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目前我国广播电视所使用的体系是建立在HFC基础上的,为了满足广大人民群众日益增长的精神文化需要,需要把原有的网络改造成双向可逆的系统构成。这是因为当前的网络只能够满足用户的基本信号需求,比如通过网络来接受视频或者音频信号,但是却无法满足日益发展的多媒体交互信号的要求,更不要说当前网络发展的主流,及用户媒体和网络之间的双向互动,所以基于EPON的广电数字双向网络改造就成为了当前十分重要的任务。
At present, the system used in China’s radio and television is based on HFC. In order to meet the growing spiritual and cultural needs of the general public, it is necessary to transform the existing network into a bidirectional and reversible system. This is because the current network can only meet the basic signal needs of users, such as receiving video or audio signals through the network, but can not meet the requirements of the ever-increasing multimedia interaction signal, not to mention the current mainstream of network development and user media And the network between the two-way interaction, so based on EPON radio and television digital two-way network transformation has become the very important task.