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JP2007274463

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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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2007274463
An object of the present invention is to provide a teleconferencing device that does not require
much time for installing equipment. In the teleconferencing device, a plurality of arrangement
patterns of conference participants (speakers) are stored in advance in a memory connected to a
control unit. Then, when the teleconference device 1 is installed, the arrangement pattern
according to the conference mode can be switched by the remote control 10. The user operates
the remote control 10 to input the number of conference participants and the conference mode,
and further, selects the arrangement pattern of the conference participants displayed on the
display unit 101 or the monitor 52 to select a remote conference to be held. An arrangement
pattern can be set according to the situation. Also, when the position of the conference
participant is slightly different in the selected arrangement pattern, the user operates the arrow
key of the remote control 10 or causes the microphone array 30 to pick up the sound emitted
from the voice output unit. Thus, the arrangement pattern of the conference participants can be
corrected. [Selected figure] Figure 6
Teleconferencing device
[0001]
The present invention relates to a teleconferencing device for teleconferencing between different
points via a network or the like.
[0002]
Conventionally, there has been a teleconferencing system in which a conference is held between
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distant points, such as between the head office and a sales office.
As such a remote conference system, for example, as described in Patent Document 1, one
microphone is installed for each of the conference participants, and voices of the respective
speakers are collected, and a zoom-up camera is used. Discloses a video conference system for
shooting a speaker. JP-A-2-202275
[0003]
In the video conference system as shown in Patent Document 1, as described above, one
microphone must be installed for each conference participant and wiring processing must be
performed, and preparation of the conference is very time-consuming. There was a problem of
[0004]
In order to save the trouble of preparation for the remote conference, a conference room
dedicated to the remote conference may be provided, and a microphone and a camera may be
installed in advance for the remote conference.
However, the arrangement of participants in the teleconference is not always the same. That is,
as a pattern of teleconferencing, there is a global mode in which a conference is advanced while
talking with a remote place, a local mode in which a conference is centrally held at one point, and
other places participate in the conference auxiliaryly. The arrangement pattern of the conference
participants differs depending on the teleconference pattern. In addition, the number of
participants in the conference also varies each time. Therefore, even when a conference is
performed in a conference room dedicated to teleconferencing, it is necessary to change the
arrangement of equipment, making preparation of the conference complicated, and it was not
possible to conduct teleconferencing easily.
[0005]
Then, an object of this invention is to provide the teleconference apparatus which does not
require time-consuming installation of materials.
[0006]
The present invention has the following configuration as means for solving the above-mentioned
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problems.
[0007]
(1) Microphone array provided with a plurality of microphones, Storage means for storing a
plurality of arrangement patterns of conference participants at the time of meeting, Arrangement
information setting means for receiving selection of the arrangement pattern, and Arrangement
information setting means And a pattern setting means for reading out the arrangement pattern
from the storage means; and a sound collection beam signal in the direction of each conference
participant from signals collected by the microphones of the microphone array based on the
arrangement pattern read out by the pattern setting means. A sound collection beam forming
means for forming the sound collection beam forming means; and a communication means for
transmitting the sound collection beam signal in the direction of each of the conference
participants formed by the sound collection beam forming means as an audio signal.
[0008]
In this configuration, the teleconferencing device is provided with a microphone array, and from
the signals collected by the microphones of the microphone array, forms a collected beam signal
in the direction of each conference participant.
Therefore, when teleconferencing is to be performed, the user can easily perform
teleconferencing by installing only the teleconferencing device without separately installing a
microphone.
Further, in this configuration, the teleconference device stores a plurality of arrangement
patterns of the conference participants in the conference, and the user can select the
arrangement pattern by operating the arrangement information setting means.
Therefore, even if the user changes the arrangement of participants according to the contents of
the remote conference, the user can easily perform the remote conference by selecting the
arrangement pattern of the conference participants without changing the arrangement and
wiring of the microphones. be able to.
[0009]
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(2) The arrangement information setting means receives the number of participants in the
meeting and the remote conference pattern when selecting the arrangement pattern, and the
pattern setting means receives the number of meeting participants accepted by the arrangement
information setting means, and the conference The arrangement pattern of the conference
participant is read out from the storage means based on the pattern of
[0010]
In this configuration, the teleconference device receives the number of conference participants
and the conference mode at the time of selecting the arrangement pattern of the conference
participants at the time of the conference, and reads the arrangement pattern of the conference
participants based on this information.
Therefore, the user can set the arrangement pattern according to the situation of the
teleconference.
[0011]
(3) An audio output means for emitting sound is provided, wherein the microphone array picks
up the sound emitted by the audio output means, and the sound collecting beam forming means
generates an audio signal collected by the microphone array. Based on the arrangement pattern,
the direction of the conference participant who forms the sound collection beam signal is
corrected.
[0012]
In this configuration, when the arrangement pattern of the conference participant is corrected,
the sound collection beam forming means is configured to collect the voice emitted by the sound
output means of the arrangement information setting means by the microphone array. Based on
the audio signal picked up by the array, the direction of the conference participant forming the
picked up beam signal is corrected.
Therefore, the teleconferencing device corrects the direction in which the sound collection beam
signal is formed based on the sound actually emitted, so that it is possible to pick up the sound
emitted by the conference participant with higher accuracy.
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[0013]
(4) The arrangement information setting means is provided with a display means for displaying
the arrangement pattern of the conference participants when the arrangement information
setting means receives the selection of the arrangement pattern.
[0014]
In this configuration, the display means displays the arrangement pattern of the conference
participants when selecting the arrangement pattern.
Therefore, since the user can confirm the arrangement pattern of the conference participants
displayed on the display means and select the arrangement pattern, the user is prevented from
erroneously selecting an arrangement pattern different from the actual arrangement pattern of
the conference. it can.
[0015]
According to the teleconferencing device of the present invention, since the microphone array is
integrally provided, when performing teleconferencing, the remote conferencing device can be
easily and easily installed by installing only the teleconferencing device without separately
installing a microphone. You can hold a meeting. In addition, the teleconference device stores a
plurality of layout patterns of the conference participants in the conference, and the user can
select the layout pattern by operating the layout information setting means. Even if the
arrangement of the participants changes, it is possible to easily carry out the remote conference
simply by selecting the arrangement pattern of the conference participants without changing the
arrangement and wiring of the microphones.
[0016]
FIG. 1 is a perspective view of a teleconference device according to an embodiment of the
present invention. As shown in FIG. 1, the teleconferencing device 1 has a rectangular
parallelepiped shape elongated in one direction, and includes eight speaker units SP1 to SP8
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constituting the speaker array 26 and 14 microphones constituting the microphone array 30.
The units MIC1 to MIC14 are arranged on a straight line at regular intervals on the front side.
Although not shown, an input / output connector 64 is provided on the back side of the
teleconference device 1.
[0017]
The number of speaker units constituting the speaker array 26 and the number of microphone
units constituting the microphone array 30 are not limited to the above.
[0018]
A video camera 50 and a monitor 52 can be connected to the teleconferencing device 1, and
when these are connected, the teleconferencing device 1 is placed on the upper surface of the
monitor 52, for example, as shown in FIG. The video camera 50 is mounted on the upper surface
of the device 1 and used.
In addition, the teleconferencing device 1 is used by being placed on the end of a conference
desk or on a table regardless of whether the video camera 50 and the monitor 52 are connected.
[0019]
The teleconferencing device 1 is connected to a network such as the Internet or LAN to use
another protocol such as SIP to connect to another voice conference device connected to the
network, an audio signal collected by the microphone array 30, The video signals captured by the
video camera 50 can be exchanged (transmitted / received), whereby a remote conference can be
performed. Further, the teleconference device 1 can exchange (transmit and receive) an audio
signal and a video signal by connecting to another teleconference device using an audio cable
and a video cable without connecting to the network.
[0020]
By using the teleconferencing device 1, the user can conduct an audio conference by voice only
between different points or perform a video conference by audio and video. When performing a
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voice conference using the teleconferencing device 1, the teleconferencing device 1 may be
connected to a network without connecting the video camera 50 or the monitor 52 to the
teleconferencing device 1, or another teleconferencing device and audio may be used. Connect
using a cable. On the other hand, when teleconferencing is performed using the teleconference
device 1, as shown in FIG. 1, the video camera 50 and the monitor 52 are connected to the
teleconference device 1, and the teleconference device 1 is connected to the network. Or connect
using an audio cable and a video cable.
[0021]
Next, the specific configuration of the teleconference device 1 will be described. FIG. 2 is a
functional block diagram of the teleconference device according to the embodiment of the
present invention. The teleconferencing device 1 includes a remote controller (remote controller)
10, a signal receiving unit 12, a control unit 14, a memory 16, a speaker signal processing unit
20, D / A converters 22-1 to 22-8, and a sound emitting amplifier 24-1. To 24-8, a speaker array
26 consisting of eight speaker units SP1 to SP8, a microphone array 30 consisting of 14
microphone units MIC1 to MIC14, sound pickup amplifiers 32-1 to 32-14, an A / D converter 34
-1 to 34-14, microphone beam generation unit 36, microphone signal selection unit 38, echo
cancellation unit 40, video camera 50, monitor 52, video data processing unit 54, codec (CODEC)
60, input / output interface (I / F) And 62) and an input / output connector 64.
[0022]
The remote controller 10 is for the user to set the arrangement pattern of the participants
(speakers) of the conference after the teleconference device 1 is installed. The remote control 10
outputs as a signal (infrared light) according to the user's operation. The remote controller 10
also includes a display unit 101 that displays information when setting the arrangement pattern
of the conference participants, and an audio output unit 102 that outputs a sound when the
arrangement pattern of the conference participants is corrected.
[0023]
The signal receiving unit 12 receives (receives) a signal (infrared light) output from the remote
control 10 and outputs the signal to the control unit 14.
[0024]
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The control unit 14 reads out the arrangement pattern of the conference participant from the
memory 16 according to the signal transmitted from the remote control 10, the speaker signal
processing unit 20, the microphone beam generation unit 36, the video camera 50, and the video
data processing unit 54. Control at least one of
[0025]
The memory 16 stores a plurality of arrangement patterns of participants (speakers) at the time
of a conference.
[0026]
The speaker signal processing unit 20 performs delay processing and amplitude processing and
the like specific to each of the speaker units SP1 to SP8 of the speaker array 26 on the basis of
the input sound signal based on the arrangement pattern information of the speaker set by the
remote control 10. Perform individual sound emission signal.
Here, as the sound emission directivity, one that makes the emitted voice converge at a
predetermined position in the longitudinal direction of the teleconference device 1, or one that
sets the virtual point sound source and causes the emitted voice to diverge from the virtual point
sound source There are individual sound emission signals such that the sound emission
directivity is realized by the sound emission from the speaker units SP1 to SP8.
Then, the speaker signal processing unit 20 outputs these individual sound emission signals to D
/ A converters 22-1 to 22-8 provided for each of the speaker units SP1 to SP8.
[0027]
The D / A converters 22-1 to 22-8 convert the individual sound emission signals into an analog
format and output the converted signals to the sound emission amplifiers 24-1 to 24-8.
[0028]
The sound emission amplifiers 24-1 to 24-8 amplify the individual sound emission signals and
apply them to the speaker units SP1 to SP8.
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[0029]
The speaker units SP1 to SP8 are composed of nondirectional speakers, convert the sound of the
given individual sound emission signal and emit the sound to the outside.
[0030]
Each of the microphone units MIC1 to MIC14 constituting the microphone array 30 may be
nondirectional or directional, but desirably is directional.
Each of the microphone units MIC1 to MIC14 picks up the voice from the outside of the
teleconference device 1 and converts it into an electric signal, and outputs the pick signal to each
of the sound pickup amplifiers 32-1 to 32-14.
Each of the sound pickup amplifiers 32-1 to 32-14 amplifies the sound pickup signal and applies
it to the A / D converters 34-1 to 34-14.
The A / D converters 34-1 to 34-14 digitally convert the collected sound signal and output it to
the microphone beam generation unit 36.
Therefore, the collected sound signals from the microphone units MIC1 to MIC14 are input to
the microphone beam generation unit 36.
[0031]
The microphone signal selection unit 38 receives the collected sound beam signals MB1 to
MB14, compares the signal strengths, and selects the collected sound beam signal MB that meets
the predetermined conditions set in advance. For example, when transmitting only the voice from
one speaker to another teleconferencing device, the microphone signal selection unit 38 selects a
collected sound beam signal with the highest signal strength, and sets it as the specified sound
collected beam signal MB. Output to the echo cancellation unit 40. In addition, if a plurality of
collected sound beam signals are required as when a plurality of audio conferences are
conducted in parallel, the collected sound beam signals according to the situation are
sequentially selected, and each of them is selected as an individual specified sound collected
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beam The signal is output to the echo cancellation unit 40 as a signal MB. Further, the
microphone signal selection unit 38 outputs, to the control unit 14, sound collection environment
information including the sound collection direction (sound collection directivity) corresponding
to the selected specific sound collection beam signal MB. The control unit 14 specifies the
speaker direction based on the sound collection environment information, and sets the sound
emission directivity given to the speaker signal processing unit 20.
[0032]
The echo cancellation unit 40 includes an adaptive filter 402 and a post processor 404 including
an adder. The adaptive filter 402 generates a pseudo-regression sound signal based on the sound
collection directivity of the selected sound collection beam signal MB for the input sound signal.
The post processor 404 subtracts the pseudo-regression sound signal from the sound collection
beam signal MB output from the microphone signal selection unit 38, and outputs the result as
the output sound signal to the codec 60. By performing such echo cancellation processing,
appropriate echo cancellation is performed, and only the speaker voice of the own apparatus is
transmitted to the network as an output speech signal.
[0033]
The video camera 50 captures an image of a participant of the conference, and outputs the image
data to the image data processing unit 54.
[0034]
The monitor 52 displays video data from another teleconference device output from the video
data processing unit 54.
Further, at the time of initial setting of the teleconference device 1, in conjunction with the
operation of the remote control 10, the arrangement pattern of the participants (speakers) is
displayed.
[0035]
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The video data processing unit 54 outputs the video data output from the video camera 50 to the
codec 60. Further, the video data processing unit 54 outputs the video data output from the
codec 60 to the monitor 52.
[0036]
The codec 60 compresses the audio signal output from the echo cancellation unit 40 and the
video signal output from the video data processing unit 54 according to a certain rule, and sends
the compressed audio signal and the compressed video signal to the input / output I / F 62.
Output. Also, the codec 60 decompresses the compressed audio signal and the compressed video
signal sent from the input / output I / F 62 according to a certain rule, and outputs the audio
signal to the speaker signal processing unit 20, and the video signal is a video data processing
unit Output to 54.
[0037]
The input / output I / F 62 converts the compressed audio signal and the compressed video
signal output from the codec 60 into a data format (protocol) corresponding to the network, and
transmits the data to the network via the input / output connector 64. Further, the input / output
I / F 62 outputs the compressed audio signal and the compressed video signal to another
teleconference device via the audio signal cable and the video signal cable connected to the input
/ output connector 64. Further, the input / output I / F 62 is a data format corresponding to the
network (a compressed audio signal and a compressed video signal from another teleconference
device input through the network (LAN) connected to the input / output connector 64). Protocol)
and output to the codec 60. Further, the input / output I / F 62 outputs, to the codec 60, the
compressed audio signal and the compressed video signal from the other teleconference device
input through the audio signal cable and the video signal cable connected to the input / output
connector 64. Do.
[0038]
Here, the directivity characteristics of the microphone array will be described. FIG. 3 is a diagram
for explaining the operation principle of the microphone array. In FIG. 3, voices uttered by the
speaker W who is a conference participant arrive sequentially from the closest microphone unit,
but each microphone unit is delayed, and voices emitted from the sound source are output in the
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same phase. Let's do it. Since voices are output in the same phase from each microphone unit,
mixing them will enhance the voice. In addition, since voices emitted from other positions are
output from the respective microphone units with different phases, they will be canceled when
mixed, and the main sensitivity of the microphone can be directed only in the direction of the
sound source.
[0039]
Next, characteristic operations of the present invention will be described. FIG. 4 is a diagram
showing a state in which the teleconference is performed in the global mode, and a sound
collection beam signal in the case where the teleconference is performed in the global mode. FIG.
5 is a diagram showing a state in which the teleconference is performed in the local mode and a
sound collection beam signal in the case where the teleconference is performed in the local
mode. In a teleconference conducted by a plurality of persons, as shown in FIG. 4A, conference
participants are lined up in front of the teleconferencing device 1 and a conference is conducted
in a global mode in which the conference is progressed while interacting with a remote place
Also, as shown in FIG. 5A, a conference participant may conduct a conference centering around a
desk at a central location, and at other points, conduct a conference in a local mode in which the
conference is to participate subsidively in the conference.
[0040]
When teleconferencing is performed in the arrangement pattern (global mode) as shown in FIG.
4, the distances from the seating positions of the respective conference participants to the
microphone array 30 of the teleconferencing device 1 are substantially equal. Therefore, in this
case, if the focal position of the sound collection beam signal MB is set near the seating position
of each conference participant, sound collection with good frequency characteristics can be
performed.
[0041]
On the other hand, in the case of performing the teleconference device in the arrangement
pattern (local mode) as shown in FIG. 5, the distance from the seating position of each conference
participant to the microphone array 30 of the teleconference device 1 is different. If the focal
position of the beam signal MB is set in the vicinity of the seating position of each conference
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participant, the frequency characteristic of the picked up sound is not so good. Therefore, in this
case, it is preferable to set the focus position of the sound collection beam signal MB to be
farther than the seating position of each conference participant, or to set a parallel wave without
focusing. This can improve the frequency characteristics.
[0042]
Further, in this case, since the distance between the teleconference device 1 and each conference
participant is different, it is preferable to set different gains for each collected sound beam signal.
[0043]
Thus, it is necessary to change the directivity characteristics of the microphone array depending
on the arrangement pattern of the conference participants.
Therefore, in the teleconference device 1 of the present invention, a plurality of arrangement
patterns of conference participants (speakers) are stored in advance in the memory 16 connected
to the control unit 14. Then, when the teleconference device 1 is installed, the arrangement
pattern according to the conference mode can be switched by the remote control 10.
[0044]
The memory 16 stores, for example, the following arrangement patterns. FIG. 6 is an example of
an arrangement pattern of the conference participants stored in the memory.
[0045]
When eight participants attend a teleconference in the local mode, the arrangement shown in
FIG. 6A is obtained. In this case, if the seating position of each conference participant is set to the
focal position of the collected beam signal MB as described above, the frequency characteristic is
deteriorated, so that the focal position of the collected beam signal MB is joined to each
conference It may be set to be farther than the sitting position of the person, or may be set to be
a parallel wave without focusing.
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[0046]
When four participants attend a teleconference in the local mode, they are arranged to sit at the
positions of black circles or white circles shown in FIG. 6B. Also in this case, the difference in
distance between the microphone array 30 of the teleconferencing device 1 and each conference
participant is large, and as described above, the seating position of each conference participant is
set as the focal point of the collected beam signal MB. Then, since the frequency characteristic is
deteriorated, it is preferable to set the focal position of the collected beam signal MB to be
farther than the seating position of each conference participant, or to set a parallel wave without
focusing. .
[0047]
When four participants attend a teleconference in the global mode toward the conference desk,
the arrangement is as shown in FIG. 6C. In this case, since the difference in distance between the
microphone array 30 of the teleconference device 1 and each conference participant is small, as
described above, the seating position of each conference participant is set to the focal position of
the sound collection beam signal MB. Set
[0048]
When two conference participants head to the conference desk to conduct a remote conference
in the global mode or the local mode, the arrangement is as shown in FIG. 6 (D). In this case, as
shown in FIG. 6D, the arrangement pattern of the patterns 1 to 3 can be considered. That is, the
conference participants usually sit at substantially the same distance from the teleconferencing
device 1 and at a position opposite to the conference desk. Therefore, in such a case, since the
difference in distance between the microphone array 30 of the teleconference device 1 and each
conference participant is small, the seating position of each conference participant is set as the
focal position of the sound collection beam signal MB Do.
[0049]
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Next, in the remote conference device 1, as described above, when selecting the arrangement
pattern of the conference participants, the arrangement pattern of the conference participants
can be set by operating the remote control 10. The user operates the arrangement pattern
selection key of the remote controller 10 when selecting the arrangement pattern of the
conference participants. When the remote controller 10 detects the operation of the layout
pattern selection key, the display unit 101 displays the number of participants in the conference
and the content prompting the user to enter the conference mode. When the user inputs the
number of meeting participants and the meeting mode according to the display, the display unit
101 of the remote control 10 displays the arrangement pattern of the meeting participants
according to the input content. The user selects a corresponding arrangement pattern from the
arrangement patterns displayed on the display unit 101. When there are a plurality of
arrangement patterns, the user can switch the image of the arrangement pattern by operating
the feed key or the return key.
[0050]
When the arrangement pattern is selected, the remote controller 10 outputs the arrangement
pattern information as a signal. When the control unit 14 receives this signal via the signal
reception unit 12, the control unit 14 reads out arrangement pattern information from the
memory based on the information of the selected arrangement pattern, and outputs this
information to the microphone beam generation unit 36. The microphone beam generation unit
36 generates a microphone beam based on the arrangement pattern information.
[0051]
The user can correct the arrangement pattern of the conference participants by operating the
arrow key when the positions of the conference participants are slightly different in the selected
arrangement pattern. In this case, the user moves the position of each conference participant
displayed on the display unit 101 by operating the arrow key of the remote control 10, and
presses the determination key. When the remote controller 10 detects that the enter key has
been operated, it outputs positional information of the moved conference participant as a signal.
When the control unit 14 receives this signal via the signal reception unit 12, the control unit 14
outputs this information to the microphone beam generation unit 36. The microphone beam
generation unit 36 corrects the direction in which the microphone beam is generated and the
focal position based on the position information of the conference participant.
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[0052]
In addition, the remote control 10 is provided with the audio output unit 102, and the user
operates the correction key of the remote control 10 at the seating position of the conference
participant when the arrangement pattern of the conference participant is corrected. The sound
is emitted from the sound output unit 102, and the sound is collected by the microphone array
30, and a sound collection beam signal is formed in the microphone beam generation unit 36
based on the sound signal collected by the microphone array 30. The direction of the participant
can be corrected. In this case, when it is detected that the user operates the correction key, the
remote controller 10 outputs a signal for notifying the remote conference device 1 of the
execution of the voice correction mode, and causes the voice output unit 102 to emit a test
sound. When the control unit 14 receives this signal through the signal receiving unit 12, the
control unit 14 notifies the microphone beam generation unit 36 that the voice correction mode
is to be executed. When the microphone beam generation unit 36 receives this notification, the
microphone beam generation unit 36 corrects the direction in which the microphone beam is
generated and the focal position based on the test sound collected by the microphone array 30.
[0053]
As described above, since the teleconferencing device 1 corrects the direction in which the sound
collection beam signal is formed based on the user's operation and the voice actually emitted, the
voice generated by the conference participant can be collected more accurately. It can sound.
[0054]
Further, in the teleconferencing device 1, when the monitor 52 is connected to perform a video
conference, the content displayed on the display unit 101 of the remote control 10 when
selecting the arrangement pattern of the conference participants Can be displayed on the
monitor 52.
The user may set the display setting in advance to display the setting contents when selecting the
arrangement pattern of the conference participants only on the monitor 52 or only on the
display unit 101 of the remote control 10. It is also possible to display on both sides.
[0055]
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As described above, in the teleconferencing apparatus of the present invention, a plurality of
arrangement patterns of the conference participants are stored, and the user can set the
arrangement pattern according to the current conference by operating the remote control. Voice
can be collected with high quality without leaking the voice of the person. Further, when
performing a teleconference, it is only necessary to set or correct the arrangement pattern of the
conference participants after the teleconference device is installed, so that the user can feel free
to conduct the teleconference.
[0056]
In the teleconferencing device 1, the voice transmitted from another teleconferencing device is
set in advance by the remote control 10, and the arrangement pattern of the conference
participants is transmitted to the respective conference participants from the speaker array.
Depending on the setting, sound may be emitted individually as a sound beam, or sound may be
emitted from the speaker array to all the conference participants.
[0057]
Further, the teleconference device 1 is provided with a direction switching mechanism (not
shown) for switching the imaging direction of the video camera 50, and by setting in advance by
the remote controller 10, according to the setting of the arrangement pattern of the conference
participants. By controlling the focus / zoom / imaging direction of the video camera 50 with a
signal from the control unit 14, it is possible to image only the speaker who is speaking among
the conference participants or to image all the conference participants.
[0058]
FIG. 1 is a perspective overview of a teleconference device according to an embodiment of the
present invention.
FIG. 1 is a functional block diagram of a teleconference device according to an embodiment of
the present invention.
It is a figure for demonstrating the operation principle of a microphone array. It is a figure which
shows a mode that teleconferencing is performed in a global mode, and the sound collection
beam signal in the case of teleconferencing performed in a global mode. It is a figure which
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shows a mode that teleconferencing is performed by local mode, and a sound collection beam
signal in the case of teleconferencing being performed by local mode. It is an example of an
arrangement pattern of a meeting participant which memory memorizes.
Explanation of sign
[0059]
1-Teleconferencing device 10-Remote control 12-Signal reception unit 14-Control unit 16Memory 20-Speaker signal processing unit 22-D / A converter 24- Amplifier for sound emission
26-Speaker array 30-Microphone array 32-Sound collection Amplifier 34-A / D converter 36microphone beam generation unit 38-microphone signal selection unit 40-echo cancellation unit
50-video camera 52-monitor 54-video data processing unit 60-codec 62-input / output I / F 64Input / output connector 101-display unit 102-voice output unit 402-adaptive filter 404-post
processor
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