Construction Of Broad Band Video Phone Operation System

As early as 1960s', people started to talk about the telephone that could be seen, but for a long time (from 1970 to 1990), the ability of the micro-electronics and the technology of the coding restricted the video technology development and popularization. Came into 90s', along with the micro-electronics technique advance rapidly, the development multimedia communicate technique and the achievements of video sign fountain coding standardization, the video communication operation could be implicated in business circumstance cosmically.Collectivity, video communication operation can be separated into two kinds: the first kind is colloquy and meeting kind operation, it includes the point-to-point video phone and the video meeting. These are alternation communications among people, and even a short time delay in the system can be apperceived by the user immediately, thus, this video communication operation demands high real time character; the other kind is search kind operation. For example, video on demand is the alternate communications between person and computer;it can be implemented by stream media technique, and demanded real time character lower than the first kind. Strictly speaking, this kind operation was not the real time operation.The public video communication network can satisfy the requirement of the external video communication. The operation module is: video communications Operation Company constructed and maintained the video communication network,...