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JP2009088921

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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
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DESCRIPTION JP2009088921
A main housing and a plurality of sub housings rotatable relative to the main housing, and
controlling the sound collecting directivity of the sound emitting and collecting apparatus only
by rotating the plurality of sub housings Provide a sound collection system that can do. A sound
emission and collection system 100 includes a sound emission and collection device 1 and a PC
2. The sound emission and collection device 1 includes a main housing 10 and sub housings 11
and 12 rotatable relative to the main housing 10, and each of the main housing 10 and the sub
housings 11 and 12 A microphone array is formed. When the user inputs a desired usage mode,
the sound emission and collection system 100 determines the set positional relationship between
the main housing 10 and the sub housings 11 and 12 according to the usage mode, and the set
positional relationship and the current discharge status. A wizard display consisting of the
measured positional relationship of the sound device 1 is displayed on the PC 2. Further, the
sound emission and collection system 100 determines the sound collection mode according to
the measured positional relationship and controls the sound collection directivity. That is, the
sound collection mode can be changed only by rotating the sub-housings 11 and 12. [Selected
figure] Figure 8
Sound pickup system
[0001]
The present invention provides a wizard for operating the hinge to adjust the angle of the
microphone array based on the number of speakers and the position of the speaker in an
integrated microphone in which three array microphones are hinged at two points. The present
invention relates to a sound emission and collection system having sound collection directivity
according to the angle of a microphone array.
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1
[0002]
2. Description of the Related Art Conventionally, various kinds of sound collection devices and
sound collection systems have been devised which use a single microphone or a microphone
array including a plurality of microphones to collect speech from a speaker.
(See Patent Document 1).
[0003]
For example, in the microphone device described in Patent Document 1, four nondirectional
microphones are used in a housing, and sound collection according to the application is
performed on the collected sound signal. For example, non-directional sound collection and
sound collection having predetermined directivity can be realized by selecting any of the sound
signals or performing phase processing of a predetermined pattern or the like using a plurality of
sound signals. There is. JP 2003-284179 A
[0004]
In such a conventional sound collection system, the arrangement pattern of the microphones
installed in the housing is fixed, and the number of microphones is not large, so there are few
patterns of sound collection directivity. In addition, since the microphone is installed in the
housing, it was not possible to visually recognize in which direction the sound was collected.
[0005]
Therefore, in order to obtain the sound collection directivity desired by the user, it is possible to
easily change the arrangement pattern of the microphones, and to allow the user to easily view
the set sound collection directivity for the user. The purpose is to provide a sound collection
system with a lot of
[0006]
A sound collection system according to the present invention comprises at least at least a main
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2
case provided with a sound collection means for generating an audio signal from collected
surrounding sound, and a sound collection means for generating an audio signal from collected
surrounding sound. And detecting a plurality of sub-casings installed at different positions of the
main casing and rotatable with respect to the main casing, and a pivoting amount of the subcasing relative to the main casing; Out of a plurality of sound collection modes, based on the
measured positional relationship calculating means for calculating the measured positional
relationship between the main housing and the plurality of sub-housings and the measured
positional relationship calculated by the measured positional relationship calculating means
Based on the sound collection mode determining means for selecting and determining the sound
collection mode to be selected and the sound collection mode determined by the sound collection
mode determining means, the sound collection means of the main case and the collection of the
plurality of sub-housings Control the sound collection directivity of the sound signal collected by
the sound means Characterized in that it comprises a sound collection control means.
[0007]
In this configuration, the sound collection system is composed of a main housing and a plurality
of sub housings rotatable relative to the main housing.
The main housing and the plurality of sub-housings each have a sound collecting means such as
a microphone.
The sound collection system detects the amount of rotation of the plurality of sub-housings with
respect to the main housing, and calculates the measured positional relationship between the
main housing and the plurality of sub-housings from the amount of rotation. The sound
collection system determines a sound collection mode based on the calculated measured
positional relationship, and the sound collection direction of the sound signal collected by the
sound collection means of the main case and the plurality of sub-housings based on the sound
collection mode Control the sex. Thereby, the sound collection system can control the pattern
change of sound collection directivity only by rotating the plurality of sub-housings with respect
to the main housing. That is, in order to obtain sound collection directivity desired by the user, it
is only necessary to rotate the sub-housing of the sound collection system. Therefore, the user
can easily obtain desired sound collection directivity. Further, since the sound collection
directivity is determined according to the measured positional relationship between the main
housing and the plurality of sub housings, the user can intuitively know the sound collection
range of the sound collection system only by visual observation.
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3
[0008]
Further, in the sound collection system according to the present invention, when the sound
collection control unit of the sound collection control unit is arranged in a straight line, the sound
collection unit of the main housing and the sound collection unit of the plurality of sub housings
are arranged in a straight line. Controlling the sound signals collected by each of the plurality of
sound collection means and the plurality of sub-housings as a set of sound collection directivity
components, and the sound collection means of the main housing and the plurality of sub-hoices
When the sound collecting means of the case is not arranged in a straight line, the sound signals
collected by the sound collecting means of the main case and the sound collecting means of the
plurality of sub-housings are collected by each sound collecting means It is characterized by
controlling as a directional component.
[0009]
In this configuration, when the main case and the sub case are arranged in a straight line, the
sound collection system uses one of the audio signals collected by the respective sound collection
means of the main case and the sub case. Control the sound collection directivity so as to realize
the four sound collection directivity.
Further, when the main case and the sub case are not arranged in a straight line, the sound
collection directivity is controlled for each of the sound collecting means of the main case and
the sub case. As a result, when the main case and the sub case are arranged in a straight line, the
sound collection system is compared with the sound collection directivity by the sound collection
means of each case when these are not arranged in a straight line. Since all sound signals picked
up by the sound pickup means of the housing and sub housing are used, the number of sound
signals for forming sound collection directivity increases, and patterns such as delay processing
and addition processing for each sound signal become As the number increases, it is possible to
realize a wide variety of sound collection directivity. In addition, since the number of audio
signals for forming the sound collection directivity is large, the calculation accuracy is improved,
and each sound collection directivity can be realized with high accuracy.
[0010]
Furthermore, the sound collection system according to the present invention further includes
usage mode input reception means for receiving an input of a desired usage mode including a set
position relationship between the main housing and the plurality of sub housings, and the
measured position relationship calculation means When it is detected that the main housing and
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the sub housing have the set positional relationship, the sound collecting mode determining
means selects and determines a sound collecting mode corresponding to the set positional
relationship. I assume.
[0011]
In this configuration, the sound collection system receives an input of a desired usage from the
user.
The sound collection system determines the sound collection mode according to the usage mode
when the main housing and the sub housing of the sound collection system are arranged so as to
match the setting positional relationship of the desired usage mode. Thus, the sound collection
directivity is controlled in the sound collection mode according to the usage mode by matching
the main housing and the sub housing of the sound collection system to the setting positional
relationship of the usage mode desired by the user. Can.
[0012]
In addition, the sound collection system according to the present invention further includes
display control means for generating display data including the set positional relationship and
the measured positional relationship, and display means for displaying the display data. I assume.
[0013]
In this configuration, the sound collection system displays the set positional relationship of the
desired usage mode and the measured positional relationship between the main housing of the
current sound collection system and the plurality of sub housings.
Thereby, the user can easily recognize the difference between the set positional relationship and
the actual measured positional relationship. In addition, the user can rotate the sub-housing of
the sound collection system with reference to the display, so that the main housing and the subhousing of the sound collection system match the set positional relationship. Can be easily
placed. That is, it is possible to easily realize the arrangement of the desired sound collection
directivity while viewing the display.
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5
[0014]
Further, according to the sound pickup system of the present invention, a rotation means for
rotating the sub-housing with respect to the main housing, and a rotation operation input means
for receiving an operation input of rotation of the rotation means. The display control means
regenerates display data when the sub-housing rotates.
[0015]
In this configuration, when the sound collection system rotates the sub-housing with respect to
the main housing, the setting positional relationship of the desired usage mode and the measured
positional relationship of the sound collection system are changed according to the rotation.
Display while updating in order.
Thereby, the user can refer to the difference between the set positional relationship and the
measured positional relationship in real time. That is, it is possible to easily realize the desired
sound collection directivity arrangement while recognizing how close to the desired sound
collection directivity arrangement the user is looking at the display.
[0016]
According to the present invention, the sound collection system is composed of a main housing
and a plurality of sub housings rotatable with respect to the main housing, and only by rotating
the plurality of sub housings, a large number of sound collecting systems are obtained. Sound
directivity pattern switching can be easily controlled. Further, the user can intuitively know the
sound collection range of the sound collection system only by referring to the positional
relationship between the main housing of the sound collection system and the plurality of sub
housings.
[0017]
The sound emission and collection system 100 (corresponding to the sound collection system of
the present invention) according to the embodiment of the present invention. Will be described
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with reference to FIG. The sound emission and collection system 100 includes the sound
emission and collection device 1 and the PC 2, and the sound emission and collection device 1
and the PC 2 are connected by the USB cable 300. The sound emission and collection device 1
includes a main housing 10 and sub housings 11 and 12 rotatable relative to the main housing
10.
[0018]
When a conference is performed using the sound emission and collection system 100, the user
900 selects and determines an appropriate use mode according to the number of people 900902 participating in the conference and the seating position. The usage mode includes the
positional relationship between the main housing 10 and the sub housings 11 and 12, the sound
collection directivity formed by the positional relationship, and the like according to the usage
status of the sound emission and collection system 100. The sound emission and collection
system 100 is configured such that the positional relationship between the main housing 10 and
the sub housings 11 and 12 based on the usage mode determined by the user 900 (hereinafter,
the main housing 10 and the sub chassis set based on the usage mode The positional relationship
between the bodies 11 and 12 is referred to as a set positional relationship. ), And display the
wizard on the display of PC2. The wizard display refers to the setting positional relationship
according to the selected mode of use and the positional relationship between the actual main
housing 10 and the sub housings 11 and 12 (hereinafter referred to as the main housing 10 and
the sub housings 11 and 12). The actual positional relationship is called a measured positional
relationship. And) are displayed. By referring to this wizard display, the user 900 can easily
recognize the difference between the set positional relationship and the actual measured
positional relationship, so the sub-housings 11 and 12 are rotated to set the actual measurement
positional relationship. It can be easily adapted to the positional relationship. As a result, by
referring to the wizard display, the user 900 can easily realize the positional relationship
between the main housing 10 and the sub housings 11 and 12 according to the selected usage
mode.
[0019]
Further, a microphone array is formed in each of the main housing 10 and the sub housings 11
and 12, and the sound collection directivity is controlled for each microphone array based on the
usage mode. Thereby, the sound emission and collection system 100 can form sound collection
directivity according to the usage mode.
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7
[0020]
Furthermore, when the main housing 10 and the sub housings 11 and 12 are arranged in a
straight line, one microphone is directed by all the microphones formed in the main housing 10
and the sub housings 11 and 12 Sound collection directivity can also be controlled to realize the
gender. In this case, as compared to the case of forming an individual microphone array for each
of the main housing 10 and the sub housings 11 and 12 to control the sound collection
directivity, since the sound signals collected by all the microphones are used, Since the number
of audio signals for forming the sound directivity increases and the patterns of delay processing
and addition processing for each audio signal increase, a wide variety of sound collecting
directivity can be realized. In addition, since the number of audio signals for forming the sound
collection directivity is large, the calculation accuracy is improved, and each sound collection
directivity can be realized with high accuracy.
[0021]
Next, the function and configuration of the sound emission and collection system 100 will be
described with reference to FIGS. The sound emission and collection system 100 mainly includes
a sound emission and collection device 1 that performs sound emission, sound collection, and
rotation amount detection, and a PC 2 that mainly uses usage mode selection and usage mode
display and the like. FIG. 2 is a plan view of the sound emission and collection device of the
present embodiment in a basic posture. FIG. 3 is a functional block diagram of a sound emission
and collection system including the sound emission and collection device of the present
embodiment and a PC.
[0022]
As shown in FIG. 2, the sound emission and collection device 1 mechanically includes a main
housing 10 and two sub-housings 11 and 12 rotatably installed with respect to the main housing
10. Be done. In the following description, the number of microphones MIC installed in each of the
main housing 10 and the sub housings 11 and 12 is four, and the number of speakers SP
installed in the main housing 10 is two. The number of microphones MIC and the number of
speakers SP may be set appropriately according to the specifications.
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8
[0023]
The main housing 10 has a substantially triangular shape in a plan view, and has a thickness that
allows the microphone MIC to be installed along the side wall. Hereinafter, the downward
direction in FIG. 2 is referred to as the front direction. The main housing 10 has three side walls,
and on the inside of the front direction side wall (the side wall having a wall surface downward in
FIG. 2), four microphones MIC make the sound collection direction outward from the front
direction side wall is set up. The four microphones MIC are arranged in parallel to the front
direction side wall at a predetermined interval, and the microphone array 1160 having a sound
collection area outside the front direction side wall is configured by the four microphones MIC.
[0024]
On the upper surface (the surface viewed in plan in FIG. 2) of the main housing 10, an operation
unit 115 composed of a plurality of operation elements is installed. The plurality of operators
are, for example, arranged in parallel to the front direction side wall as shown in FIG. Here, the
plurality of operators, for example, will be referred to as a sound collection application
(hereinafter referred to as a sound collection application described later). An operator
(hereinafter, referred to as an operator for sound collection application) that accepts start and
end of , An operator that accepts a preset assignment, an operator that accepts volume
adjustment of an emitted sound, an operator that accepts a microphone mute, and the like.
[0025]
Two speakers SP are installed parallel to the front direction side wall and at an interval at which
dipole speaker control can be performed, in the vicinity of the approximate center of a triangle of
the main housing 10 in plan view. Further, the region other than the operation portion 115 of
the upper surface wall of the main housing 10 and the side wall in the front direction are
meshed.
[0026]
Although not shown, a USB connection terminal, an analog audio IN terminal, an analog audio
OUT terminal, and a power supply are provided as input / output I / F 111 (see FIG. 3) at a
portion corresponding to a diagonal of the front direction side wall of main housing 10. An input
terminal is installed.
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9
[0027]
The portions corresponding to the corners of both ends of the front direction side wall of the
main housing 10 are pivot connection portions 13A and 13B with the sub-housings 11 and 12,
respectively. As the sub-housings 11 and 12 rotate with respect to the main housing 10.
Rotary encoders 1171 and 1172 (refer to FIG. 3) are installed in the rotational connection
portions 13A and 13B, and a detection signal corresponding to the amount of rotation of the sub
case 11 is acquired by the rotary encoder 1171. Then, the detection signal corresponding to the
amount of rotation of the sub case 12 is acquired.
[0028]
The sub casings 11 and 12 have a length in the long side direction substantially the same as one
side of a triangle of the main casing 10, a length in the short side direction of a predetermined
length, and a thickness substantially the same as the main casing 10 It has a rectangular
parallelepiped shape. One end in the long side direction of the sub-housings 11 and 12 is
connected to the main housing 10 at pivot connection portions 13A and 13B. In the sub-housings
11 and 12, the state in which all sides in the long side direction abut the main case 10 is one end
of the rotation range, and the long side direction and the front side wall of the main case 10 are
parallel. In the range which makes the position which becomes a predetermined angle projected
in the front direction further from the front direction side wall of the main case 10 as the other
end of the rotation range.
[0029]
The sub-housing 11 is in contact with one side wall of the main housing 10 (in the case of FIG. 2,
the side wall that is on the upper right side), the outer side opposite to the main housing 10 (in
the case of FIG. The four microphones MIC are installed with the sound pickup direction as the
upper right direction). These microphones MIC are arranged at predetermined intervals along the
long side direction of the sub-housing 11, and a microphone array having a sound collection area
outside the microphone MIC installation side of the sub-housing 11 by these four microphones
MIC 1161 is comprised.
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10
[0030]
The sub-housing 12 is in contact with one side wall of the main housing 10 (in the case of FIG. 2,
the side wall that is on the upper left side), the outer side opposite to the main housing 10 (in
FIG. 2) The four microphones MIC are installed with the sound pickup direction as the upper left
direction). These microphones MIC are arranged at predetermined intervals along the long side
direction of the sub-housing 12, and a microphone array having a sound collection area outside
the side of the microphone MIC installation side of the sub-housing 12 by these four
microphones MIC 1162 is comprised. The sound collection signals of the microphones MIC of
the microphone arrays 1161 and 1162 are supplied to the sound collection control unit 113 (see
FIG. 3) of the main housing 10 via the pivot connection units 13A and 13B.
[0031]
Further, as shown in FIG. 3, the sound emission and collection device 1 functions as a functional
unit in the main housing 10 together with the above-described input / output I / F 111, the
operation unit 115, the microphone arrays 1160 to 1162, and the rotary encoders 1171 and
1172. The control unit 110, the sound emission control unit 112, the sound collection control
unit 113, the echo canceller 114, and the speaker SP are provided.
[0032]
The control unit 110 performs overall control of the sound emission and collection device 1.
The control unit 110 performs control based on a command input by each operation element of
the operation unit 115. For example, when the control unit 110 receives an operation input for
activating the sound collection application, the control unit 110 performs sound collection
application activation control to the PC 2 connected by the USB cable 300 via the input / output I
/ F 111. When the control unit 110 receives an operation input for ending the sound collection
application, the control unit 110 performs the sound collection application end control to the PC
2 connected by the USB cable 300 via the input / output I / F 111. When the control unit 110
receives an operation input of assignment, the control unit 110 controls execution of assignment
to the PC 2. When the control unit 110 receives an operation input for volume adjustment of the
sound emission sound, the control unit 110 instructs the sound emission control unit 112 to
control the sound emission of the volume adjustment. When the control unit 110 receives an
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operation input of the microphone mute, for example, the control unit 110 instructs the sound
collection control unit 113 to stop the output of the output sound collection signal.
[0033]
Further, when the sound collection mode is determined by the CPU 210 of the PC 2 described
later, the control unit 110 gives the sound collection control unit 113 a sound collection
directivity instruction to form sound collection directivity according to the sound collection
mode. The control unit 110 acquires sound emission directivity information from the sound
emission voice signal with sound emission directivity information input by the input / output I /
F 111, and gives the sound emission directivity instruction to the sound emission control unit
112.
[0034]
Furthermore, the control unit 110 detects the amount of rotation based on the detection signals
from the rotary encoders 1171 and 1172, and outputs the amount of rotation to the PC2.
[0035]
The input / output I / F 111 is configured as described above, and is connected to the device I / F
211 of the PC 2 via the USB cable 300 in the present embodiment.
The input / output I / F 111 receives an emitted sound signal and transmits an output sound
collection signal. When the input / output I / F 111 receives the emitted directivity information
as well as the emitted voice signal, the input / output I / F 111 gives the emitted directivity
information to the control unit 110, and outputs the emitted voice signal to the emitted control
unit 112 via the echo canceller 114. give. When transmitting the output sound collection signal,
the input / output I / F 111 acquires the sound collection directivity information from the control
unit 110, associates it with the output sound collection signal, and transmits it. The input /
output I / F 111 transmits and receives various control signals between the control unit 110 and
the PC 2.
[0036]
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The sound emission control unit 112 gives individual discharge to each of the two speakers SP
based on the sound emission voice signal acquired via the PC 2 and the input / output I / F 111
and the sound emission directivity instruction from the control unit 110. Generate a sound drive
signal. Specifically, the sound emission control unit 112 determines the delay relationship
between the individual sound emission drive signals given to the two speakers SP based on the
instructed sound emission directivity instruction. The sound emission control unit 112 performs
delay processing according to the delay relationship on the two divided sound emission sound
signals, and outputs them to the two speakers SP as individual sound emission drive signals. At
this time, the sound emission control unit 112 performs signal level control of the individual
sound emission drive signal according to the sound emission control instruction of volume
adjustment.
[0037]
The two speakers SP are disposed at the previously set intervals as described above, and emit the
sound according to the individual sound emission drive signal. The distance between the two
speakers SP and the individual sound emission drive signal given to each of them are previously
set to function as a dipole speaker, and a plurality of sound emission directivity are realized by
these conditions.
[0038]
The four microphones MIC of the microphone array 1160 installed in the main housing 10 pick
up the sound in the sound collection area with the predetermined area on the outer side of the
front direction wall side of the main housing 10 as the sound collection area To generate a
pickup signal.
[0039]
The four microphones MIC of the microphone array 1161 installed in the sub case 11 have a
predetermined area outside the side where the microphone array 1161 is installed in the sub
case 11 as a sound collecting area, and the four microphones in the sound collecting area Sound
is collected to generate a sound pickup signal.
[0040]
Similarly, the four microphones MICs of the microphone array 1162 installed in the sub case 12
use the sound collection area with the outer predetermined area on the side where the
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microphone array 1162 is installed in the sub case 12 as the sound collection area The voice in
the area is picked up to generate a picked up signal.
[0041]
The sound collection control unit 113 performs delay processing and addition processing based
on the sound collection directivity instruction given from the control unit 110 on the sound
collection signals of the microphones MIC of the microphone arrays 1160 to 1162 to give
instructions. An output sound collection signal collected with the collected sound collection
directivity is generated and output to the echo canceller 114.
The sound collection control unit 113 gives sound collection directivity information to the
control unit 110 when the sound collection direction can be acquired.
At this time, if a plurality of speakers are simultaneously speaking, an output sound collection
signal and sound collection directivity information are individually generated.
[0042]
The echo canceller 114 comprises an adaptive filter and a post processor that includes an adder.
The adaptive filter generates a pseudo-regression sound signal based on the emitted speech
signal to provide the pseudo-regression sound signal to the post processor adder. The adder of
the post processor cancels the echo by subtracting the pseudo-regression sound signal from the
output sound pickup signal, and outputs the result to the input / output I / F 111. At this time,
the post processor feeds back the output result to the adaptive filter.
[0043]
The PC 2 is, for example, a general-purpose personal computer, and includes a CPU 210, an
apparatus I / F 211, a communication I / F 212, a storage unit 213, a RAM 214, an operation
unit 215, and a display unit 216.
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[0044]
The CPU 210 uses the RAM 214 as a temporary storage area and a work area, and executes
various general-purpose processes including network communication and the like based on the
input of the operation unit 215 and the like.
When receiving the sound collection application activation control from the sound emission and
collection device 1, the CPU 210 reads out and executes the sound collection application
program stored in the storage unit 213. The sound collection application includes a wizard
application and a positional relationship detection application. At this time, the CPU 210 selects
usage mode data corresponding to the usage mode input from the operation unit 215 from the
usage mode data stored in the storage unit 213. The CPU 210 acquires the set positional
relationship between the main housing 10 and the sub housings 11 and 12 based on the
positional relationship data stored in the storage unit 213 and corresponding to the selected
usage mode data. The CPU 210 also calculates the measured positional relationship between the
main housing 10 and the sub housings 11 and 12 based on the amount of rotation obtained from
the sound emission and collection device 1. The CPU 210 controls the display unit 216 to display
an image by a sound collection application such as an image displaying a set positional
relationship or an actual measured positional relationship, an image based on general processing,
and the like. Furthermore, the CPU 210 determines the sound collection mode based on the
measured positional relationship between the main housing 10 and the sub housings 11 and 12.
In addition, the detailed execution content by a sound collection application is mentioned later.
[0045]
Further, when the CPU 210 receives execution control of assignment from the sound emission
and collection device 1, the CPU 210 performs a process preset for the assignment.
[0046]
The device I / F 211 is a USB terminal in this embodiment, and is connected to the input / output
I / F 111 of the sound emission and collection device 1 via the USB cable 300 to control
communication between the CPU 210 and the sound emission and collection device 1 Do.
[0047]
The communication I / F 212 is a so-called LAN terminal, and is connected to the network 400
via a network cable.
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[0048]
The storage unit 213 is a so-called hard disk drive HDD or the like, stores a general-purpose
processing program as a PC, and stores a sound collection application, usage mode data,
positional relationship data, and the like.
The usage mode data is data including the number of speakers, the speaker position, the
positional relationship between the main housing 10 and the sub housings 11 and 12, the
adaptive sound collection range, and is referred to when the sound collection application is
executed.
The positional relationship data is data that associates the amount of rotation with the positional
relationship.
[0049]
The operation unit 215 is a so-called keyboard or mouse, and receives an operation input from
the user 900 and gives it to the CPU 210.
For example, when the sound collection application is executed and a plurality of usage modes
are displayed on the display unit 216, an operation input for selecting a desired usage mode is
received and given to the CPU 210.
[0050]
The display unit 216 is a so-called liquid crystal display panel or the like, and displays various
screens based on the control of the CPU 210.
[0051]
Next, the execution flow of the sound collection application, which is a feature of the present
embodiment, will be described with reference to FIGS. 4 to 7.
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FIG. 4 is a flowchart showing an execution flow of the sound collection application. FIG. 5 is a
view showing a usage mode of the sound emission and collection device and the PC. FIG. 6 is a
view showing an example of the wizard display of the usage mode. FIG. 7 is a diagram showing a
wizard display showing the sound emission and collection device in the process of setting. FIG.
7A shows a state of difference between the measured positional relationship and the set
positional relationship. FIG. 7 (B) shows an example of guide display at the time of eliminating
the difference between the measured positional relationship and the set positional relationship.
[0052]
With the sound emission and collection device 1 and the PC 2 already activated and the sound
emission and collection device 1 and PC 2 connected by the USB cable 300, network
communication by the PC 2 is established by the operation of the user 900 (FIG. 5). reference). In
this state, as shown in FIG. 4, when the user 900 operates the sound pickup application operator
of the sound emission and collection device 1 and performs the sound collection application
activation operation, the sound emission and collection device 1 performs this operation. If
accepted (S101: Yes), the sound collection application activation instruction is transmitted to the
PC 2. The sound emission and collection device 1 does not transmit the sound collection
application activation instruction to the PC 2 until the sound collection application activation
operation is received (S101: No). That is, if the sound collection application activation instruction
is not received, the sound emission and collection device 1 simply performs voice communication
with the sound emission and collection system of the multipoint connected from the PC 2 via the
network 400 to collect the sound collection Act as a device that only
[0053]
When receiving the sound collection application activation instruction, the CPU 210 of the PC 2
reads out and executes the sound collection application stored in the storage unit 213 (S102).
[0054]
The CPU 210 executes a wizard application included in the sound collection application to
display a message "Please select a usage mode" or the like on the display unit 216 prompting the
selection of the usage mode.
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Then, the CPU 210 reads out the use mode data stored in the storage unit 213, and displays a
plurality of use modes on the display unit 216. When the user 900 operates the operation unit
215 of the PC 2 to select, for example, the use mode shown in FIG. 6 (S103: Yes), the selected use
mode data is output to the CPU 210. In addition, the process after step S104 is not performed
until it receives input operation of a use aspect (S103: No).
[0055]
The CPU 210 of the PC 2 acquires the set positional relationship between the main housing 10
and the sub housings 11 and 12 according to the selected use mode (S104). The CPU 210
executes the positional relationship detection application included in the sound collection
application in order to acquire the measured positional relationship, and transmits a rotation
amount detection instruction to the sound emission and collection device 1. The sound emission
and collection device 1 starts detection of the rotation amount in response to the rotation
amount detection instruction, and transmits the detected rotation amount to the PC 2 (S105).
[0056]
The CPU 210 reads out the positional relationship data from the sound emission and collection
device 1 and calculates the measured positional relationship between the main housing 10 and
the sub housings 11 and 12 (S106). The calculated measured positional relationship is stored in
the storage unit 213.
[0057]
The CPU 210 detects whether the calculated measured positional relationship and the set
positional relationship are equal (S107). For example, the calculated measured positional
relationship, that is, the angle formed by the main housing 10 of the sound emission and
collection device 1 and each of the sub housings 11 and 12 is equal to the set positional
relationship, that is, the main housing of the selected usage mode. It is determined whether or
not the angle between the body 10 and each of the sub-housings 11 and 12 is within ± 10
degrees.
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[0058]
If the measured positional relationship is equal to the set positional relationship (S107: Yes), the
CPU 210 reads the number of speakers of the usage mode corresponding to the set positional
relationship, the speaker position, and the adaptive sound collection range, for example, as
shown in FIG. Wizard display data as shown is generated and displayed on the display unit 216
(S108). By looking at this wizard display, the user 900 can recognize the number of speakers, the
speaker's seating position and the sound collection range that are optimal for the current state of
the sound emission and collection device 1, and based on this wizard display You can sit down.
And, by sitting on the basis of the wizard display, it is possible to hold the conference in an
optimal sound collection environment.
[0059]
If the measured positional relationship is not equal to the set positional relationship (S107: No),
the CPU 210 reads the number of speakers of the usage mode corresponding to the set
positional relationship and the speaker position, and the sound collection corresponding to the
measured positional relationship. The range is calculated, and wizard display data as shown in
FIG. 7A, for example, is generated and displayed on the display unit 216 (S109). The user 900
can recognize the difference between the current state of the sound emission and collection
device 1 and the state of the usage mode selected by the user 900 by looking at this wizard
display. In addition, since the user 900 can turn the sub-housings 11 and 12 while looking at the
wizard display, it is possible to facilitate the current state of the sound emission and collection
device 1 to the selected use state. it can.
[0060]
At this time, as shown in FIG. 7B, for example, the CPU 210 simultaneously displays the amount
of rotation and the direction of rotation for causing the detected actual measured positional
relationship to coincide with the set positional relationship. Thus, the sub-housings 11 and 12
can be pivoted to the state of the selected mode of use more easily. Furthermore, by reflecting
the rotation on the wizard display, that is, gradually changing the display of the measured
positional relationship in conjunction with the rotation, the user 900 can easily understand and
present the operation to the selected usage mode. it can. Then, after the additional rotation
operation, by sitting down according to the wizard display, the conference can be performed in
an optimal sound collection environment.
04-05-2019
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[0061]
Until the sound emission and collection device 1 receives the sound collection application end
operation (S110: No), the sound emission and collection device 1 transmits the detected amount
of rotation to the PC 2 (S111). The sound emission and collection device 1 transmits the amount
of rotation to the PC 2 each time a detection signal is received from the rotary encoders 1171
and 1172 after the start of detection of the amount of rotation.
[0062]
When the CPU 210 acquires the amount of rotation, that is, detects the rotation of the subhousing 11 and the sub-housing 12 with respect to the main housing 10 (S112: Yes), the process
returns to step S106. On the other hand, if the amount of rotation is not acquired, the process
waits until newly acquiring the amount of rotation (S112: No → S111). Therefore, while the
sound collection application is being executed, if the user 900 rotates the sub-housings 11 and
12, the measured positional relationship is recalculated by this rotation, and the wizard conforms
to the content of the recalculation. Display is done.
[0063]
On the other hand, when the user 900 operates the sound pickup application operator of the
sound emission and collection device 1 and the sound emission and collection device 1 receives
the sound collection application end operation (S110: Yes), the CPU 210 determines the
measured positional relationship. To determine the sound pickup mode (S113). At this time,
when the measured positional relationship and the set positional relationship match, the CPU
210 determines the sound collection mode of the usage mode corresponding to the set positional
relationship. Then, the CPU 210 performs an end process of the sound collection application and
erases the above-mentioned wizard display (S114).
[0064]
Next, the relationship between the use mode and the sound collection mode, that is, the use mode
04-05-2019
20
and the sound collection directivity will be described with reference to FIGS. FIG. 8 is a view
showing a use mode of the sound emission and collection device. FIG. 8A shows the all round
mode. FIG. 8B shows the super wide mode. FIG. 8C shows the narrow range mode. FIG. 8D shows
the wide mode. FIG. 8E shows the straight mode. FIG. 9 is a view showing the sound collection
directivity of the microphone array provided in each of the main case and the sub case. FIG. 9A
shows that the sound collection directivity is narrow range directivity. FIG. 9B shows that the
sound collection directivity is in the middle range directivity. FIG. 9C shows that the sound
collection directivity is a wide range directivity. FIG. 10 is a view showing various sound
collection directivity realized in the straight mode shown in FIG. FIG. 10A shows that the sound
collection directivity is a wide range directivity. FIG. 10 (B) shows that the sound collection
directivity is narrow range directivity. FIG. 10C shows that the sound collection directivity is the
right directivity. FIG. 10 (D) shows the left directivity of sound collection. FIG. 10E shows the
right and left directivity of sound collection. In FIGS. 8 to 10, the sound collection range is a
lightly painted portion.
[0065]
As shown in FIG. 8, the mode of use includes the full circumference mode (FIG. 8 (A)), the super
wide mode (FIG. 8 (B)), the narrow range mode (FIG. 8 (C)), and the wide mode (FIG. D)) and
straight mode (FIG. 8 (E)) It consists of five modes.
[0066]
In the all-around mode shown in FIG. 8A, the sub-housings 11 and 12 are placed in contact with
two sides except the sides in the front direction of the triangle of the main housing 10 (the
direction in which the microphone array 1160 is disposed). Do.
Thereby, the microphone arrays 1160 to 1162 are arranged around the entire circumference of
the main housing 10. In this mode of use, by setting the sound collection directivity of each of
the microphone arrays 1160 to 1162 to a wide range directivity (FIG. 9C), sound can be collected
from the entire periphery of the sound emission and collection device 1 . Therefore, it is suitable
for use in a meeting in which a participant sits around the sound emission and collection device
1.
[0067]
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21
In the super wide mode shown in FIG. 8B, the sub-housings 11 and 12 are at a position close to
the side of the main case 10 in contact with the main case 10 and with respect to the side of the
main case 10 in the front direction. The sub-housings 11 and 12 are disposed such that the sides
in the long side direction of the sub-housings 11 and 12 are orthogonal to each other. As a result,
the microphone arrays 1160 to 1162 are disposed on three sides of the front case side wall of
the main housing 10 and a rectangular shape having the sub housings 11 and 12 as four-sided
elements. In this usage mode, by setting the sound collection directivity of each of the
microphone arrays 1160 to 1162 to a wide range directivity (FIG. 9C), a specific direction (one
side of the four sides in which the microphone arrays 1160 to 1162 are not arranged Sound can
be collected from around the main case except for the direction. For this reason, a monitor or the
like is disposed at the tip of the conference desk in the longitudinal direction, and the sound
emission and collection device 1 is disposed as a specific direction that does not pick up the
monitor direction, so that participants sit in directions other than the monitor direction. Suitable
for conferences.
[0068]
In the narrow range mode shown in FIG. 8C, the sub-housings 11 and 12 are arranged further
outward in the front direction than the side wall of the main case 10 in the front direction. Thus,
the microphone arrays 1160 to 1162 are disposed on the front direction side of the main
housing 10 so as to surround the specific area. In this usage mode, by setting the sound
collection directivity of each of the microphone arrays 1160 to 1162 to the narrow range
directivity (FIG. 9A), the microphone array is surrounded by the main housing 10 and the sub
housings 11 and 12 Sound can be collected from a narrow range. At this time, since noise and
the like are not collected from outside the narrow range surrounded by the main housing 10 and
the sub housings 11 and 12, it is suitable for the participant to use for one conference.
[0069]
In the wide mode shown in FIG. 8D, the side walls of the main housing 10 in the front direction
are at positions where the sub housings 11 and 12 are rotated by a predetermined angle toward
the side of the main housing 10 that abuts on the main housing 10. Arrange sub housings 11 and
12. Thereby, the microphone arrays 1160 to 1162 are arranged in a shape that spreads in a
substantially arc shape on the front direction side of the main housing 10. In this usage mode, by
setting the sound collection directivity of each of the microphone arrays 1160 to 1162 to a wide
directivity (FIG. 9C), a wide range can be obtained with respect to the direction along the front
direction side wall of the main housing 10 Can be picked up. Further, since the sound is not
04-05-2019
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collected from the area opposite to the main housing 10 in the front direction, it is suitable for
use in a conference where participants are seated in a wide area on the front direction side of the
main housing 10.
[0070]
In the straight mode shown in FIG. 8E, the side wall in the front direction of the main housing 10
and the long side direction of the sub housings 11 and 12 are arranged in parallel. Thus, the
microphone arrays 1160 to 1162 are disposed on a straight line on the front direction side of
the main housing 10. By setting the sound collection directivity of each of the microphone arrays
1160 to 1162 to the middle range directivity (FIG. 9B) in this usage mode, sound can be
collected from the front direction side of the main housing 10 it can. Therefore, since the sound
is not collected from the area opposite to the main housing 10 in the front direction, it is suitable
for use in a meeting in which the participant is seated on the front side. In such a straight mode,
sound collection directivity as shown in FIGS. 10A to 10E can be formed by performing sound
collection control processing to be described later.
[0071]
As described above, the sound emission and collection system 100 determines the sound
collection mode according to the measured positional relationship between the main housing 10
and the sub housings 11 and 12 of the sound emission and collection device 1. Thus, the user
can obtain a desired sound collection mode, that is, sound collection directivity, simply by
rotating the sub-housings 11 and 12. Also, since the sound collection mode is determined
according to the measured positional relationship between the main housing 10 and the sub
housings 11 and 12, the user intuitively knows the sound collection range of the sound emission
and collection device 1 only by visual observation. be able to.
[0072]
At this time, the sound emission and collection system 100 can change the sound collection
directivity of each of the microphone arrays 1160 to 1162 according to the sound collection
mode. That is, according to the setting positional relationship of the sound emission and
collection device 1, more suitable sound collection directivity can be obtained.
04-05-2019
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[0073]
Next, the sound collection control processing in the straight mode shown in FIG. 8 (E) described
above will be described. As described above, generally, the sound emission and collection device
1 controls the sound collection directivity as a sound collection directivity component element
for each of the microphone arrays 1160 to 1162 as the sound signal collected by the
microphones MIC. However, only in the case of the straight mode, the sound emission and
collection device 1 performs control so as to realize one sound collection directivity by using all
of the audio signals collected by the respective microphones MIC. As a result, since the sound
emission and collection device 1 set in the straight mode uses the sound signal collected by all
the microphones MIC as compared with the case where the sound collection mode is set in
another mode, sound collection directivity is formed. The number of audio signals to be
processed is increased, and the patterns of delay processing and addition processing for each
audio signal are increased, so that a wide variety of sound collection directivity can be realized. In
addition, since the number of audio signals for forming the sound collection directivity is large,
the calculation accuracy is improved, and each sound collection directivity can be realized with
high accuracy.
[0074]
Specifically, as shown in FIG. 10A to FIG. 10E, various sound collecting directivity can be formed.
For example, as shown in FIG. 10A, sound collection directivity for collecting sound from a wide
range is formed. As shown in FIG. 10 (B), the sound collection directivity for collecting sound
from a narrow range is formed. As shown in FIG. 10 (C), sound collection directivity for collecting
sound only from the right direction is formed. As shown in FIG. 10 (D), sound collection
directivity is formed to collect sound only from the left direction. As shown in FIG. 10 (E), sound
collecting directivity is formed to collect sound only from the left and right directions excluding
the center direction.
[0075]
In the embodiment described above, a general-purpose PC is used to display the wizard, select
the use mode, and make a determination, but a dedicated remote controller may be used for the
sound emission and collection device 1. In this case, only the wizard display function and the
operation input function attached to the display function are given to the remote control, and the
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processing and storage unit related to the execution of the sound collection application including
the selection of usage mode and the communication function Make it happen to 1.
[0076]
Further, in the above embodiment, the amount of rotation is detected using the rotary encoders
1171 and 1172, but the test sound is emitted from the speaker SP and the amount of test sound
is collected by the microphone MIC to detect the amount of rotation. It is also good. In this case,
the sound emission and collection device 1 forms a plurality of sound collection beam signals by
performing delay control with different patterns on the sound collection signals of the
microphones MIC of the microphone arrays 1160 to 1162, respectively. The sound emission and
collection device 1 stores the level distribution of a plurality of collected sound beam signals for
each amount of rotation of the sub-housings 11, 12, ie, the positional relationship between the
main housing 10 and the sub-housings 11, 12. The sound emission and collection device 1
detects the amount of rotation by calculating the level distribution of the plurality of acquired
sound collection beam signals and comparing the level distribution with the stored level
distribution. By detecting the amount of rotation with such a sound emitting and collecting
function, it is possible to detect the amount of rotation without attaching a component that is not
directly related to the sound emitting and collecting function such as the rotary encoders 1171
and 1172. Thereby, the component structure of the sound emission and collection device 1 can
be simplified.
[0077]
Furthermore, although the example in which the sub-housings 11 and 12 are manually rotated
has been described above, the sub-housings 11 and 12 may be automatically rotated by
combining a motor and a gear. In this case, if the PC 2 and the remote control are provided with
operation input means for rotating, the user 900 can more easily perform the rotating operation
while looking at the wizard display. Furthermore, the sound emission and collection device 1 may
be automatically rotated so as to be in the selected use mode.
[0078]
In addition, in the present embodiment, the sound emission and collection system 100 having
sound emission and sound collection functions has been described as an example, but it may be a
sound collection system having only the sound collection function.
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[0079]
It is explanatory drawing of the sound emission system of this embodiment.
It is a top view in the basic posture of the sound emission and collection device of this
embodiment. It is a functional block diagram of the sound emission and collection system which
consists of the sound emission and collection apparatus of this embodiment, and PC. It is a
flowchart which shows the execution flow of a sound-collection application. It is a figure which
shows the usage condition of a sound emission and collection apparatus and PC. It is a wizard
display of a use aspect. It is a figure which shows the wizard display which shows the sound
emission and collection apparatus in the middle of a setting. It is a figure which shows the use
aspect of the sound emission and collection apparatus. It is a figure which shows the sound
collection directivity of the microphone array with which a main case and a sub case are
equipped, respectively. It is a figure which shows the sound collection directivity at the time of
straight mode.
Explanation of sign
[0080]
1-sound emission and collection device, 2-PC, 10-main housing, 11, 12-sub housing, 13A, 13Brotation connection part, 100-sound emission and collection system, 110-control part, 111-input
/ output I / F, 112-sound emission control unit, 113-sound collection control unit, 114-echo
canceler, 115-operation unit, 210-CPU, 211-device I / F, 212-communication I / F, 213-storage
unit , 214-RAM, 215-operation unit, 216-display unit, 300-USB cable, 400-network, 900-902user, 1160-1162-microphone array, 1171, 1172-rotary encoder, MIC-microphone, SP- Speaker
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