JPH08163149A - Picture communication congress system - Google Patents

Abstract

PURPOSE: To transmit the data with high efficiency and at a high speed among the picture communication devices installed at many sports. CONSTITUTION: The picture communication devices 11 and 12-1 to 12-3 having >=2 speech channels and three-party talking circuits are connected together in a chain by a single taking link via a two-way communication network. When no transmission data are available, each picture communication device fetches the reception data and transfers them directly to another picture communication device. When the transmission data are available, the picture communication device fetches the reception data and also sends the transmission data to another picture communication device. then the fetched reception data are transferred to another picture communication device after the transmission data are transferred.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image communication conference system for transmitting image data and other control data between image communication devices at multiple points.

[0002]

2. Description of the Related Art A conventional image communication conference system is shown in FIG. In this image communication conference system, the image communication device 1 of the member acting as the conference host and the image communication devices 2 and 3 of the other members are connected to each other,
Image communication device 1 → image communication device 2 → image communication device 3 → image communication device 1 transmits image data and control data in one direction to hold an image communication conference.

[0003]

However, in the conventional image communication conference system shown in FIG. 3, for example,
When the image communication device 2 cannot directly transmit data to the image communication device 1 and the image communication device 2 transmits its own data, the immediately preceding image communication device 1 has not completed the data transmission. In that case, there is a problem that it takes time to transmit data because the data transmission cannot be started. Such a problem becomes more serious as the number of members increases.

The present invention has been made in view of such conventional problems, and an object thereof is to provide an image communication conference system capable of efficiently transmitting data between image communication devices at multiple points in a short time. And

[0005]

In order to achieve the above object, the present invention provides a communication network capable of bidirectionally communicating a plurality of image communication devices each having two or more communication channels and a three-way communication circuit. If there is no transmission data in each image communication device, the received data is taken in, and the received data is transferred to another image communication device as it is. When there is, the reception data is captured, the transmission data is transmitted to another image communication device, and after the transmission of the transmission data is completed, the captured reception data is transferred to another image communication device. To do.

[0006]

FIG. 1 shows an embodiment of the present invention. In this embodiment, the image communication device 11 of the member acting as the conference host and the image communication devices 12-1 and 12- of the other members.
2 and 12-3 are to hold an image communication conference between multiple points. Each image communication device is provided with two call channels and a three-way call circuit (not shown), and is connected in a chain with one call link via a communication network so that two-way communication can be performed. A selection circuit 14 for selecting the relay system is provided so that the relay system can be selected according to the reception / transmission of image data and other control data (hereinafter, simply referred to as data).

As shown in FIGS. 2A and 2B, the selection circuit 14 is provided with a reception buffer 15, a transmission buffer 16 and a changeover switch 17, the reception buffer 15 is connected to the receiving side of the speech channel, and the changeover switch 1 is connected.
The transmitter side of the communication channel is selectively connected via 7 to the receiver side of the communication channel and the transmission buffer 16. 2A and 2B show only one communication channel, the other communication channel can be similarly configured.

In this embodiment, when the data from another image communication apparatus is transferred to the next image communication apparatus, as shown in FIG. The reception data is transferred to the next image communication apparatus, and the received data is displayed on the image communication apparatus of its own via the reception buffer 15.

Further, in the case of transmitting data in its own image communication device, as shown in FIG. 2B, the transmitting side of the communication channel is connected to the transmitting buffer 16 via the changeover switch 17, whereby the self-transmitting buffer 16 is connected. Data is transmitted from the transmission buffer 16 to the call channel. Further, the data received during the transmission of this data is taken into the reception buffer 15 and displayed, and after the transmission of the received data is completed, the transmission side of the communication channel is switched by the switch 17. As shown in FIG. 2A, it is connected to the receiving end of the call channel and transferred to the next image communication device.

[0010]

As described above, according to the present invention, a plurality of image communication devices each having two or more call channels and a three-way call circuit are provided as a single image communication device via a communication network so as to enable bidirectional communication. Connected in a chain by a call link, each image communication device takes in the received data when there is no transmission data, transfers the received data as it is to another image communication device, and receives when there is transmission data Capture data,
Since the received reception data is transferred to another image communication apparatus after the transmission of the transmission data, the data can be simultaneously transmitted from a plurality of image communication apparatuses. Also,
Since two-way communication is possible, the own data can be transmitted in any direction. Therefore, data can be efficiently transmitted in a short time.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a configuration of a main part of FIG.

FIG. 3 is a diagram for explaining a conventional technique.

[Explanation of symbols]

 11, 12-1, 12-2, 12-3 Image communication device 14 Selection circuit 15 Reception buffer 16 Transmission buffer 17 Changeover switch

Claims (1)

[Claims] 1. A plurality of image communication devices each having two or more call channels and a three-way call circuit are connected in a chain by one call link via a communication network so that two-way communication is possible, and each image is connected. In the communication device, when there is no transmission data, the reception data is fetched, and the reception data is transferred to another image communication device as it is. When there is transmission data, the reception data is fetched and the transmission data is transferred to another image communication device. An image communication conference system, comprising: transmitting to an image communication apparatus, and, after the transmission of the transmission data is completed, transferring the received reception data to another image communication apparatus.