JPS6377282A - Image pick-up control device - Google Patents

Abstract

PURPOSE:To eliminate the operation to orient a camera control board to the direction of a speaker at each time by detecting a sound strength from respective microphones installed a meeting desk and moving automatically a camera to the direction with a high strength. CONSTITUTION:When the voice of a speaker is inputted to any of microphones 9-13, for the signal, a peak value is detected by peak value detecting devices 18-22, the output is held for a constant time by holders 23-27 and inputted to a deciding device 28. The deciding device 28 decides a maximum peak value input out of respective input signals, outputs the signal to show a corresponding microphone position and it is inputted to a step-shaped driving control signal generating device 29. The generating device 29 generates a step-shaped driving signal in which the direction of a camera is determined at a control signal level beforehand by the output of the circuit 28, and the camera is moved by a driving device to the direction of the meeting desk placing the microphones 9-13 in which a maximum peak value is inputted. When speaking is inputted to other microphones 9-13, the camera is automatically moved in the direction of the meeting desk where the camera is placed, in the same way.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a separate imaging device for visually controlling a camera for imaging conference attendees in the direction of a speaker in an electronic conference system or the like.

BACKGROUND ART FIG. 3 shows an example of an electronic conference system currently used for five attendees.

In Fig. 3, 1 is a terminal connected to the transmitting/receiving unit 13, 2 is a multiplex decoding device (D-MUX), and 3 is a video control device (V
CU), 4 is the audio 11711 m unit (ACU), 5
6(d) is the first camera that images the entire conference room, 6(d) is the second camera that images the conference attendees, 7 is the television receiver 13i (TVl) that displays the conference room image of the other party, and 8 is the other party. A television receiver (T
v2), 9 is the first microphone, 1o is the 27th microphone, 11 is the third microphone, 12 is the fourth microphone, 13 is the fifth microphone, 1
4 is a camera control panel, 15 (-j speaker, 16 is an individual conference table, 17 is a small organ, 31 is a camera control dog fighting force terminal, 32
is a switch.

The video signal outputs of the first camera 5 and the second camera 6 are input to the multiplex decoding device 2 via the video control unit (VCU) 3, and are displayed on the other party's television. In addition, the video signal of the other party from the multiplex decoding device 2 is transmitted to the video control device (
VC:U) 3'i via television receivers 7 and 8
1st microphone 9, 2nd microphone 10
．． The outputs of the third microphone 11, fourth microphone 12, and fifth microphone 13 are manually inputted to the ItXf voice control unit (ACU) 4. The sound angle control device 4 synthesizes each microphone output signal and outputs it to the multiplex decoding device 2. The synthesized voice is transmitted to the other party's 61 Lisbeaker (・ζ. Also, the voice signal from the other party's multiplexer 4 encoder 2 is transmitted to the voice 1 rli Sono device (ACTT) 4
is supplied to the speaker 15 via. multiple decoding device fz
2 input/output + [h connected to child 1.

The second camera 6 is equipped with a jllll mover 17, and the imaging direction is controlled by the camera control panel 14 via the switch 32, so that the faces of each attendee seated at the individual conference desks 16 are captured ( It is.

Problems to be Solved by the Invention However, in the configuration described above, the imaging direction of the second camera that images the speaker's face etc. is determined by one of the attendees operating the Tohen camera control panel. There was a drawback that had to be done.

In view of the above, the present invention is a conference table y
cDetect the speaker's voice strength from each installed microphone,
By supplying a signal to the driver of the camera installation 7T so that the camera moves in the direction of higher intensity depending on the degree of detection, imaging can be achieved without operating the camera sterilization panel and with a simple configuration. The purpose is to provide a control device.

Means for Solving the Problems In order to achieve the above object, the present invention includes detection means for detecting the peak value (volume) of the audio signal of each microphone, and retains the peak value detected by each of the detection means for a certain period of time. a holding means, a determining means for determining a microphone position having the highest peak value from each signal held by the holding means, and a camera imaging direction directed toward a microphone position according to a determination result of the determining means. a step-like drive control means for controlling;
The imaging control device includes a camera operated by the control means.

Effect of the present invention With the above-described configuration, when the determination circuit detects the microphone position with the highest level of the peak value from each signal that detects and holds the peak value (volume) of the audio signal of each microphone, based on the detection result, A step-like motion control signal generator operates to generate a step-like small motion control signal according to the detected microphone position to control the direction of the camera.

Embodiment FIG. 1 is a block diagram showing an embodiment of the camera loading system of the present invention. FIG. 2 is a timing chart for explaining the operation of the embodiment 9+1.

In FIG. 1, 18 is a first peak value detector, 19 is a second peak value detector, 20 is a third peak value detector, 21 is a fourth peak value detector, 22 is a fifth peak value detector, 23
is a first cage, 24 is a second cage, 25 is a third cage,
26 is a fourth retainer, 27't"i is a fifth retainer, 28 is a determiner, 29 is a step-like drive ffji control signal generator,
30 is a control C1] signal output terminal.

In FIG. 2, B detects the peak value of the audio signal of the first microphone 9 by the first peak value detector 18, and the detected value is held as the output waveform of the first holder 23 for a certain period of time, b(・The second peak value detector 19 detects the peak value of the audio signal of the second microphone 1o, and the output waveform of the second holder 24 holds the detected value for a certain period of time, and C represents the audio of the fifth microphone 13. The peak value of the signal is detected by the sixth peak value detector 22, and the detected value is held for a certain period of time. The output waveform of the sixth holder 27, d is the third microphone 1.
The output waveform of the third holder 25 whose detected value is held for a certain period of time is the output waveform of the audio signal of the fourth microphone 12 detected by the fourth peak value detector 21. The output waveform of the fourth holder 26 which detects the peak value and holds the detected value for a certain period of time, fi1
This is a step-like output waveform of the drive control signal generator 29.

Next, the operation of this embodiment will be explained.

First, the first microphone 9, the second microphone 10. 3rd microphone 11
, the fourth microphone 12, and the fifth microphone 13 are inputted to the audio sterilization unit (ACU) 4 shown in FIG. Then, the output of the second microphone 10 is sent to the second peak value detector 19, and the output of the third marker 11 is sent to the third peak value detector 20).The output of the fourth microphone 12 is sent to the fourth peak value detector 20). Next, the output of the fifth microphone 13 is inputted to a fifth peak value detection type 22, respectively.

When the voice of the speaker is input to the first microphone 9, the audio signal shown by the dotted line in B in FIG. 2 is input to the first peak value detector 18. The first peak value detector 18 detects the peak value, and its output is input to the first holder 23 and held for a certain period of time. A signal a shown by a solid line is obtained as the output of the first holder 23.

The reason for holding this for a certain period of time is that if each speaker speaks in a short period of time, if the camera follows quickly,
This is to provide a slight time response and make it easier to view, as it would be very difficult to see on a TV screen. The same applies to the processing for the second to fifth microphones.

The first cage 23 and second cage 24 obtained as above
, the outputs of the third holder 25, the fourth holder 26, and the fifth holder 27 are input to the determiner 28.

The determiner 28 determines the maximum peak value input from each of the input signals a to 6, and outputs a signal indicating the microphone position corresponding to the maximum peak value input. The output of the determiner 28 is input to a steering knob-like drive control signal generator 29. Stepped, driven! ! jl 61 signal generator 29 generates a step-like linkage control signal f whose direction of the camera is determined in advance by the control signal level.

Maximum peak value a at the first microphone 9 to the sixth microphone 13
% 8 is not detected, the output f of the step-shaped drive control signal generator 29 is at the base direction level,
The camera is always stopped in one direction.

When the maximum peak value a is detected at the first microphone 9, f
The output of the first microphone changes to the 9-direction level, and the camera
The driver moves it toward the conference desk where the first microphone 9 is placed.

Similarly, when the maximum peak value C of the sixth microphone 13 is detected, the output of f changes stepwise to the level in the direction of the sixth microphone 13, and the camera moves in the direction of the conference table where the sixth microphone 13 is placed. Moving.

The output of the step drive control signal generator 29 is input to the output terminal 3Q. The output terminal 30 is connected to an input terminal 31 shown in FIG. Therefore, the output signal of the stepped drive control signal generator 29 is transmitted to the output terminal 30. The signal is supplied to the driver 17 via the input terminal 31 and the switch 32.

The changeover device 32 is a changeover switch that performs changeover between automatic JIb control and manual control according to the configuration shown in FIG.

As described in detail, according to the present invention, the sound intensity from each microphone installed on a conference table is detected, and the camera control panel is activated to automatically move the camera in the direction of higher intensity. There is no need to operate the system in the direction of the user each time, and it can be realized with a simple configuration, so it has great practical effects.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an imaging control device in an embodiment of the present invention, FIG. 2 is a timing chart for explaining the operation of the embodiment, and FIG. 3 is an example of an electronic conference system. Refer to the block diagram. 1... Input terminal, 2... D-MUM, 3...
...VCU, 4...ACU, 5...1st camera, 6-2nd camera, 7-8...TV receiver F,
9”1Qa11 @12・13・・・Mic, 1
4...Camera ili! Control panel, 15...
Speaker, 16... Conference table, 17... Driver, 18, 19, 20-21, 22... Peak value detector, 23-24-25, 26, 27...・Cage,
28... Determiner, 29... Step drive control signal generator, 30... Output terminal, 31...
...Input terminal, 32...Switcher.・Name of agent: Patent attorney Toshio Nakao Haga 1 person No. 1 1ζ ÷ 3! ? ；Hoji Tomigō too

Claims (1)

[Claims] detection means for detecting the peak value of each volume of the plurality of microphones;
holding means for holding the detected peak value for a certain period of time; judgment means for judging the microphone position of the highest level of the peak value detected from each of the held signals; and a judgment means corresponding to the judgment result of the judgment means. An imaging control device comprising: control means for controlling an imaging direction of a camera to a microphone position.