JPH0564187A - Video conference terminal equipment - Google Patents

Abstract

PURPOSE:To apply write and correction or the like to a hand-written picture received from an opposite party, to set a received picture as a still picture and to send the reception picture after correction optionally. CONSTITUTION:Reception data from an opposite party are stored in a VRAM 10 via an A/D converter 9. A VRAM 10 synthesizes hand-written data from a hand-written input device 8 integrated with a monitor 7 and stored data and displays the synthesis picture onto the monitor 7 via a D/A converter 11. Furthermore, a switch 13 stops the storage of reception data to the VRAM 10 to make a reception picture to be a still picture. Furthermore, a transmission picture switching device 3 is used to send the synthesis picture data of the D/A converter 11 to an opposite party.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention connects conference terminals in a plurality of conference rooms located at distant points via a video conference control device for managing the entire conference, and conducts a video conference at a remote point by voice and image. The present invention relates to a video conference terminal device.

[0002]

2. Description of the Related Art A block diagram of a conventional video conference terminal device is shown in FIG. The conventional video conference terminal device photographs its own situation with the camera 4, switches the image of the camera 4 with the transmission image switching device 3, inputs it to the high-efficiency encoding device 1, displays it on the transmission image monitor 5, and communicates with it. It is sent to the other party via the line. Further, the received image from the other party is displayed on the received image monitor 6 via the communication line and the high efficiency encoding device 1.

Further, only the electronic blackboard 2 can be used as a handwriting input device. That is, the contents written on the electronic blackboard 2 as a handwriting input device are converted into data, input to the high-efficiency encoding device 1, transmitted to the other party by the low-speed communication function of the high-efficiency encoding device 1, and converted into a video signal. The image is displayed on the transmission image monitor 5. When the other party additionally writes or erases the content of the electronic blackboard 2, the content changed by the other party on the electronic whiteboard 2 is displayed on the screen of the transmission image monitor 5 of the other party as it is in real time.

[0004]

In the above-mentioned conventional video conference terminal device, mutual overwritten images on the electronic blackboard can only be obtained as means for exchanging information by handwriting input, and images received from the other party can be handwritten. I was unable to write, erase, or point to the image by input. In addition, the received image was stopped and could not be used as an image for transmission.

[0005]

SUMMARY OF THE INVENTION According to the present invention, conference terminals in a plurality of conference rooms located at distant points are connected via a video conference control device for managing the entire conference, and a video conference is performed at a remote point by voice and image. In the video conference terminal device that performs the above, an A / D converter that converts an image received from the other party into a digital signal, a VRAM that accumulates the converted digital signal and synthesizes the handwritten input data, and read from the VRAM. A D / A converter for converting the converted data into a video signal, a monitor for displaying an image of the converted video signal, and a handwriting input device integrated with the monitor for writing, erasing, and pointing on the monitor screen. It is equipped with. Also, A / D to VRAM
A switch for prohibiting accumulation of digital signals from the converter and switching a received image to a still image is provided. Further, a transmission image switching device for switching the video signal output from the D / A converter with the video signal from the camera to be a transmission image to the other party is provided.

[0006]

According to the present invention, the data from the handwriting input device integrated with the monitor is combined with the received data from the other party in the VRAM and displayed on the monitor. Further, by switching the switch, the accumulation of digital signals in the VRAM is prohibited, and the image received from the other party remains stationary on the monitor screen. Further, by switching the transmission image switching device, the reception image that has been written, modified, etc. on the monitor is transmitted to the other party.

[0007]

The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a video conference terminal device according to the present invention. In the figure, the user's own situation is photographed by the camera 4, the image of the camera 4 is switched by the transmission image switching device 3, input to the high-efficiency encoding device 1, displayed on the transmission image monitor 5, and transmitted to the other party via the communication line. Send to. Further, the received image from the other party is displayed on the received image monitor 6 via the communication line and the high efficiency encoding device 1.

As a handwriting input device, the contents written on the electronic blackboard 2 are converted into data and input to the high efficiency encoding device 1,
The low-rate communication function of the high-efficiency encoder 1 sends the video signal to the other party, converts it into a video signal and displays it on the transmission image monitor 5. When the other party additionally writes or erases the content of the electronic blackboard 2, the content changed by the other party on the electronic whiteboard 2 is displayed on the screen of the transmission image monitor 5 of the other party as it is in real time.

The image received from the other party is converted into a digital signal by the A / D converter 9 and written in the VRAM 10 under the control of the control circuit 12. The digital signal written in the VRAM 10 is read out under the control of the control circuit 12 and converted into a video signal by the D / A converter 11.
The converted video signal is input to the composite image monitor 7 and displayed. The control circuit 12 constantly writes and reads data in the VRAM 10, but stops writing when there is an input from the switch 13 and shifts to read-only control. As a result, the image received from the other party is displayed on the composite image monitor 7 as a still image.

The image information input from the handwriting input device 8 is combined with the digital signal stored in the VRAM 10 under the control of the control circuit 12, passes through the D / A converter 11, and the received image from the other party and the handwriting input. It is displayed on the composite image monitor 7 as a composite image of the images. The composite image monitor 7 and the handwriting input device 8 are integrated, and handwriting input such as writing, erasing, and pointing can be performed by directly overwriting on the screen. Furthermore, D /
The combined image data output from the A converter 11 is switched to the image data from the camera 4 by the transmission image switching device 3 and transmitted to the other party.

[0011]

As described above, according to the present invention, the monitor and the handwriting input device are integrated and the received image data and the handwritten input data are combined and displayed on the monitor. Can be written to, erased from, and pointed to. Also, VRA
Since the accumulation of the received image data in M is stopped by the switch, the received image from the other party can be stopped. Further, since the display data can be transmitted to the monitor, there is an effect that the received image which has been written and modified can be transmitted to the other party again. Further, the combined image can be used as a transmission image.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a video conference terminal device according to the present invention.

FIG. 2 is a block diagram of a conventional video conference terminal device.

[Explanation of symbols]

 2 electronic blackboard 3 transmission image switch 4 camera 7 composite image monitor 8 handwriting input device 9 A / D converter 10 VRAM 11 D / A converter 12 control circuit 13 switch

Claims (3)

[Claims] 1. A videoconference terminal device for connecting videoconference terminals in a plurality of conference rooms located at distant points via a videoconference control device for managing the entire conference and performing a videoconference at a remote point by voice and image, An A / D converter for converting an image received from the other party into a digital signal;
The VRAM for accumulating the digital signal converted by the D converter and synthesizing the handwritten input data, the D / A converter for converting the data read from the VRAM into a video signal, and the D / A converter A video conference terminal device comprising: a monitor for displaying an image of a converted video signal; and a handwriting input device integrated with the monitor for writing, erasing, and pointing on a monitor screen. 2. The video conference terminal device according to claim 1, further comprising a switch for prohibiting accumulation of a digital signal from the A / D converter in the VRAM and switching a received image to a still image. .. 3. A transmission image switching device for switching a video signal output from the D / A converter to a video signal from a camera to be a transmission image to the other party, and further comprising a transmission image switching device. Video conference terminal device.