Based upon the conditions described above, we have designed a video codec system using DSP which can encode and decode H. 263 or MPEG-2 video stream.

基于以上情况，我们开发了一套基于DSP实现的视频编解码器，它能按照H . 263协议或MPEG - 2协议进行编解码。

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The key technology of a IPTV system includes audio and video encode, QoS of audio and video transfers over IP network and digital right management system.

经分析，要构建一个网络数字电视系统，其关键技术主要集中在音视频信号数字化编码、音视频信号在IP网络有质量的传输、数字版权管理系统等方面。

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