or honeycomb form is also
included.
[0016]
(3) The present invention is a speaker apparatus provided with a function of receiving a signal
from a terminal apparatus provided with a microphone, which is an array speaker having a
plurality of speaker units, and at least two speakers among the plurality of speaker units. An
input unit for inputting an inspection audio signal having a predetermined frequency and a
predetermined pulse width at a timing setting at which voices from these speaker units
simultaneously reach a reference listening position to the unit; A signal receiving unit for
04-05-2019
5
receiving, from the terminal device, a notification signal indicating the pulse width of the
synthesized voice signal from the at least two speaker units received by the microphone, and an
indication of the received notification signal The pulse width of the synthetic speech signal is
compared with the pulse width of the test speech signal to With an inspection unit for inspecting
the position of the emission and the deviation between the listening position of the reference, it is
speaker apparatus according to claim.
[0017]
According to the configurations of the above (2) and (3), the speaker device includes an array
speaker having a plurality of speaker units.
Then, with respect to at least two speaker units out of a plurality of speaker units, an audio signal
for inspection having a predetermined frequency and a predetermined pulse width at a timing
setting at which the sound from these speaker units simultaneously reaches the reference
listening position. Is input by the input unit.
As a result, the test sound is output from the speaker unit at the end and the speaker unit at the
other end.
Then, the test sound simultaneously arrives at the reference listening position.
[0018]
The terminal device comprises a microphone. Both test sounds from the at least two speaker
units are input to the microphone at a timing shifted as the gap between the position of the
microphone and the listening position of the reference is larger. For this reason, the synthetic
speech signal of both test speeches becomes long.
[0019]
In the terminal device, when the test audio is received from the at least two speaker units, a
notification signal indicating the pulse width of the combined voice signal from the two speaker
units received by the microphone is transmitted to the speaker device by the signal transmission
04-05-2019
6
unit Be done.
[0020]
In the speaker device, the notification signal is received from the terminal device by the signal
receiving unit.
Then, the inspection unit compares the pulse width of the synthesized speech signal indicated by
the received notification signal with the pulse width of the inspection speech signal, and by this
comparison, the deviation between the microphone position and the reference listening position
is inspected. Ru.
[0021]
As described above, the difference between the actual listening position and the reference
listening position is checked using the test audio signal of a constant frequency. For this reason,
it becomes easy to separate the test speech from the input signal by extracting the component of
the constant frequency from the input signal of the microphone by the extraction unit. Therefore,
it is possible to effectively prevent the noise component from being erroneously detected as the
inspection voice.
[0022]
Here, in the array speaker, an audio signal to which a delay time is added is input so that the
sound from each speaker unit simultaneously reaches the reference listening position. This
enables the sound beam from the array speaker to be directed to the reference listening position
and to be heard only by a specific listener. However, the actual listening position may be
different from the reference listening position due to movement of the listener. For this reason, it
becomes possible to detect that the position to which the sound beam should be directed has
changed by examining the deviation between the reference listening position and the actual
listening position. By detecting this, it is possible to check whether the setting of each delay time
is appropriate.
04-05-2019
7
[0023]
According to the present invention, the inspection audio can be separated from the input signal
of the microphone in order to inspect the deviation between the actual listening position and the
reference listening position using the inspection audio signal of a constant frequency. Therefore,
it is possible to effectively prevent the noise component from being erroneously detected as the
inspection voice. This makes it possible to measure the deviation between the reference listening
position and the actual listening position relatively accurately.
[0024]
An inspection system 1 according to an embodiment of the present invention will be described
with reference to FIGS. 1 to 6. FIG. 1 is a view showing the appearance of an inspection system 1
according to the present embodiment. This external view is a view of the inspection system 1 as
viewed from above. The inspection system 1 describes the speaker device 2 and a remote
controller 3 having a function of operating the speaker device 2 (hereinafter, referred to as
“remote control 3”). )とからなる。
[0025]
The speaker device 2 includes an array speaker 2a formed of speaker units su arranged in a line.
By giving delay times shown by the arrows in the figure to each audio signal input to these
speaker units su, an audio beam is output from the array speaker 2a in a predetermined
directivity direction and directivity range.
[0026]
That is, a delay time is added to each audio signal so that the sound output from each speaker
unit su simultaneously reaches the focal point p. As a result, a voice beam synthesized with voice
signals from the respective speaker units su (su1 to su8) is output to the focal point p. By setting
the listening position at which the listener listens to the sound from the speaker device 2 to this
focal point p, the sound beam can be made to reach only the listening position of the listener.
This allows only the specific listener at the listening position to hear the audio.
04-05-2019
8
[0027]
As described above, in order for only a specific listener to listen to desired audio (audio content)
from the speaker device 2, a delay time to each audio signal based on the distance from the
listening position of the listener to each speaker unit su Are set in advance in the speaker device
2. In the process of setting the delay time (delay time setting process), the distance from the
listening position to the speaker units su (su1 and su8) at both ends is measured by the speaker
device 2, and the delay time is calculated from the measured distance. Set
[0028]
As a specific example of this delay time setting process, the listener arranges the remote control
3 at the listening position in advance. The remote control 3 is provided with a microphone 3a.
Then, the speaker device 2 outputs measurement sound in order from the speaker units su1 and
su8. The time until the input time when the sound output from the speaker units su1 and su8 is
input to the microphone 3a is multiplied by the speed of sound. Thereby, the distance from the
listening position to the speaker unit su1 and the speaker unit su8 can be measured. Each delay
time is calculated using this distance.
[0029]
As described above, the speaker device 2 can set each delay time of the audio signal input to
each speaker unit su, and thereby can direct the sound beam to a listening position
corresponding to the delay time and output it. However, the listener may move and the listening
position may change. In this case, the sound beam output from the speaker device 2 is not
directed to the actual listening position of the listener.
[0030]
For this reason, the inspection system 1 describes a reference listening position corresponding to
a preset delay time (hereinafter, referred to as a listening position p1. And listener's actual
listening position (hereinafter referred to as listening position p2). ) Has a function of performing
processing (inspection processing) for inspecting deviation from the above. The speaker device 2
04-05-2019
9
changes the setting of the delay time so as to reduce the displacement based on the displacement
thus inspected.
[0031]
Below, the inspection process which the inspection system 1 performs is demonstrated using
FIG.2 and FIG.3. FIG. 2 is a diagram showing how the speaker device 2 outputs the test sounds
s1, s2 in the test process. FIG. 3A is a diagram showing the waveform of the test audio signal x1,
and FIGS. 3B and 3C are waveforms of the synthesized voice signal x2 of the test voices s1 and
s2 inputted by the microphone 3a. It is.
[0032]
In this inspection process, as shown in FIG. 2, the listener places the remote control 3 at the
actual listening position p2. The listening position p2 on the left side in the figure is the same
position as the listening position p1. Further, the listening position p2 on the right side in the
figure is shifted from the listening position p1. The remote control 3 incorporates the
microphone 3a as described above. Then, the same test audio signal x1 is input to the speaker
unit su1 at the end of the speaker device 2 and the speaker unit su8 at the other end. As shown
in FIG. 3A, the test audio signal x1 has a constant frequency fr and a predetermined pulse width
tr.
[0033]
The frequency fr is preferably high enough to have a clear rise and low enough not to show
directivity, for example, preferably in the range of 5 to 20 kHz. Within this range, in particular,
10 kHz is preferable. In addition, even if the pulse width tr reaches the listening position p2 at
the timing at which the inspection audio s1 from the speaker unit su1 and the inspection audio
s2 from the speaker unit su8 are most deviated, both of these audios s1 , And s2 are preferably
large enough not to be input to the microphone 3a.
[0034]
For example, the lower limit value of the pulse width tr can be calculated by the following
equation (1).
04-05-2019
10
[0035]
tr ≧ 2 L / C (1) In the above equation, L is the distance between the speaker unit su1 and the
speaker unit su8, and C is the velocity of sound.
[0036]
According to the above equation, when the distance L is 1 m, the lower limit of the pulse width tr
is preferably about 6 ms.
Therefore, in this case, the pulse width tr is preferably in the range of 6 to 50 msec.
Among these ranges, in particular, 10 msec is preferable.
[0037]
The test audio signal x1 is input after being given a delay time. As described above, this delay
time is set so that the sound from each of the speaker units su1 to su8 simultaneously reaches
the listening position p1. Therefore, the inspection voice s1 from the speaker unit su1 and the
inspection voice s2 from the speaker unit su8 reach the listening position p1 at the same timing.
[0038]
Therefore, when the listening position p1 and the actual listening position p2 do not deviate as in
the listening position p2 on the left side in FIG. 2, the inspection voice s1 and the inspection
voice s2 reach the listening position p2 simultaneously. Therefore, as shown in FIG. 3B, the pulse
width ta of the voice signal (synthesized voice signal x2) obtained by combining the test voice s1
and the test voice s2 input to the microphone 3a is the test voice signal. It should be the same as
or close to the pulse width tr of x1.
[0039]
04-05-2019
11
On the other hand, when the listening position p1 and the actual listening position p2 deviate
from each other as in the right listening position p2 in FIG. 2, the test sounds s1 and s2 do not
reach the listening position p2 simultaneously. Therefore, as shown in FIG. 3C, the pulse width ta
of the synthetic speech signal x2 should be longer than the pulse width tr of the test speech
signal x1.
[0040]
As described above, in the inspection process, the deviation between the listening position p1
and the actual listening position p2 is inspected by comparing the pulse width ta of the synthetic
speech signal x2 with the pulse width tr of the inspection speech signal x1. . As described above,
the test audio signal x1 is an audio signal of a constant frequency fr. For this reason, if the
remote control 3 extracts the audio signal in the frequency band of the constant frequency fr
from the input signal from the microphone 3a, only the components of the inspection audio s1
and s2 can be output from the input signal.
[0041]
This effectively prevents the noise component input to the microphone 3a from being
erroneously detected as the inspection voices s1 and s2. Therefore, it is possible to accurately
measure the deviation between the listening position p1 and the actual listening position p2. The
specific processing of the speaker device 2 and the remote control 3 in this inspection processing
will be described later in detail using FIGS. 5 and 6.
[0042]
FIG. 4 is a block diagram showing the configuration of the inspection system 1 shown in FIG. The
configuration of the speaker device 2 will be described below. The speaker device 2 includes an
audio input control unit 21, a signal processing unit 22, an amplification unit 23, an infrared
light receiving unit 24, and a controller 25 in addition to the above-described array speaker 2 a.
[0043]
04-05-2019
12
The audio input control unit 21 is an interface circuit for inputting a digital audio signal (audio
content) from an audio reproduction apparatus connected to the input terminal 26. The audio
input control unit 21 inputs the input audio signal to the signal processing unit 22.
[0044]
The signal processing unit 22 is realized by a DSP (Digital Signal Processor) or the like. The
signal processing unit 22 performs predetermined audio signal processing such as equalization
on the input audio signal. The signal processing unit 22 separates the input audio signal into the
number of the speaker units su.
[0045]
In the signal processing unit 22, various parameters (delay control value, level control value, etc.)
for adjusting an audio signal from the controller 25 are set. Then, the signal processing unit 22
performs processing of adjusting the output level of the separated audio signal based on this
parameter and processing of providing a delay time. Here, the purpose of giving a delay time to
the audio signal is to direct the sound beam to the listening position p1 as described above with
reference to FIG. 1 (see the arrow in FIG. 1). This delay time is previously set before playing the
desired audio content of the listener, as described above.
[0046]
The signal processing unit 22 inputs the audio signal subjected to the above processing to the
corresponding amplification unit 23. A plurality of amplifying units 23 are provided in
association with the respective speaker units su1 to su8. In order to distinguish these
amplification units 23, the same numerals as the corresponding speaker units su1 to su8 are
given and described as amplification units 231 to 238.
[0047]
04-05-2019
13
The amplification units 231 to 238 amplify the output level of the input audio signal according
to the instruction of the signal processing unit 22. The amplification units 231 to 238 input the
amplified audio signals to the corresponding speaker units su1 to su8. As a result, voices are
output from the speaker units su1 to su8, and a voice beam which is a synthesized voice of the
voices is directed to the listening position p1.
[0048]
The infrared light receiving unit 24 includes an infrared light receiving element or the like, and
receives a command signal which is infrared light from the remote control 3. Then, the infrared
light receiving unit 24 converts the received command signal into an electric signal and inputs
the electric signal to the controller 25.
[0049]
The controller 25 is realized by a CPU (Central Processing Unit) or the like, and controls the
operation of each unit of the speaker device 2. The controller 25 sets parameters in the signal
processing unit 22 based on the command signal input from the infrared light receiving unit 24.
Thus, the controller 25 controls the audio signal processing of the signal processing unit 22. For
example, the command signal includes a delay time setting command signal for executing the
above-described delay time setting process, and a command signal for reproducing an audio
signal from an audio reproduction apparatus (not shown) connected to the input terminal 28. .
[0050]
In addition, there is a command signal for executing an inspection process on the speaker side.
When this command signal is input, the inspection process on the speaker side is performed
using the signal processing unit 22, the amplification unit 23, and the array speaker 2a. In this
inspection process on the speaker side, the inspection audio signal x1 having a predetermined
pulse width tr at a constant frequency fr as described above is input to the speaker units su1 and
su8 with a set delay time. Then, the signal between the listening position p1 and the listening
position p2 is inspected using the signal received from the remote control 3 for acquiring the
pulse width ta of the synthetic speech signal x2. The inspection process on the speaker side will
be described later in detail.
04-05-2019
14
[0051]
The inspection process may be performed by the audio content output process and multitasking
when the command signal for reproducing the audio signal is input, not when the command
signal for performing the inspection process is input. Also, the inspection process may be
performed continuously after the delay time setting process is performed.
[0052]
Next, the configuration of the remote control 3 will be described. The remote controller 3
includes an infrared light emitting unit 31, an operation unit 32, a remote control control unit
33, and a waveform shaping unit 34 in addition to the microphone 3a described above. The
infrared light emitting unit 31 includes an infrared light emitting element or the like, and outputs
a command signal according to the input command code as infrared light. The operation unit 32
includes a plurality of operation buttons 321, and when the operation button is pressed by a
finger or the like, the operation of the listener is received. The operation unit 32 inputs an
operation signal indicating the operation button 321 pressed by the listener to the remote
control unit 33.
[0053]
The remote control unit 33 is realized by a microcomputer or the like and controls the operation
of each unit of the remote control 3. The remote control unit 33 stores command codes
corresponding to the operation buttons 321. Then, when the operation signal is input, the remote
control control unit 33 specifies a command code corresponding to the operation button 321
indicated by the operation signal, and inputs the specified command code to the infrared light
emitting unit 31.
[0054]
For example, when the operation button 321 for inspecting the deviation between the listening
position p1 and the listening position p2 is pressed and an operation signal indicating this is
received, the remote control controlling unit 33 performs an inspection process on the speaker
04-05-2019
15
device 2 Command code for executing the command is input to the infrared light emitting unit
31. Then, the infrared light emitting unit 31 outputs this command code as a command signal.
[0055]
The remote control unit 33 executes the stored program to execute inspection processing on the
remote control side. The remote control side inspection process is a process of inspecting a
deviation between the listening position p1 and the listening position p2. As described above, in
the speaker device 2, the test sounds s1 and s2 (FIG. 2) are output from the speaker units su1
and su8. In the inspection processing on the remote control side, when the synthesized speech
signal x2 of the inspection speech s1 and s2 is input, a notification signal for notifying the pulse
width ta of the synthesized speech signal x2 is output using the infrared light emitting unit 31
Do. The inspection process on the remote control side will be described later in detail.
[0056]
The waveform shaping unit 34 receives an audio signal collected by the microphone 3 a. The
waveform shaping unit 34 includes a filter such as a band pass filter. In this filter, a frequency
band of the frequency fr of the test audio signal x1 is set. The waveform shaping unit 34
separates only the synthetic speech signal x2 from the input signal by letting the filter pass the
input signal. Then, the waveform shaping unit 34 inputs the separated synthesized speech signal
x2 to the remote control control unit 33. As a result, the remote control unit 33 is effectively
prevented from erroneously detecting the noise component as the audio signal of the inspection
voice.
[0057]
FIG. 5 is a flowchart showing an example of the inspection process performed by the inspection
system 1 of FIG. First, in the speaker device 2, when a command signal instructing the execution
of inspection processing is input, the controller 25 instructs the signal processing unit 22 to
generate the inspection audio signal x 1. In response to this instruction, the signal processing
unit 22 generates a test audio signal x 1, adds a set delay time, and inputs it to the amplification
units 231 and 238.
04-05-2019
16
[0058]
The inspection audio signal x1 is input to the speaker unit su1 via the amplification unit 231. At
the same time, the signal is input to the speaker unit su8 via the amplification unit 231. The
speaker unit su1 converts the test audio signal x1 into a test audio s1 and outputs it. From the
speaker unit su8, the test audio signal x1 is converted to the test audio s2 and output (S1).
[0059]
The remote controller 3 repeatedly determines, at predetermined time intervals, whether or not
the remote control unit 33 has started inputting the synthetic speech signal x2 (S2). Here, the
waveform shaping unit 34 passes only the frequency band of the inspection audio signal x 1
among the input signals from the microphone 3 a and inputs the signal to the remote control
control unit 33. For example, when the input of the audio signal is started at a predetermined
level or more, the remote controller control unit 33 determines that the input of the synthetic
audio signal x2 is started.
[0060]
When it is determined that the input of the synthetic speech signal x2 is started (YES in S2), the
remote control unit 33 starts counting by a built-in timer (not shown) (S3). Thereafter, the
remote controller control unit 33 repeatedly determines at predetermined time intervals whether
or not the input of the synthetic speech signal x2 is ended until the input of the synthetic speech
signal is ended (S4). The end of the input of the synthetic speech signal x2 is judged by whether
or not the input of a signal of a predetermined level or more is lost.
[0061]
If it is determined that the input of the synthetic speech signal x2 is completed (YES in S4), the
remote control unit 33 ends the clocking (S5). Then, the remote control control unit 33 generates
time length information (notification signal) with the counted time as the pulse width ta (S6). The
remote control control unit 33 transmits this time length information using the infrared light
emitting unit 31 (S7).
04-05-2019
17
[0062]
In the speaker device 2, after execution of step S 1, the controller 25 repeatedly determines at
predetermined time intervals whether the time length information has been received by the
infrared light receiving unit 24 and waits until it determines YES (S 8). If it is determined that the
time length information has been received (YES in S8), the controller 25 compares the pulse
width tr of the test audio signal with the pulse width ta indicated by the time length information
(S9).
[0063]
The controller 25 changes the parameter (setting of delay time) set in the signal processing unit
22 based on the comparison result (S10). In the setting change of the delay time, the pulse width
tr and the pulse width ta are changed to values close to each other. Note that the process of
measuring the pulse width of the synthetic speech signal x2 in steps S1 to S9 and the setting
change of the delay time are repeated to complete the setting with the delay time that the pulse
width of the synthetic speech signal x2 becomes the shortest. It is also good.
[0064]
FIG. 6 is a flowchart showing an example of inspection processing different from the inspection
processing shown in FIG. In the figure, the steps in which the same process as the inspection
process shown in FIG. When the remote controller 3 determines that the input of the synthetic
speech signal x2 has been started (YES in S2), the remote controller control unit 33 uses the
infrared light emitting unit 31 to notify the start notification (notification signal) for notifying the
start. Send (S11). Then, when it is determined that the input of the synthetic speech signal x2 is
ended (YES in S4), the remote control control unit 33 transmits an end notification for notifying
this end using the infrared light emitting unit 31 (S12) .
[0065]
In the speaker device 2, after step S1 is executed and the inspection voices s1, s2 are output, the
controller 25 receives a start notification from the remote control 3 by the infrared light
04-05-2019
18
receiving unit 24. The determination is repeated every time (S13). If it is determined that the
start notification has been received, the controller 25 starts timing by the built-in timer (not
shown) (S14).
[0066]
Thereafter, the controller 25 repeatedly determines, at predetermined time intervals, whether or
not this reception has been made until the end notification is received by the infrared light
emitting unit 24 (S15). If it is determined that the end notification has been received (YES in
S15), the controller 25 ends the clocking (S16). Then, the controller 25 stores this clocking time
(S17). Thereafter, the controller 25 obtains the pulse width ta from the stored timekeeping time.
The controller 25 compares the pulse width ta with the pulse width tr of the test audio signal x1
(S18).
[0067]
Then, in step S10, parameter settings of the signal processing unit 22 are changed based on the
comparison result.
[0068]
Although the inspection process shown in FIG. 5 can not be executed without the timing means
on the remote control 3 side, in the above-described inspection process, even if there is no timing
means on the remote control 3 side, the pulse of the inspection audio signal x1 in the speaker
device 2 The width tr can be notified.
[0069]
As described above, in the inspection system 1 according to the present embodiment, the
deviation between the listening position p1 and the actual listening position p2 is made by
comparing the pulse width of the inspection audio signal x1 with the pulse width of the synthetic
audio signal x2. To check.
Here, the inspection audio signal x1 is an audio signal of a constant frequency fr.
04-05-2019
19
Therefore, by extracting the frequency band of the frequency fr from the input signal of the
microphone 3a on the remote control 3 side, it is possible to extract only the components of the
inspection voices s1 and s2.
[0070]
As a result, by erroneously detecting the noise as the inspection voices s1 and s2, the occurrence
of the erroneous inspection is effectively prevented. Therefore, the deviation between the
listening position p1 and the actual listening position p2 can be measured with high accuracy.
[0071]
In addition, it is possible to inspect the deviation between the listening position p1 and the
listening position p2 in only one measurement only for measuring the pulse width of the
synthetic speech signal x2.
[0072]
The following modifications can be employed in the present embodiment.
[0073]
(1) In the present embodiment, the setting of the delay time is changed according to the
difference between the listening position p1 and the actual listening position p2. However, the
present invention is not limited to this.
The configuration may be such that the inspection result with or without positional deviation is
notified by voice or display without changing the setting of the delay time.
[0074]
(2) In addition, although the structure of the array speaker 2a consists of the speaker units su1
to su8 arranged in line form, it is not limited to this structure.
04-05-2019
20
That is, the number of speaker units su is not limited to eight, and it is sufficient that the number
of sound beams can be output. Moreover, it may be comprised from the speaker unit su arranged
not in a line form but in the matrix form or the zigzag form.
[0075]
(3) In addition, it is not limited to inputting a test | inspection audio | voice signal to speaker unit
su1 and su8, What is necessary is just to be input to at least 2 speaker unit su. However, since
the inspection can be performed more accurately as the distance between the two speaker units
su for inputting the inspection audio signal increases, it is preferable to input the inspection
audio signal to the speaker units su1 and su8 at both ends. .
[0076]
(4) Also, the speaker device 2 may not be an array speaker. The inspection method of the present
invention can be applied as long as audio is output so as to simultaneously reach the reference
listening position from a plurality of normal speakers that are not array speakers.
[0077]
(5) Also, the remote control 3 may not have the microphone 3a built-in. An external microphone
3a may be connected to the remote control 3, and the microphone 3a may be disposed at the
listening position p2. Furthermore, the present invention is not limited to the remote controller 3
and may be another terminal device (for example, a general-purpose device or the like) capable
of inputting a signal from the microphone 3 a and having a function of communicating with the
speaker device 2.
[0078]
(6) In addition, although the speaker device 2 includes a functional unit that performs signal
processing on an audio signal, this functional unit may be provided in a separate audio device.
That is, the audio device may perform signal processing on the audio signal, and the audio signal
04-05-2019
21
after the signal processing may be input to the speaker.
[0079]
It is a figure showing the appearance of the inspection system concerning this embodiment. It is
a figure which shows a mode that a speaker apparatus outputs test | inspection audio | voice s1
and s2 in an inspection process. (A) is a figure which shows test | inspection audio | voice signal
x1 as an analog signal, (b) and (c) are the figures which showed synthetic speech signal x2 of test
speech s1, s1 which were input with the microphone as an analog signal is there. It is a block
diagram which shows the structure of the inspection system 1 shown in FIG. It is a flowchart
which shows an example of the test | inspection process which the test | inspection system 1 of
FIG. 3 performs. It is a flowchart which shows an example of the test | inspection process
different from the test | inspection process shown in FIG.
Explanation of sign
[0080]
1-Inspection System 2-Speaker Device 2a-Array Speaker 3-Remote Controller (Terminal Device)
3a-Microphone 23-Amplifier (Input) 24-Infrared Light Receiver (Signal Receiver) 25-Controller
(Tester, Acquisition) ) 31-infrared light emitting unit (signal transmission unit) 34-waveform
shaping unit (extraction unit) p 1-listening position (reference listening position) p 2-listening
position (position where listener listens to audio) su-speaker unit su 1-speaker Unit (Speaker unit
at end, multiple speakers) su8-Speaker unit (speaker unit at other end, multiple speakers) tapulse width tr-pulse width x 1-test audio signal x1, x2-test audio x2 -Synthetic speech signal
04-05-2019
22
Документ
Категория
Без категории
Просмотров
0
Размер файла
35 Кб
Теги
jp2007049413
1/--страниц
Пожаловаться на содержимое документа