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JP2011176536

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2011176536
A sound pickup characteristic of a communication apparatus on the other side is controlled so
that the user can easily listen to the sound. A communication device D communicates with a
partner communication device D that transmits instruction information Z in accordance with a
user's operation. The signal processing unit 52 generates an acoustic signal V collected with
variable directivity characteristics. The receiving unit 22 receives the instruction information Z
from the other communication device D. The control unit 56 controls the directivity
characteristic of the acoustic signal V according to the instruction information Z received by the
receiving unit 22. The transmission unit 24 transmits the acoustic signal V generated by the
signal processing unit 52 to the other communication device D. [Selected figure] Figure 2
Communication device
[0001]
The present invention relates to a communication device that transmits and receives acoustic
signals.
[0002]
There has been conventionally proposed a technique for variably controlling sound collection
characteristics at the time of voice communication using a communication device.
For example, Patent Document 1 discloses a technique for setting the pointing direction and the
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sound collection sensitivity of a sound collection device installed in a communication device
(mobile phone) for each communication partner.
[0003]
JP, 2008-167323, A
[0004]
However, in the technology of Patent Document 1, since the sound collection characteristic for
each communication partner is set according to the operation of the communication apparatus
by the user, the sound collection characteristic is not necessarily adjusted to be easy for the
communication partner to listen to For example, depending on the state of sound collection in
the communication device (for example, the arrival direction and the arrival distance of the vocal
sound), there is also a possibility that the sound collection characteristic may be difficult for the
other party to listen to.
It is possible to verbally request the other party to be a sound collection characteristic that
makes it easy to listen to itself, but in reality it is difficult to request its own request from the
other party (for example, the other party is in a superior position In some cases. In consideration
of the above circumstances, the present invention has an object to control the sound pickup
characteristic of the other party so that the user can easily listen.
[0005]
In order to solve the above problems, a communication device according to the present invention
is a communication device that communicates with a partner communication device that
transmits instruction information according to a user's operation, and is collected with a variable
directivity characteristic. Sound collecting means for generating an acoustic signal, receiving
means for receiving instruction information from the other party communication apparatus,
control means for controlling the directivity characteristic of the sound collecting means
according to the instruction information received by the receiving means, and sound collecting
means And transmitting means for transmitting the generated acoustic signal to the other
communication device. In the above configuration, since the directivity characteristic of the
sound collection means is controlled according to the instruction information transmitted from
the other party communication device, the user of the other party communication device can
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easily listen to the communication device. There is an advantage that the sound collection
characteristic can be adjusted.
[0006]
In a preferred aspect of the present invention, the control means averages a plurality of pieces of
indication information received by the receiving means, and controls the directivity characteristic
of the sound collection means according to the averaged indication information. In the above
aspect, since the instruction information obtained by averaging the plurality of instruction
information is applied to the control of the sound collection characteristic, there is a high
possibility that the user of the other party communication device is adjusted to the sound
collection characteristic easy to hear. Therefore, it is possible to reduce the burden of the user of
the other party communication device in adjusting the sound collection characteristic of the
communication device. In addition, the specific example of the above aspect is later mentioned as
2nd Embodiment, for example.
[0007]
A communication apparatus according to a preferred aspect of the present invention includes
storage means for storing instruction information received by the reception means for each other
communication device, and the control means stores the communication information when
communicating with the other communication device. The directivity characteristic of the sound
collection means is controlled according to the instruction information corresponding to the
other party communication device among the plurality of directivity characteristics to be stored.
In the above aspect, since the directivity characteristic of the sound collection means is
controlled according to the instruction information received in the past from the other party
communication device when communicating with the other party communication device, the user
of each other party communication device It is likely to be adjusted to a sound collection
characteristic that is easy to listen to. Therefore, it is possible to reduce the burden of the user of
each counterpart communication device in adjusting the sound collection characteristics of the
communication device. In addition, the specific example of the above aspect is later mentioned as
3rd Embodiment, for example.
[0008]
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A communication apparatus according to a preferred aspect of the present invention includes
storage means for storing a plurality of different directional characteristics, and the control
means is one of a plurality of directional characteristics stored by the storage means. Control is
made to the directivity characteristic selected according to the instruction information. In the
above aspect, since the directional characteristics according to the instruction information are
selected from the plurality of directional characteristics stored in the storage device, it is
sufficient for the user of the other party's communication device to indicate any of the plurality
of directional characteristics. . Therefore, it is possible to reduce the burden on the user of the
other party communication apparatus. In addition, the specific example of the above aspect is
later mentioned as 4th Embodiment, for example.
[0009]
A communication apparatus according to a preferred aspect of the present invention includes
notification means for notifying a user of execution of control of directivity characteristics
according to instruction information received by the reception means. In the above aspect, since
the user of the communication apparatus is notified of execution of control of the directivity
characteristic according to the instruction information received from the other party
communication apparatus, for example, the communication apparatus's own communication
apparatus is directed It is possible to reduce the possibility that the characteristic is adjusted by
the user of the other communication device. In addition, the specific example of the above aspect
is later mentioned as 5th Embodiment, for example.
[0010]
It is a block diagram of the communication system concerning a 1st embodiment. It is a block
diagram of a communication apparatus. It is a block diagram of a signal processing part. It is a
schematic diagram of the memory | storage device in 2nd Embodiment. It is a schematic diagram
of the memory | storage device in 3rd Embodiment. It is a schematic diagram of the memory |
storage device in 4th Embodiment. It is a block diagram of the communication apparatus in 5th
Embodiment.
[0011]
<A: First Embodiment> FIG. 1 is a block diagram of a communication system using a
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communication apparatus according to a first embodiment of the present invention. As shown in
FIG. 1, the communication system 100 is configured to include a communication network 200
and a plurality of communication devices D (D1, D2). Each of the plurality of communication
devices D is a mobile phone that performs a voice call with another communication device D via
the communication network 200. The communication network (mobile communication network)
200 is composed of a large number of relay devices including a base station and a switching
center. Only two communication devices D (D1, D2) communicating with each other are
illustrated for convenience in FIG. Among the plurality of communication devices D, one
communication device D to be focused on in the description is hereinafter referred to as “own
device” for convenience, and another communication device D to be a communication
counterpart of the own device is referred to as “other party It may be written as
"communication device".
[0012]
FIG. 2 is a block diagram of the communication device D. Although only one communication
device D is shown representatively in FIG. 2, the configuration of each communication device D
in the communication system 100 is the same. As shown in FIG. 2, the communication device D
includes an arithmetic processing unit 12, a storage device 14, a communication device 20, an
input device 32, a sound emitting device 34, and a sound collecting device 40. Arithmetic
processing unit 12 executes a program stored in storage unit 14 to control a plurality of
functions (signal processing unit 52, instruction generation unit 54, control unit 56) for
controlling each element of communication device D. To realize. A configuration in which each
function of the arithmetic processing unit 12 is distributed to a plurality of integrated circuits or
a configuration in which a dedicated electronic circuit (DSP) realizes each function may be
adopted. The storage unit 14 stores programs executed by the processing unit 12 and various
data used by the processing unit 12. A known recording medium such as a semiconductor
recording medium is arbitrarily adopted as the storage device 14.
[0013]
The communication device 20 communicates with the other communication device D using the
communication network 200. For example, a known wireless communication device (antenna
and modulation / demodulation circuit) that exchanges wireless signals with the communication
network 200 can be used as the communication device 20. As shown in FIG. 2, the
communication device 20 includes a receiver 22 and a transmitter 24. The receiving unit 22
receives, from the communication network 200, the signal transmitted by the other
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communication device D. The transmitter 24 transmits to the communication network 200 a
signal whose destination is the communication device D on the other side. For example, the
receiving unit 22 receives and demodulates the acoustic signal V indicating the voice of the user
of the other party communication device D (the communication partner), and the transmitting
unit 24 is an acoustic signal indicating the voice of the user of the own device. Modulate and
transmit V.
[0014]
The input device 32 is a device for the user to input an instruction to the communication device
D, and includes, for example, a plurality of operators (not shown) operated by the user. The
sound emitting device 34 (for example, a speaker or a headphone) emits a sound wave (that is,
the voice of the other party in the call) according to the sound signal V received by the receiving
unit 22.
[0015]
The sound pickup device 40 picks up the user's voice. The sound collection device 40 of the first
embodiment is configured to include a plurality of sound collection bodies 42 (microphone
arrays) which are linearly or planarly arranged apart from each other. Each of the plurality of
sound pickup bodies 42 is a nondirectional microphone that picks up surrounding sound to
generate the sound signal XA. The plurality of acoustic signals XA generated by the plurality of
sound collecting bodies 42 are supplied to the arithmetic processing unit 12 (signal processing
unit 52). Note that illustration of an A / D converter for converting each acoustic signal XA from
analog to digital is omitted for convenience.
[0016]
The signal processing unit 52 realized by the arithmetic processing unit 12 generates an acoustic
signal V in the case where the user's vocal sound is picked up with a specific sound collection
characteristic from the plurality of acoustic signals XA. The sound collection characteristic of the
sound signal V is variably controlled. That is, the sound collection device 40 and the signal
processing unit 52 function as an element (sound collection means) that generates the acoustic
signal V collected with a variable sound collection characteristic (in particular, the directivity
characteristic). As shown in FIG. 3, the signal processing unit 52 of the first embodiment includes
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a directivity processing unit 62 and a sensitivity adjustment unit 64. A configuration in which the
directional processing unit 62 and the sensitivity adjustment unit 64 are reversed may be
employed.
[0017]
The directivity processing unit 62 variably controls the directivity direction of the sound
collection of the acoustic signal V. Specifically, the directivity processing unit 62 generates, from
the plurality of acoustic signals XA, an acoustic signal VX obtained by emphasizing (separating) a
component arriving from a specific directivity direction with respect to the sound collection
device 40 with respect to a component in the other direction. Do. Specifically, the directivity
processing unit 62 generates an acoustic signal VX by forming a sound collection beam (a region
with high sound collection sensitivity) using a direction vector (steering vector) corresponding to
the direction of directivity. . For example, a delay-and-add type beam forming process of forming
a beam in the pointing direction by adding each acoustic signal XA after adding a delay
according to the pointing direction can be suitably adopted for generation of the sound signal
VX. On the other hand, the sensitivity adjustment unit 64 variably controls the sound collection
sensitivity of the acoustic signal V. Specifically, the sensitivity adjustment unit 64 generates the
acoustic signal V by amplifying the acoustic signal VX generated by the directivity processing
unit 62 with a variable gain according to the sound collection sensitivity (instruction sensitivity
σz described later).
[0018]
The instruction generation unit 54 of FIG. 2 variably generates instruction information Z for
instructing the sound collection characteristics (directed direction, sound collection sensitivity) at
the other party communication device D in accordance with the operation of the input device 32
by the user. Do. Specifically, the indication information Z is configured to include an indication
value of the pointing direction (hereinafter referred to as “pointing direction”) θz and an
indication value of sound collection sensitivity (hereinafter referred to as “pointing
sensitivity”) σz. The instruction information Z generated by the instruction generation unit 54
is transmitted from the transmission unit 24 of the communication device 20 to the other
communication device D. On the other hand, the receiving unit 22 receives, from the
communication network 200, the instruction information Z (that is, the sound collecting direction
and the sound collecting sensitivity instructed by the calling party) transmitted by the
transmitting unit 24 of the partner communication device D. A control channel multiplexed with
a speech channel for transmission of the acoustic signal V is used for transmission of the
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instruction information Z. The transmission of the instruction information Z is performed at any
time during operation of the input device 32 at any time during establishment of a call channel
(ie, during a call).
[0019]
The control unit 56 receives instruction information Z (instruction direction θz, instruction)
received by the receiving unit 22 from the other party communication device D from the sound
collection characteristics (directing direction, sound collection sensitivity) of the sound signal V
generated by the signal processing unit 52. It is variably controlled according to the sensitivity
σz). Specifically, the control unit 56 instructs the directivity processing unit 62 a direction
vector corresponding to the instruction direction θz and instructs the sensitivity adjustment unit
64 on the instruction sensitivity σz. Therefore, the pointing direction of the sound signal V
generated by the signal processing unit 52 is updated to the pointing direction θz, and the
sound collection sensitivity of the sound signal V is updated to the pointing sensitivity σz. The
control of the sound collection characteristic by the control unit 56 is executed as needed each
time the receiving unit 22 receives the instruction information Z. In addition, for generation of
the direction vector by the control unit 56, known techniques of sound source separation (for
example, independent component analysis and adaptive beam formation) are arbitrarily adopted.
[0020]
Next, a specific example of the operation of the present embodiment will be described on the
assumption that the user U1 of the communication device D1 and the user U2 of the
communication device D2 talk with each other as shown in FIG. The user U2 of the
communication device D2 who feels during a call that the user U1's voice reproduced from the
sound emitting device 34 is difficult to hear is instructed by appropriately operating the input
device 32 of its own communication device D2 Designate the direction θz and the indication
sensitivity σz.
[0021]
In the communication device D2, the instruction information Z including the instruction direction
θz and the instruction sensitivity σz instructed by the user U2 is generated by the instruction
generation unit 54 and transmitted from the transmission unit 24 to the communication network
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200. On the other hand, in the communication device D1, the receiving unit 22 receives from the
communication network 200 the instruction information Z transmitted from the communication
device D2, and the sound of the sound collection characteristics (directing direction, sound
collection sensitivity) instructed by the instruction information Z The control unit 56 controls the
signal processing unit 52 so that the signal V is generated. The acoustic signal V of the sound
collection characteristic after the update according to the instruction information Z is generated
by the signal processing unit 52 and transmitted from the transmission unit 24 of the
communication device D1 to the communication network 200.
[0022]
The acoustic signal V transmitted from the communication device D1 to the communication
network 200 is received by the receiver 22 of the communication device D2 and then
reproduced from the sound emitting device 34. The user U2 operates the input device 32
appropriately while confirming the reproduction sound from the sound emission device 34 (the
voice of the user U1), so that the communication device D1 has a characteristic that the user U2
can easily listen to it. It is possible to adjust in real time the sound pickup characteristics of
Although the case where the user U2 instructs the sound collection characteristic of the
communication device D1 has been described above, the control of the sound collection
characteristic of the communication device D2 according to the instruction of the user U1 is also
executed in the same procedure. .
[0023]
As described above, in the present embodiment, since the sound collection characteristics
(directing direction, sound collection sensitivity) of the partner communication device D are
controlled according to the operation given to the input device 32 by the user, There is an
advantage that the user of the communication device D can adjust the sound collection
characteristic of the other party communication device D so that the user can easily listen to the
user without verbally requesting the other party.
[0024]
Second Embodiment Next, a second embodiment of the present invention will be described.
In addition, about the element which an effect | action or a function is equivalent to 1st
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Embodiment in each following example, the same code | symbol as the above is diverted and
detailed description of each is abbreviate | omitted suitably.
[0025]
FIG. 4 is a schematic view of the storage device 14 of each communication device D according to
the second embodiment. As illustrated in FIG. 4, the control unit 56 of the communication device
D according to the second embodiment stores, in the storage device 14, a plurality of pieces of
instruction information Z (history of instructions from the other party) received by the receiving
unit 22 in the past. . The instruction information Z is stored in the storage device 14 for each
communication with the other communication device D. If the plurality of pieces of instruction
information Z are received during one communication with the partner communication device D,
the control unit 56 determines that the last instruction information Z of the plurality of pieces of
instruction information Z (that is, the user is easy to hear The instruction information Z)
indicating the finally determined sound collection characteristic is stored in the storage unit 14.
[0026]
The control unit 56 generates the instruction information Zave by averaging the plurality of
instruction information Z stored in the storage device 14, and stores the instruction information
Zave in the storage device 14. The instruction information Zave includes an instruction direction
θave obtained by averaging the instruction directions θz of the instruction information Z stored
in the storage device 14 and an instruction sensitivity σave obtained by averaging the
instruction sensitivities σz of the instruction information Z. Although the time when the control
unit 56 calculates the instruction information Zave is arbitrary, for example, the configuration
that calculates the instruction information Zave when the instruction information Z is added to
the storage device 14 or when the user operates the input device 32 Can be adopted.
[0027]
When starting communication with the other party communication device D, the control unit 56
instructs the storage device 14 to store the sound collection characteristics (directing direction,
sound collection sensitivity) of the sound signal V generated by the signal processing unit 52. It
is variably controlled in accordance with the information Zave (instruction direction θave,
instruction sensitivity σave). That is, the sound collection characteristic of the acoustic signal V
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is initialized. During the subsequent call, the sound collection characteristic of the acoustic signal
V may be adjusted as needed according to the instruction information Z received from the other
party communication device D, as in the first embodiment.
[0028]
As described above, in the present embodiment, since the instruction information Zave obtained
by averaging the plurality of pieces of instruction information Z received by the communication
device D in the past is applied to the processing of the signal processing unit 52, the instruction
information Zave is used. The sound collection characteristic after the control is likely to be a
characteristic that the other party can easily hear. Therefore, there is an advantage that the
burden on the user of each communication device D to adjust the sound collection characteristic
of the other party communication device D is reduced.
[0029]
Third Embodiment FIG. 5 is a schematic view of the storage device 14 of each communication
device D according to a third embodiment. As shown in FIG. 5, the storage device 14 of the
communication device D of the third embodiment stores the instruction information Z (Za, Zb,...)
For each other communication device D (for each call partner) communicated in the past. Do. For
example, the instruction information Z lastly received from the other communication device D
during the previous call is stored in the storage device 14 as the instruction information Z of the
other communication device D. Further, as in the second embodiment, the storage device 14 uses
the average value (Zave) of a plurality of pieces of instruction information Z received in the past
from one other communication device D as the instruction information Z of the other
communication device D. A configuration to store may also be employed.
[0030]
At the start of communication with the other party communication device D, the control unit 56
selects the instruction information Z corresponding to the other party communication device D
among the plurality of pieces of instruction information Z stored in the storage device 14 for
each communication device D. The signal processing unit 52 (pickup characteristic of the
acoustic signal V) is controlled in accordance with the instruction information Z. That is, the
sound collection characteristic of the acoustic signal V transmitted to the other party
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communication device D is initialized according to the instruction information Z received in the
past from the other party communication device D. During the subsequent call, the sound
collection characteristic of the acoustic signal V may be adjusted as needed according to the
instruction information Z received from the other party communication device D, as in the first
embodiment. When the instruction information Z is not generated for the partner communication
device D (that is, when communicating with the partner communication device D for the first
time), a predetermined initial value is applied as the instruction information Z.
[0031]
As described above, in the present embodiment, the instruction information Z received in the
past from each other communication device D is applied to the processing by the signal
processing unit 52 when communicating with the other communication device D. As in the
second embodiment, a sound collection characteristic that is easy for the other party to listen to
is realized. Therefore, there is an advantage that the burden on the user of each communication
device D to adjust the sound collection characteristic of the other party communication device D
is reduced. Further, since the instruction information Z is stored for each other communication
device D, even if the optimum sound collection characteristics differ for each user of the
communication device D, the sound collection characteristics of the other communication device
D can be used individually There is also the advantage that it can be adjusted to the proper
characteristics for the
[0032]
Fourth Embodiment FIG. 6 is a block diagram of a communication device D according to a fourth
embodiment. As shown in FIG. 6, the storage device 14 of the communication device D of the
fourth embodiment stores a plurality of sound collection characteristics F. Each sound collection
characteristic F is configured to include the indication direction θz and the indication sensitivity
σz. One or both of the indication direction θz and the indication sensitivity σz are different for
each of the sound collection characteristics F stored in the storage device 14. Each of the
plurality of sound collection characteristics F is prepared in advance so that the sound collection
characteristics of the acoustic signal V are optimized under different typical call environments.
On the other hand, the instruction generation unit 54 generates instruction information Z for
specifying any of the plurality of sound collection characteristics F in response to an operation
from the user on the input device 32. That is, the instruction information Z in the present
embodiment does not include the instruction direction θz and the instruction sensitivity σz.
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[0033]
When the receiving unit 22 receives the instruction information Z from the other party
communication device D, the control unit 56 is specified by the instruction information Z
received by the receiving unit 22 among the plurality of sound collection characteristics F stored
in the storage device 14 The sound collection characteristic F is selected, and the signal
processing unit 52 (sound collection characteristic of the acoustic signal V) is controlled
according to the indication direction θz and the indication sensitivity σz of the sound collection
characteristic F. Also during the subsequent call, the control unit 56 selectively applies the sound
collection characteristic F according to the instruction information Z received from the other
party communication device D to the control of the signal processing unit 52.
[0034]
In the above embodiment, since any one of the plurality of collected sound pickup characteristics
F prepared in advance is selected according to the instruction information Z, the user of the other
party communication device D can use both of the instruction direction θz and the instruction
sensitivity σz. It is possible to reduce the burden on the user of each communication device D as
compared with the case of instructing.
[0035]
E: Fifth Embodiment FIG. 7 is a block diagram of a communication device D in a fifth embodiment
of the present invention.
As shown in FIG. 7, the communication apparatus D of the fifth embodiment has a configuration
in which the notification unit 36 is added to the elements of the first embodiment. The
notification unit 36 notifies the user that the sound collection characteristic of the own device is
controlled according to the instruction information Z received from the other party
communication device D. For example, a display device that displays an image indicating that
control of sound collection characteristics is in progress, or a sound emission device that emits
sound indicating that control of sound collection characteristics is in progress may be employed
as the notification unit 36. In addition, the structure which diverted the sound emission
apparatus 34 as the alerting | reporting part 36 is also suitable. When the signal processing unit
52 is controlled according to the instruction information Z received from the other party
communication device D, the control unit 56 notifies the user that the control according to the
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instruction information Z is being executed from the notification unit 36. .
[0036]
In the above embodiment, the notification unit 36 notifies that the sound collection characteristic
of the own device is adjusted according to the instruction from the other party of the
communication, so the situation where the sound collection characteristic of the own device is
adjusted without knowing It has the advantage of being able to avoid it. In the above description,
the fifth embodiment has been described based on the first embodiment, but the configuration of
the fifth embodiment including the notification unit 36 is similarly applied to the second to
fourth embodiments. It can be done.
[0037]
<F: Modified Example> Each of the above embodiments can be variously modified. The aspect of
a concrete modification is illustrated below. Two or more aspects arbitrarily selected from the
following examples may be appropriately combined.
[0038]
(1) Modification 1 The method of controlling the sound collection characteristic of the sound
signal V may be changed as appropriate. For example, a configuration may be employed in which
sound collection characteristics are controlled using a known sound zoom technique. Further,
although the sound collection characteristic is adjusted by beam forming processing for a
plurality of acoustic signals XA in the above example, a known sound collection body
(microphone) in which the sound collection characteristics (directing direction and sound
collection sensitivity) are variably controlled The configuration used may also be adopted. Under
the configuration in which the sound collection characteristic can be changed solely by the sound
collection body (a configuration using a directional sound collection body that can change the
directivity direction), a configuration in which a plurality of sound collection bodies 42 are
arranged and a signal processing unit The configuration having 52 can be omitted. As
understood from the above description, the plurality of sound collection bodies 42 and the signal
processing unit 52 in each of the above-described embodiments are elements (sound collection
means) of generating the sound signal V collected with variable directivity characteristics. It is an
illustration.
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[0039]
(2) Modification 2 In each of the above embodiments, the communication system 100 used for
voice communication has been illustrated, but a communication system (a video telephone
system, a video conference system, a remote education system, etc.) The present invention can
also be applied to a communication device used for. Moreover, although the mobile telephone
was illustrated as the communication apparatus D in each above form, the telephone which
communicates with the communication network 200 by wire communication may also be employ
| adopted as the communication apparatus D. FIG.
[0040]
(3) Modification 3 A configuration may also be adopted in which the possibility of adjustment of
the sound collection characteristic from the partner communication device D (permission /
prohibition) may be variably set according to the operation on the input device 32, for example.
When the adjustment of the sound collection characteristic is permitted, the sound collection
characteristic is controlled according to the instruction information Z in the same manner as
each of the above-described embodiments, and when the adjustment of the sound collection
characteristic is prohibited, the other communication device D Ignore the instruction information
Z.
[0041]
100 ... communication system, 200 ... communication network, D (D1, D2) ... communication
device, 12 ... arithmetic processing unit, 14 ... storage device, 20 ... communication device, 22 ...
reception unit, 24 ... ... Transmission unit, 32 ... Input device, 34 ... Sound emission device, 36 ...
Notification unit, 40 ... Sound collection device, 42 ... Sound collection body, 52 ... Signal
processing unit, 54 ... Instruction generation unit 56: control unit 62: directional processing unit
64: sensitivity adjustment unit.
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