4 tide that video conference system develops

System of conference of video of type of each other of much hand over item by item is by with all possible means the user is participated in, conference process uses the business on the net of the multimedia information such as sound, image, character, data, have the system of the characteristic of real time sex and alternant sex. Regard group of group calculative as a fundamental application, system of conference of video of seesaw pattern much dot got the further support of group of new group communication technologies, for example: Idealer sow a road to be discussed by algorithmic chime more, the resource obligate that can get used to intricate network environment and information filter technology, reliable, orderly communication safeguard.

Basic composition of the system

Current, system of conference of video of type of each other of much hand over item by item is main control unit by terminal unit, much dot (communication network comprises MCU) and the number that include to transmit agency inside.

1. Terminal unit

System of conference of video of type of each other of much hand over item by item

Terminal unit includes video to input output equipment, frequency to input output equipment, video to make up decoder, frequency decoder and answer with / cent receives equipment to wait. It can be terminal of conference of video of type of each other of appropriative much hand over item by item, also can be the common computer that installed hardware of certain frequency, video and software, it is the phone even. Current, those who have special assembly room is large and medium-sized conference system uses appropriative conference terminal commonly, it can self-reacting network bandwidth and flow condition, can offer good QoS to assure a mechanism, provide first-rate video and frequency result, and interface intuitionistic, operation is simple. Now, the international video firm such as Polycom, VCON, VTEL, Tanderberg and China for, the domestic manufacturer such as resurgence has product of corresponding video conference terminal.

2. Many bits of control is unit (MCU)

Nod what bit righter video conference system does not need MCU to intervene, and many bits of conference needs to pass MCU ability to come true. MCU controls a center as the conference, can make the terminal connection of 3 above complete, the conference that participates in by much person, in the meantime, it can synthesize the speech that comes from many conferences terminal, video and data for a many group setting of seesaw pattern conference. Commonly used now MCU product comes from the international such as RADVISION, Polycom normally manufacturer and China for, the vessel is inspected wait for domestic manufacturer. The use of MCU is very simple also, support workstation management way already, have systematic configuration and government to MCU by systematic manager; Also support Web management way, can have the control of the conference and government to MCU by terminal user.
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