JPH05130600A - Television conference device - Google Patents

Abstract

PURPOSE:To accurately adjust the position of a camera by correcting a shift in stop position which is caused when a stop signal for camera operation is sent from an operation part. CONSTITUTION:A delay measuring circuit 72 measures and stores the time from the input of a camera operation start signal from the operation part 9 to the return of a response signal indicating the start of the actual operation of a camera 1. A correction signal circuit 73 when inputting the camera operation stop signal from the operation part 9 reads the delay time out of the delay measuring circuit 72 and calculates the movement quantity of the camera, and adds a correction signal for the delay to the camera operation stop signal and outputs them. An operation detecting circuit 32 detects the point of time when the camera 1 begins to be put in adjusting operation and sends the response signal back to the side of the delay measuring circuit 72. A correcting circuit 33 receives the correction signal and adds a correction indication to a control signal 101 to be sent to a camera operation part 2, thereby correcting the stop position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video conference device,
In particular, the present invention relates to a video conference device having a remote control function for a TV camera.

[0002]

2. Description of the Related Art Conventionally, this type of video conference apparatus has been shown in FIG.
It has the configuration shown in. In one of the conference rooms, a camera 21, a camera operating unit 22 that adjusts the direction of the camera, a first control unit 23 that controls the camera operating unit 22, and a first control unit 23. A first communication processing unit 24 for mutually transmitting a control signal to the other conference room and a video signal from the camera 21 is installed.

In the other conference room connected by the transmission line 25, an operating section 29 for operating the camera 21, a display section 28 for displaying an image from the camera 21, and an operating section 2
A second control unit 27 that controls the display unit 28 by an output signal from the control unit 9 and outputs a control signal to the first control unit 23.
And a second communication processing unit 26 and the like facing the first communication processing unit 24 for mutually transmitting a control signal and a video signal to one of the conference rooms.

The adjustment operation of the camera 21 is up, down, left and right,
Adjustments such as zooming and focusing are possible, and these adjustments are performed by operating the operation unit 29 while watching the image on the display unit 28 from the conference room where the display unit 28 is located.

[0005]

As described above, in the conventional example, the camera is adjusted by operating the operation section while watching the image on the display section.
That is, the transmission delay until the control signal operates the camera,
In addition, there is a problem that the operation unit deviates from the position instructed to stop the operation of the camera due to a delay in encoding the video image.

[0006]

According to the video conference apparatus of the present invention, the camera is controlled by the operation start signal from the transmission of the operation start signal for instructing the start of the adjustment operation of the direction of the camera installed in the other conference room. A delay time until the adjustment operation is started is measured in advance, and when the operation stop signal for instructing the stop of the adjustment operation of the camera is transmitted, a correction signal for notifying the movement amount of the camera due to the delay time is used as the operation stop signal. In addition, a camera control system is provided for stopping the adjustment operation of the camera and correcting the stop position by the correction signal.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of this embodiment. In one of the conference rooms, a camera 1 for photographing, a camera operating unit 2 that adjusts the direction of the camera 1 and the like, a first control unit 3 that controls and corrects the camera operating unit 2, The control signal to the first controller 3 and the camera 1
A first communication processing unit 4 for mutually transmitting a video signal from the other and the other conference room is installed.

In the other conference room connected by the transmission line 5,
An operation unit 9 for operating the adjustment operation of the camera 1, a display unit 8 for displaying an image of the camera 1, and an output signal from the operation unit 9 to control the display unit 8 and to the first control unit 3. A second controller 7 that outputs a control signal and a correction signal;
The second communication processing unit 6 opposite to the communication processing unit 3 is installed.

Next, the operation will be described. Of the output signals 104 output by the operation of the control unit 9, the signal instructing the adjustment operation of the camera 1 is transmitted as the control signal 101 for controlling the camera operation unit by the route shown. or,
The video signal 102 of the camera 1 is transmitted as the video signal 103 to the operation unit 8 through the route shown. That is, the adjustment operation of the camera 1 can be performed in the up / down / left / right directions, zoom, focus, and the like, but this adjustment is performed by operating the operation unit 9 while watching the image on the display unit 8 from the conference room having the display unit 8. It is like this. FIG. 2 is a layout diagram showing the transmission format of the control signal at this time.

In the second control section 7, the control circuit 71 has the same function as the control section of the conventional example, and the delay measuring circuit 72 is provided.
When the control circuit 71 inputs a camera operation start signal for instructing a camera adjustment operation among the output signals from the operation unit 9, is a response notifying that the camera 1 actually started operation from the time of input of this signal. The time until the signal is returned is measured and this delay time is stored. Correction signal circuit 73
When the control circuit 71 inputs a camera operation stop signal from the operation unit 9, the delay time stored in the delay measuring circuit 72 is read to calculate the movement amount of the camera, and the correction signal is calculated as shown in FIG. It is added to the camera operation stop signal and output.

In the first control section 3, the control circuit 31 has the same function as the control section of the conventional example, and the operation detection circuit 32.
Detects the time when the camera 1 starts the adjustment operation due to the arrival of the camera operation start signal from the operation section from the control signal 101 or the like to the camera operation section 2 and returns this to the delay measurement circuit 72 side as a response signal. . When the camera operation stop signal and the correction signal arrive, the correction circuit 33 receives the correction signal, adds a correction instruction to the control signal 101 to the camera operation unit 2, and corrects the stop position.

[0012]

As described above, according to the present invention, when the camera operation stop signal is issued from the operation unit, the shift of the stop position caused by the signal transmission delay or the like is corrected by the correction signal. Therefore, there is an effect that the position of the camera can be accurately adjusted and the operability is improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an example.

FIG. 2 is a layout diagram showing a transmission format of a control signal according to an embodiment.

FIG. 3 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

 1 Camera 2 Camera Operating Unit 3 First Control Unit 4 First Communication Processing Unit 5 Transmission Line 6 Second Communication Processing Unit 7 Second Control Unit 8 Display Unit 9 Operation Unit

Claims (2)

[Claims] 1. A delay time from the transmission of an operation start signal for instructing the start of an adjustment operation such as the direction of a camera installed in the other conference room to the start of the adjustment operation of the camera by the operation start signal is measured in advance. In addition, a correction signal for notifying the amount of movement of the camera due to the delay time is added to the operation stop signal when the operation stop signal for instructing the stop of the adjustment operation of the camera is transmitted, and the adjustment operation of the camera is stopped. A video conference apparatus comprising a camera control system for correcting a stop position according to the correction signal. 2. A camera for photographing installed in one of the conference rooms, a camera operation section for adjusting the direction of the camera, a first control section for controlling the camera operation section, and a first control section for controlling the camera operation section. A first communication processing unit for mutually transmitting a control signal to one control unit, a video signal from the camera, and the like to the other conference room; and the camera installed in the other conference room. Control unit for operating the adjustment operation of the camera, a display unit for displaying an image of the camera, an output signal from the operation unit for controlling the display unit, and outputting the control signal to the first control unit. A video conferencing device including a second control unit for controlling the control signal and the video signal, and a second communication processing unit facing the first communication processing unit for mutually transmitting the control signal and the video signal, The control unit 2 has an output signal from the operation unit. Of these, when the camera operation start signal for instructing the start of the adjustment operation of the camera is input, the time from this input to the input of the response signal notifying that the camera has started operation is measured, and this delay time is stored. A means for adding a correction signal for notifying a movement amount of the camera calculated from the delay time to the camera operation stop signal when outputting a camera operation stop signal for instructing a stop of the adjustment operation from the operation unit, and outputting the correction signal, The first control unit detects a time point when the camera starts the adjustment operation by the input of the camera operation start signal, outputs the response signal to the second control unit side, and outputs the camera operation stop signal and the correction signal. And a means for stopping the adjustment operation of the camera and instructing the camera operation section to correct the stop position when a signal is input. Bi-conference equipment.