JPH0638203A - Opposite camera control system - Google Patents

Abstract

PURPOSE:To correct a deviation in an image pickup point of a camera of a called station by correcting automatically a delay time caused by a time from the operation of a camera operation panel of its own station till a universal head of the called station is moved and a time till a video image of the opposite camera is displayed on a monitor of its own station. CONSTITUTION:The system is provided with a camera control panel 4A(4B) to designate the image pickup position of a camera 2A(2B), a camera controller 5A(5B) which measures a transmission delay time till the controller 5A(5B) receives a camera control signal from the camera control panel 4A(4B) and controls a camera 2B(2A) of an opposite station and receives a camera control signal from a called party to control the camera, a transmitter 6A(6B) which multiplexes a video/audio signal of its own station and the camera control signal, outputs the multiplexed signal to a satellite line 7, and demultiplexes the video/audio signal and the camera control signal from a received signal through the satellite line 7, and a camera system having a universal head 3A(3B), the camera 2A(2B) and a monitor 1A(1B).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a partner camera control system in a remote video conference system using a satellite line.

[0002]

2. Description of the Related Art A conventional counterpart camera control system of this type multiplexes a camera control panel for controlling a camera and a camera control signal from the camera control panel with time-base video / audio signals and outputs them to a satellite line. At the same time, it is composed of a transmission device for separating the video / audio signal of the partner station and the camera control signal from the reception signal of the satellite line, and a camera system including a platform, a camera, and a monitor.

To control the camera position of the other station, operate the camera control panel while watching the received image on the monitor of the own station,
In response to this, information on the focal point and the photographing position is used as a camera control signal by the transmission device of the own station to be multiplexed with the video / audio signal of the own station and transmitted to the other station via the satellite line. At the other station, the received signal from the satellite line is displayed on the transmission device.
The audio signal and the camera control signal are separated, and the shooting point and focus of the camera are adjusted according to the camera control signal.

[0004]

In this conventional partner camera control system, since the camera control panel is operated while watching the partner's image on the own station monitor, the delay time required for the processing of the satellite line and the transmission device may occur. Even if the operation is stopped at the desired shooting point or focus, the movement continues for the transmission delay time, and it is difficult for the operator to exactly match the desired position. In particular, zoom photography and focus adjustment require fairly advanced adjustment skill.

[0005]

A partner camera control system of the present invention is a partner camera control system in a remote video conference system using a satellite line, in which the partner camera is controlled after the camera is controlled to a desired position. Measure the time until the camera of the station is controlled and the time until the image of the other station is displayed on the monitor of the own station, and according to the measurement result, shift the shooting point of the camera of the other station. The control means for correcting is provided.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a sequence diagram for explaining the operation thereof. First, at the start of communication, data communication is performed between the camera control device 5A of the time station and the camera control device 5B of the partner station via the transmission devices 6A and 6B and the satellite line 7. During this data communication, a predetermined command a is issued from the camera controller 5A of the time station to the camera controller 5B of the partner station.
Then, the camera control device 5A of the own station measures the response time t at which the response b returns from the camera control device 5B of the partner station in response to the command a. The response time t is obtained by dividing the time required for transmitting the command a and returning the response b into two equal parts. Based on the measurement result of the response time t, the transmission device 6 previously set in the camera control device 5A of the own station as a system parameter.
The processing delay time c in A is added, and the addition result is stored in the camera control device 5A of the own station as the addition delay time d. Further, the camera control device 5B of the partner station also performs the same processing and stores it as the addition delay time d.

After that, in order to control the photographing position of the camera 2B of the partner station, the camera operation panel 4A is operated while watching the image on the monitor 1A of the own station, and the camera operation panel 4 is operated accordingly.
By the camera control signal e output from A, the camera 2B
Remotely control the focus and shooting position of. However, the image on the monitor 1A of the own station is actually delayed by the addition delay time d from the image i when operating the camera operation panel 4A. Therefore, even if the operation of the camera control panel 4A is stopped at the position desired by the operator, the pan head 3B does not stop at the image g when the camera operation ends, but continues to move for the addition delay time d. After that, the image h when the platform 3B stands still is actually the monitor 1 of the own station.
It is projected on A. Therefore, first, the camera control device 5
The correction control signal f is output from the camera control device 5A of the own station to the other camera control device 5B so that the camera control panel 4A is moved in the opposite direction by the addition delay time d stored in A. To do.

The timing of outputting the correction control signal f is
The output is started from the time when the key operation of the camera operation panel 4A is stopped, and is output for the addition delay time d. By the above operations and operations, it is possible to set the photographing point of the TV camera 2B of the partner station to the position desired to be viewed by the own station.

[0010]

As described above, according to the present invention, the time from the operation of the camera operation panel to the control of the camera of the partner station and the time when the image of the partner station is displayed on the monitor of the own station. By automatically calculating and correcting the time and the time with the camera control device, the shooting point of the camera can be adjusted realistically while watching the image on the monitor, and zoom shooting and focusing that are difficult to adjust can be easily performed. You can

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a sequence diagram showing a communication procedure in the embodiment of the present invention.

[Explanation of symbols]

 1A, 1B monitor 2A, 2B camera 3A, 3B pan head 4A, 4B camera operation panel 5A, 5B camera control device 6A, 6B transmission device 7 satellite line 8 satellite

Claims (2)

[Claims] 1. The time from the camera control until the camera of the partner station is controlled during the operation of adjusting the photographing point of the camera of the partner station to a desired position in the remote video conference system using the satellite line, and the partner. It is characterized by comprising control means for measuring the time until the video of the station is displayed on the monitor of the local station and correcting the deviation of the photographing point of the camera of the partner station according to the measurement result. Opponent camera control system. 2. The control means transmits from a camera operation panel for designating a photographing position of the camera and a camera control signal from the camera operation panel until the camera of the partner station controls. It has a camera control device that controls the camera of the own station by receiving the camera control signal from the partner station while measuring the delay time, and multiplexes the video / audio signal of the own station and the camera control signal. A transmission device for separating the video / audio signal and the camera control signal of the partner station from the reception signal from the satellite line while outputting to the satellite line, and a camera system having a pan head, a camera, and a monitor, The partner camera control system according to claim 1, wherein both the own station and the partner station can control each other.