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JP2006270184

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DESCRIPTION JP2006270184
PROBLEM TO BE SOLVED: To make it easy to grasp the output characteristics of each speaker
and to diagnose the presence or absence of a failure in a speaker array having a plurality of
speakers arranged in a plane. SOLUTION: In an audio input / output device provided with a
speaker array configured of a plurality of speakers, each speaker functions as a microphone, and
output from each speaker when sound emitted from a predetermined sound source is received
Identification means for analyzing the electric signal output from the storage means in which the
characteristic data representing the signal waveform of the electric signal to be stored is stored
in advance and the speaker receiving the sound emitted from the sound source and specifying
the signal waveform When there is a speaker where the signal waveform is not specified by the
specifying means, or the difference between the signal waveform specified by the specifying
means and the signal waveform represented by the characteristic data stored in the storage
means is a predetermined threshold value And a notification means for notifying that effect when
there is a speaker exceeding. [Selected figure] Figure 1
Voice input / output device
[0001]
The present invention relates to a speaker array in which a plurality of speakers are arranged in
a plane, and more particularly to a technique for diagnosing the change in output characteristics
of each speaker and the presence or absence of a failure.
[0002]
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1
A speaker array in which a plurality of speakers are arranged in a plane is installed in an acoustic
space such as a concert hall, a movie theater, or various event venues, and it is widely practiced
to reproduce a realistic sound.
In order to reproduce a realistic sound by using such a speaker array, the signal level and delay
of the sound output from each speaker according to the output characteristic of each speaker
such as the vibration characteristic of the diaphragm included in each speaker Needs to be
properly adjusted. However, even if such adjustments have already been made at the time of
factory shipment of the speaker array, the output characteristics of each speaker may change
due to aging or the like, or a failure such as disconnection may occur. There is a case. For this
reason, it is necessary to perform the above adjustment again, for example, periodically
diagnosing the presence or absence of a change in the output characteristic or failure of each
speaker, but the speaker array is formed of a large number of speakers such as several hundred.
When configured, it takes a lot of labor to diagnose the change in output characteristics of each
speaker and the presence or absence of a failure.
[0003]
On the other hand, with regard to a single speaker, various techniques have been proposed which
make it easy to accurately grasp the output characteristic and perform various adjustments in
accordance with the output characteristic. The techniques disclosed in 1 can be mentioned. In
Patent Document 1, a microphone is disposed in the vicinity of a speaker, and a predetermined
sound is output from the speaker, and the sound is received by the microphone, and an electrical
signal output from the microphone (that is, output from the speaker Disclosed is a technique for
grasping the output characteristics of the speaker by analyzing the electrical signal
corresponding to the voice signal. Unexamined-Japanese-Patent No. 06-233393
[0004]
As described above, with regard to a single speaker, by using the technology disclosed in Patent
Document 1, it becomes easy to grasp the output characteristics thereof and to perform various
adjustments in accordance with the output characteristics. However, the technique disclosed in
Patent Document 1 can not be applied as it is to a speaker array including a plurality of speakers.
This is because, in the speaker array, a plurality of speakers are arranged in close proximity, and
it is impossible to individually receive the sound output from each speaker. That is, even if the
technology disclosed in Patent Document 1 is used, it is not possible to grasp the output
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2
characteristics of each of the speakers constituting the speaker array or to diagnose the presence
or absence of a failure.
[0005]
The present invention has been made in view of the above problems, and in a speaker array
having a plurality of speakers arranged in a plane, it is easy to diagnose the change in output
characteristics of each speaker and the presence or absence of a failure. In addition, it aims at
providing the technology which makes it easy to adjust according to the diagnosis result.
[0006]
In order to solve the above problems, the present invention comprises a diaphragm function, a
speaker function of vibrating the diaphragm according to an input electric signal and outputting
a sound according to the electric signal, and the input sound An audio input / output device array
in which a plurality of unit devices having a plurality of unit devices having a microphone
function simultaneously converting the vibration of the diaphragm into an electric signal and
outputting the electric signal, and the microphone function Storage means in which characteristic
data representing a signal waveform of the electric signal output from the unit device received by
the unit device is written for each unit device, and a sound emitted from the predetermined
sound source is received by the microphone function Analysis means for analyzing the electric
signal output from each of the unit devices that have made a sound and specifying the signal
waveform for each of the unit devices; When there is a unit device whose signal waveform has
not been identified, or the difference between the signal waveform identified by the identification
means and the signal waveform represented by the characteristic data stored in the storage
means exceeds a predetermined threshold. A voice input / output device is provided, which
comprises: notification means for giving notification when there is a unit device.
According to such an audio input / output device, when there is a unit device whose signal
waveform is not specified by the specifying unit, or when the signal waveform specified by the
specifying unit and the characteristic data stored in the storage unit When there is a unit device
whose difference with the signal waveform exceeds a predetermined threshold value, the
notification unit notifies that effect.
[0007]
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In another aspect of the present invention, a speaker function is provided that includes a
diaphragm, vibrates the diaphragm according to an input electric signal, and outputs a sound
according to the electric signal, and the speaker function by the input sound An audio input /
output device array in which a plurality of unit devices having a plurality of unit devices having a
microphone function simultaneously converting the vibration of the diaphragm into an electric
signal and outputting the electric signal is also provided by the microphone function. A storage
means in which characteristic data representing a signal waveform of an electric signal output
from the unit device received is written for each unit device, and a sound emitted from the
predetermined sound source is received by the microphone function Means for analyzing the
electric signal output from each of the unit devices and specifying the signal waveform for each
unit device; For each unit according to the difference between the signal waveform specified by
the specifying unit and the signal waveform represented by the characteristic data stored in the
storage unit, the electricity input to the unit device in which the speaker function is activated. An
audio input / output device is provided, comprising: generation means for generating a
parameter representing signal processing to be applied to a signal. According to such an audio
input / output device, a unit device in which the speaker function is activated according to the
difference between the signal waveform specified by the specifying means and the signal
waveform represented by the characteristic data stored in the storage means. A parameter
representing signal processing to be applied to the electric signal to be input to is generated for
each unit device by the generation means.
[0008]
In a more preferable aspect, the apparatus further comprises designation means for designating
a sound source of the sound received by each unit device, and the storage means stores a
plurality of the characteristic data for each sound source for each of the unit devices. And the
generation unit is configured to generate the parameter according to a difference between the
signal waveform represented by the characteristic data corresponding to the sound source
designated by the designation unit and the signal waveform identified by the identification unit
for each of the unit devices. It is characterized by generating In such an aspect, the parameter
corresponding to the sound source designated by the designation unit is generated by the
generation unit.
[0009]
According to the present invention, with respect to a speaker array having a plurality of speakers
arranged in a plane, it becomes easy to diagnose changes in output characteristics of the
speakers and the presence or absence of a failure, and adjustment according to the diagnosis
result The effect is that it is easy to do.
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[0010]
The best mode for carrying out the present invention will be described below with reference to
the drawings.
(A: Configuration) FIG. 1 is a block diagram showing a configuration example of a voice input /
output device 10 according to an embodiment of the present invention. The audio input / output
device 10 includes, for example, an audio input / output device array 110 functioning as a
speaker array placed in an acoustic space such as a concert hall, and the audio input / output
device array 110 is shown in FIG. Thus, m × n unit devices DU (i, j) (i = 1 to m, j = 1 to n) are
arranged in a plane. In the following, when it is not necessary to distinguish each of the plurality
of unit devices DU (i, j), it is referred to as “unit device DU”. Although this unit device DU is not
shown in detail, it has a diaphragm, and has a speaker function of vibrating the diaphragm
according to the input electric signal and outputting a sound corresponding to the electric signal.
When the diaphragm vibrates in accordance with the sound emitted from the external sound
source, it has a microphone function of converting the vibration into an electric signal and
outputting it. Further, in the present embodiment, a case is described in which m × n unit
devices DU are arranged in a matrix to form a rectangular speaker surface, but for example, a
cylindrical speaker surface is formed. It goes without saying that the arrangement is not limited
to the arrangement shown in FIG. 2 as in the case where each unit device DU is arranged. In the
present embodiment, although the case where the voice input / output device array 110 is a
speaker array placed in a concert hall or the like will be described, it may be a speaker array
placed in a living room of a general house to form a home theater system. Of course.
[0011]
Although detailed illustration is omitted in FIG. 1, in the audio input / output device 10, the first
switch 120, the second switch 130, the amplifier 140, and the AD converter 150 are arranged to
correspond one by one to each of the unit units DU. Is provided. Further, as shown in FIG. 1, in
addition to the audio input / output device array 110, the first switch 120, the second switch
130, the amplifier 140, and the AD converter 150, the audio input / output device 10 controls a
storage unit 160 and control. A unit 170, a signal processing unit 180, and a display unit 190
are included.
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[0012]
The first switch 120 and the second switch 130 enable the unit device DU to function as a
speaker (ie, enable the speaker function) and enable the microphone function (ie, enable the
microphone function). And the connection of each component described above. Specifically,
when enabling the speaker function of the unit device DU, the connection is switched as shown
by a broken line in FIG. 1, and conversely, when enabling the microphone function of the unit
device DU, the diagram is shown. The connection is switched as shown by the solid line of 1.
Although detailed illustration is omitted in FIG. 1, the m × n first switches 120 and the second
switches 130 collectively perform the microphone function and the speaker function for the m ×
n unit devices DU. The connection switching can be performed in conjunction with one another
so that one of them can be validated. In the following, the operation mode in the case of enabling
the speaker function of each unit device DU will be referred to as "voice output mode", and the
operation mode in the case of enabling the microphone function will be referred to as "diagnosis
mode".
[0013]
The amplifier 140 amplifies the electric signal delivered from the signal processing unit 180
through the second switch 130 when the operation mode is set to the voice output mode, and the
corresponding unit through the first switch 120. While delivering to the device DU, when the
operation mode is set to the diagnostic mode, the electric signal delivered from the
corresponding unit device DU via the first switch 120 and the second switch 130 is amplified,
and the corresponding AD is It is delivered to the converter 150. In the present embodiment, the
amplifier 140 amplifies the electrical signal delivered from the signal processing unit 180 to
each unit device DU and the electrical signal delivered from each unit device DU to the AD
converter 150. However, it goes without saying that such amplification is not absolutely
necessary if each electrical signal has sufficient signal strength.
[0014]
The AD converter 150 performs analog-to-digital conversion on the electric signal delivered from
the amplifier 140, and delivers digital data corresponding to the conversion result to the control
unit 170. The storage unit 160 is composed of, for example, an EEPROM (Electronically Erasable
and Programmable Read Only Memory), a hard disk, or the like, and causes the control unit 170
described later to have data for realizing functions specific to the audio input / output device
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according to the present invention. It is for storing.
[0015]
More specifically, as shown in FIG. 3, the storage unit 160 is associated with data uniquely
identifying each unit device DU (in the present embodiment, a speaker number assigned to each
unit device DU). Two types of data, characteristic data and signal processing parameters, are
stored. Here, the characteristic data shown in FIG. 3 is a signal of an electric signal output from
the unit device DU which has received by the microphone function the sound emitted from the
sound source disposed at a predetermined position in a certain acoustic space. It is data
representing a waveform. On the other hand, the signal processing parameters shown in FIG. 3
are signal processing to be applied to the electric signal supplied to each unit device DU when
the sound image is localized at the position of the sound source in the acoustic space (ie, delay
and signal It is data representing level adjustment). In the present embodiment, in the silent room
300 as shown in FIG. 4A, the impulse sound is output from the sound source 310 placed at a
distance L from the voice input / output device array 110. The characteristic data and the signal
processing parameters for the case of localizing the sound image at the position of the sound
source 310 are stored in the storage unit 160 at the time of factory shipment of the voice input /
output device 10.
[0016]
The control unit 170 is, for example, a CPU (Central Processing Unit), and implements functions
specific to the voice input / output device 10 according to the present invention according to
software written in a ROM (Read Only Memory) or the like (not shown). It is for. More
specifically, when the operation mode is set to the voice output mode, the control unit 170 reads
the signal processing parameter written for each unit device DU in the storage unit 160, and the
signal processing parameter is read. A parameter setting process to be set in the signal
processing unit 180 is performed. The signal processing unit 180 is, for example, a DSP (Digital
Signal Processor), and performs signal processing specific to each unit device DU in the input
audio signal (that is, delay or signal level corresponding to each of the above signal processing
parameters). Adjustment) and output to the amplifier 140 corresponding to each unit device DU.
[0017]
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On the other hand, when the operation mode is set to the diagnosis mode, the control unit 170
executes four processes described below. First, for each unit device DU, it is a specific process of
analyzing digital data delivered from the AD converter 150 and specifying a signal waveform of
an electrical signal corresponding to the digital data. Second, when there is a unit device DU
whose signal waveform is not specified in the above specific processing, or in the unit waveform
DU that is the transmission source of the electrical signal and the signal waveform specified in
the above specific processing. When there is a unit device DU whose difference from the signal
waveform represented by the characteristic data stored in the storage unit 160 in
correspondence with each other exceeds a predetermined threshold value, the display unit 190
configured with an LCD, for example, It is the alerting | reporting process which displays the
message which shows that, and alert | reports that. And thirdly, the difference between the signal
waveform specified by the above-mentioned specific processing and the signal waveform
represented by the characteristic data stored in the storage unit 160 in association with the unit
device DU that is the transmission source of the electric signal. Is a parameter generation process
for regenerating the signal processing parameter for the unit device DU. In the present
embodiment, the signal processing parameter generated by the parameter generation processing
is written to the storage unit 160, and the storage content of the storage unit 160 is updated.
[0018]
(B: Operation) Next, among the operations performed by the voice input / output device 10
according to the present embodiment, an operation showing the characteristic of the
characteristic will be described with reference to the drawings. First, an operation performed by
the voice input / output device 10 when the operation mode is set to the diagnosis mode will be
described. In the operation example described below, it is assumed that the characteristic data
and the signal processing parameter specified under the situation are already stored in the
storage unit 160 as shown in FIG. 4A. In the operation example described below, the speaker
surface of the audio input / output device array 110 in an acoustic space 320 (for example, a
concert hall or the like in which the audio input / output device 10 is placed) as shown in FIG.
When the sound source 310 is placed at a distance L from the above and the sound emitted from
the sound source is used to diagnose whether there is a change in the output characteristics of
each unit device DU or a failure such as a disconnection explain.
[0019]
FIG. 5 is a flowchart showing the flow of the operation performed by the voice input / output
device 10 when the operation mode is set to the diagnosis mode. As shown in FIG. 5, each unit
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device DU which has received the sound output from the sound source 310 outputs an electrical
signal corresponding to the sound (step SA1). The electric signal output from each unit device DU
in this manner is amplified by the amplifier 140 and then converted to digital data by the AD
converter 150, and the digital data is input to the control unit 170 (step SA2).
[0020]
First, the control unit 170 analyzes the digital data input in step SA2, and specifies the signal
waveform of the electrical signal corresponding to the digital data (step SA3). Next, the control
unit 170 determines whether there is a unit device DU for which the specification of the signal
waveform can not be performed, for example, the corresponding digital data is not input (step
SA4). Then, if the determination result in step SA4 is "Yes", a message to notify the corresponding
unit device DU (for example, includes the speaker number (i, j) of the unit device DU (i, j)
Message is displayed on the display unit 190 (step SA5) to notify that failure has been detected
for the unit device DU, and the present diagnosis operation is ended. Conversely, when the
determination result in step SA4 is "No", the control unit 170 stores, for each unit device DU, the
signal waveform specified in step SA3 and the unit device DU in association with each other. The
signal waveform represented by the characteristic data stored in 160 is compared, and it is
determined whether there is a unit device DU whose difference exceeds a predetermined
threshold (step SA6).
[0021]
If the determination result in step SA6 is "Yes", control unit 170 indicates that there is a message
indicating that (that is, a message indicating that there is a unit device DU whose output
characteristics have largely changed from the time of factory shipment). Is displayed on the
display unit 190 (step SA7), and for the corresponding unit device DU, the signal waveform
specified in step SA3 and the characteristic data stored in the storage unit 160 in association
with the unit device DU. In accordance with the difference between the two, the signal processing
parameters are regenerated so that the sound image is localized at the position of the sound
source 310, and the generation result is written in the storage unit 160 (step SA8). Conversely, if
the determination result in step SA6 is "No", the control unit 170 ends the operation in the main
diagnostic mode without executing the processing in steps SA7 and SA8. In the present
embodiment, the signal waveform specified in the silent room 300 is compared with the signal
waveform specified in the acoustic space 320 such as a concert hall, and there is a change in the
output characteristics of each unit device DU. If the distance L between the voice input / output
device array 110 and the sound source 310 is made sufficiently small, the above output
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characteristics are ignored ignoring the difference in acoustic characteristics between the silent
room 300 and the acoustic space 320. It goes without saying that it is possible to diagnose
changes in
[0022]
As described above, in the voice input / output device 10 according to the present embodiment,
for each unit device DU, it becomes easy to diagnose the change in output characteristics from
the time of factory shipment and the presence or absence of a failure, and The effect of
facilitating readjustment of the signal processing parameter according to the diagnosis result is
achieved.
[0023]
(C: Modification) Although one embodiment of the present invention has been described above, it
is needless to say that the following modification may be added to the above-described
embodiment.
(1) In the embodiment described above, the sound source 310 is placed at a distance L from the
speaker surface of the audio input / output device array 110, and the impulse sound output from
the sound source 310 is received by each unit device DU. The case of diagnosing the output
characteristics has been described. However, as shown in FIG. 6A, the signal waveform specified
under the situation where the sound source 340 is placed near the side wall of the reverberation
chamber 330 and pink noise etc. are output from the sound source 340, and The sound source
340 is placed near the side wall of the acoustic space 320 as shown in FIG.), And the signal
processing parameters to be set for each unit device DU are generated again by comparison with
the signal waveform specified under the situation. good. In this way, it is possible to easily adjust
the signal processing parameter in accordance with the acoustic characteristic of the acoustic
space in which the voice input / output device 10 is placed. In addition, the combination of
characteristic data and signal processing parameters when impulse sound is used and the
combination of characteristic data and signal processing parameters when pink noise is used is
written in storage unit 160 for each unit device DU. And the like, and sets of characteristic data
and signal processing parameters corresponding to each of a plurality of sound sources are
written in the storage unit 160 for each unit device DU, and designating means for designating
the type of sound source used for diagnosis Of course, the diagnosis may be performed using
characteristic data corresponding to the sound source designated by the designation means, and
only the signal processing parameter corresponding to the sound source may be regenerated.
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[0024]
(2) In the embodiment described above, the case has been described where the signal processing
parameter specified by the control unit 170 is written in the storage unit 160 for each unit
device DU, but, for example, via a communication network such as LAN (Local Area Network)
These signal processing parameters may of course be transmitted to a predetermined destination
(for example, a computer device used by the sound engineer to control the sound effect). Further,
in the above-described embodiment, when a failure is detected for each unit device DU or when a
change in output characteristic is detected, the message indicating that is displayed on the
display unit 190 is described. Of course, it is also possible to output a voice message indicating
that. The point is that any mode may be used as long as it can notify a failure or a change in
output characteristics for each unit device DU.
[0025]
(3) In the above-described embodiment, the hardware module which is each component of the
voice input / output device 10 cooperates according to the flowchart shown in FIG. 5, thereby
providing functions unique to the voice input / output device according to the present invention.
The case of realization was described. However, it goes without saying that the above-described
components may be realized by software modules.
[0026]
It is a block diagram showing composition of speech input-output device 10 concerning the
present invention. It is a figure which shows the relationship between the audio | voice input /
output device array 110, and unit speaker DU. It is a figure which shows an example of the
storage content of the same memory | storage part 160. FIG. It is a figure for demonstrating the
usage example of the audio | voice input / output device 10. FIG. It is a flowchart which shows
the flow of the operation | movement which the said voice input / output device 10 performs in a
diagnostic mode. It is a figure for demonstrating the usage example of the speech input-output
apparatus 10 which concerns on the modification 1. FIG.
Explanation of sign
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[0027]
DESCRIPTION OF SYMBOLS 10 ... Audio | voice input / output device, 110 ... Sound | voice input
/ output device array, DU ... Unit device, 120 ... 1st switch, 130 ... 2nd switch, 140 ... Amplifier,
150 ... AD converter, 160 ... Storage part, 170 ... Control Unit 180 Signal processing unit 190
Display unit.
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