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DESCRIPTION JPH05153582

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DESCRIPTION JPH05153582
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the
improvement of a teleconferencing person camera pivoting system for pivoting a person camera
to a person in communication.
[0002]
2. Description of the Related Art FIG. 4 is a block diagram of a conventional teleconferencing
person camera turning system. FIG. 4 shows an example in the case of six speakers participating
in a video conference, and six speakers 11 to 16 sit at substantially equal intervals on the outer
circumference of the video conference table 40, and for the video conference Six microphones 21
to 26 corresponding to the speakers 11 to 16 are placed on the table 40 in order to capture
voices emitted from the speakers 11 to 16 and send them to the other party.
[0003]
In this case, it is necessary to turn so as to photograph the speaker who is talking the person
camera 7. This turning method will be described below. In order for the maintainer to set the
direction in which the speakers 11-16 are supposed to sit and to photograph the speakers 11-16
with the person camera 7, the maintainers are persons The values of the angles at which the
cameras 7 are directed to positions where the speakers 11-16 are supposed to sit are determined
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and stored in the preset memory 31.
[0004]
Then, for example, when the speaker 13 is busy, the voice detected by the microphone 23 is
maximized, and the voice recognition unit 30 knows that the speaker 13 is busy and controls the
camera that the speaker 13 is busy. The voice in speech is sent to the encoding unit 8 while
notifying the unit 32.
[0005]
The camera control unit 32 reads the angle of the position where the speaker 13 seems to sit
from the preset memory 31, turns the human camera 7 in the direction of the read value of the
angle, photographs the speaker 13, and codes the video signal Send to the conversion unit 8.
[0006]
The encoding unit 8 encodes the sent audio and video signals, sends them to the other party, and
performs a video conference.
[0007]
However, in the conventional teleconferencing person camera turning system, the maintenance
person sets the directions of the microphones 21 to 26 in advance before the meeting, and the
persons 11 to 16 of the person camera 7 There is a problem that it takes time and effort to find
the value of each angle of the position considered to be sitting and store it in the preset memory
31 and the person camera 7 faces in the direction of the value of the angle stored in the preset
memory 31 However, the speaker does not follow even if it is in a slightly moved position, and
when the speaker is in a slightly moved position, there is a problem that the speaker becomes an
edge of the video screen or is not displayed on the screen.
[0008]
An object of the present invention is to provide a video conference person's camera turning
system which does not require prior preparation before a conference and can be displayed
substantially in the middle of a video screen even when the speaker is in a slightly moved
position.
[0009]
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2
FIG. 1 shows the principle of the present invention.
The sound from the position where the circumference of the end of the TV conference table is
equally divided by n at the center of the TV conference table where the positions of the n
speakers sit on the circumference The first microphone 1 on which n unidirectional microphones
are radially arranged is disposed so as to separate and detect the microphones, and the upper
position of the first microphone 1 including the center line of the video conference table, A
second microphone 2 in which m high-sensitivity unidirectional microphones are radially
arranged is attached so as to separate and detect voices from positions where the n equal
divisions are divided into m equal parts, and shown in FIG. And transmitting the coordinates of
the center position of the n equally divided circumference corresponding to the largest
unidirectional microphone detected by the first microphone 1 to the microphone controller 4 and
the camera controller 5 When the first voice recognition unit 3 and the coordinates of the center
position are received, the second microphone The second voice recognition that sends the
camera control unit 5 an angle of the direction of the microphone control unit 4 and the high
sensitivity unidirectional microphone with the largest detected voice in the second microphone 2.
When the coordinates of the center position of the circle divided into n parts and the n equal
parts are received, the person camera 7 is turned in the direction of the coordinates, and when
the angle is received, the person camera 7 is converted to the coordinates of the center position
And the camera control unit 5 that pivots in the direction of the coordinate of the direction of the
angle on the n equally divided circumference.
[0010]
According to the present invention, the first speech recognition unit 3 detects the center position
of the n-divided circle corresponding to the unidirectional microphone in which the speech
detected in the first microphone 1 is the largest. Assuming that n is 3, for example, the
coordinates of the center position 18 of the circle divided into three equal parts shown in FIG. 1B
are calculated and sent to the microphone control unit 4 and the camera control unit 5.
[0011]
Then, the microphone control unit 4 calculates an angle at which the second microphone 2 is
directed in the direction of the coordinates of the center position 18, and turns the second
microphone 2 in the direction of the determined angle.
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Then, the second voice recognition unit 6 directs the direction of the high sensitivity unidirectional microphone in which the voice detected in the second microphone 2 is the largest, for
example, the direction substantially close to the speaker 17 shown in FIG. Are sent to the camera
control unit 5.
[0012]
The camera control unit 5 calculates the angle of the direction of the coordinates of the central
position 18 in one step and directs the human camera 7 in the direction of the determined angle,
and in two steps, the coordinate of the central position 18 is 3 The angle of the direction of the
coordinates of the point of intersection of the circle divided equally and the direction
substantially close to the speaker 17 received from the second voice recognition unit 6 is
calculated and determined, and the human camera 7 is directed in the direction of the
determined angle. .
[0013]
That is, even if the pre-meeting preparation is not necessary and the speaker is at a slightly
moved position, the second microphone 2 detects a direction substantially close to the speaker,
and the person camera 7 is substantially close to the speaker Because it turns in the direction, it
can be made to appear in the approximate middle of the video screen.
[0014]
FIG. 2 is a block diagram of a teleconference person's camera turning system according to an
embodiment of the present invention, and FIG. 3 is a diagram showing a layout of a microphone
and a person camera according to the embodiment of the present invention and coordinates of
microphones.
[0015]
2 and 3 also show an example in which six speakers 11 to 16 sit at substantially equal intervals
on the outer circumference of the TV conference table 20, and the microphone 1 is shown in
FIGS. 3 (A) and 3 (B). It is placed at the center of the TV conference table 20 as shown in FIG.
[0016]
As shown in FIG. 3B, the microphone 2 is attached to a ceiling which is a position in the upper
direction of the microphone 1 including the center line of the TV conference table 20.
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The person camera 7 is in the center line direction of the TV conference table 20 so that the
speakers 11 to 16 can be easily photographed as shown in FIGS. 3 (A) and 3 (B).
[0017]
The configuration of the TV conference person camera turning system will be described. As
shown in FIG. 3A, the circumference of the end of the TV conference table 20 which is placed in
the middle of the TV conference table 20 and on which the speakers 11 to 16 sit. The
microphone 1 has six unidirectional microphones arranged radially so that it can separate and
detect voices from six equally divided positions, and the unidirectional microphone with the
largest voice detected in the microphone 1 The voice recognition unit 3 that sends the
coordinates of the center position of the corresponding six equally divided circumferences to the
microphone control unit 4 and the camera control unit 5, and the microphone control that
directs the microphone 2 in the direction of the coordinates when receiving the coordinates of
the center position For example, three high-sensitivity uni-directional microphones are arranged
radially at an angle of 10 degrees so as to be able to separate and detect the sound from the
position where it is attached to the ceiling and divided into three equal parts, for example Mike 2
and Mike 2 The voice recognition unit 6 sends the microphone control unit 5 an angle in the
direction of the high sensitivity unidirectional microphone with the largest detected voice in the
microphone control unit 5 and the coordinates of the center position of the circle divided into six
equal parts. When the camera 7 is pivoted in the direction of the coordinates and the angle is
received, the camera which pivots the person camera 7 in the direction of the coordinate in the
direction of the angle on the six equally divided circumference having the coordinates of the
central position The control unit 5 is configured.
[0018]
Therefore, for example, if the voice detected by the uni-directional microphone of the
microphone 1 facing the circumference divided into six equal parts including a in FIG. 3A is the
largest, the voice recognition unit 3 controls the coordinates of B in the microphone Send to the
unit 4 and the camera control unit 5.
[0019]
The microphone control unit 4 and the camera control unit 5 calculate the angle of the direction
of the coordinates of B, respectively, and direct the microphone 2 and the person camera 7 in the
direction of B.
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If the speaker 12 is, for example, on the right side of B and the voice detected by the highsensitivity unidirectional microphone on the right side of the microphone 2 is the largest, an
angle of 10 degrees to the right is sent to the camera control unit 5.
[0020]
Then, the camera control unit 5 calculates the direction of the coordinate of 10 degrees right
from the point b of the circumference having a point b, and turns in the direction in which the
human camera 7 is calculated.
Of course, if the speaker 12 is in the position of i, the person camera 7 does not turn, and if it is
on the left, the direction of the coordinate of 10 degrees left from the point i of the circle with a
point is calculated to calculate the person camera 7 Turn in the direction.
[0021]
That is, by the voice detection by the microphone 2, the position of the speaker can be detected
at an angle of a position obtained by further dividing the circle into three equally, and the human
camera 7 is directed in the detected direction. 7 is directed in the direction of the short speaker.
[0022]
Of course, if the directivity characteristic of the high-sensitivity uni-directional microphone is
good, the number can be doubled, and if it can be detected at an angle of a position obtained by
further dividing the six equally divided circumferences, the human camera 7 will Can be turned
closer to
Therefore, even if the speaker is in a slightly moved position, the human camera 7 is directed
substantially to the direction of the speaker, so that the speaker appears in the approximate
middle of the image.
[0023]
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The audio detected by the microphone 2 and the video taken by the human camera 7 are
encoded by the encoding unit 8 and sent to the other party to conduct a video conference.
Therefore, even if the pre-meeting preparation is unnecessary and the speaker is at a slightly
moved position, the microphone 2 detects a direction substantially near to the speaker and turns
the human camera 7 in a direction substantially near to the speaker Therefore, it can be
displayed in the approximate middle of the video screen.
[0024]
As described above in detail, according to the present invention, it is possible to make the image
appear substantially in the middle of the video screen even if the speaker is in a slightly moved
position without the need for prior preparation before the conference. There is an effect that a
teleconferencing person's camera turning system capable of
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