论文部分内容阅读
一、前言为了实现多媒体业务不仅需要有终端系统，还需要有网络的积极参与。以往的多媒体业务，大多是利用终端系统即计算机处理能力的形式进行的，网络只限于所谓电话网及专用通信网提供的“金属线路”。即使在因特网的利用中，也是使分散设置的计算机集中起来收发信息，其网
First, the foreword In order to realize the multimedia business not only needs to have the terminal system, but also needs the active participation of the network. In the past, multimedia services were mostly implemented in the form of a terminal system, that is, a computer processing capability, and the network was limited to “metal lines” provided by so-called telephone networks and private communication networks. Even in the use of the Internet, distributed computers are also collected to send and receive information.