随着信息化社会的到来,信息的形式将是多种多样,话音、数据、文本、图像、电视是当今人们普遍易于接受的信息形式,如何将这些不同的信息形式综合集成一个统一的传播媒体中,或是通过一个多媒体网络来传送,使任何一个在网络中的用户终端能够同时分享多种形式的信息,而不需通过分散的,独立的诸如公共电话网PSTN、分组交换网China With the advent of an information society, the forms of information will be varied. Speech, data, text, images, and television are generally accepted forms of information in today’s society. How to integrate these different forms of information into a single unified media Or through a multimedia network so that any one of the user terminals in the network can simultaneously share various forms of information without having to go through decentralized and independent networks such as the public switched telephone network PSTN,