| This thesis researches the relative standards of digital TV system such as video capture, data code and multimedia real-time transport protocol. On these researches the thesis designs a new multi-channel MPEG-2/4 codec server. The server has all functions of orthodox MPEG-2 Encoder; furthermore, more functions are extended, including MPEG-2 decoder, MPEG-4 codec, and RTP transport. With all above, data stream can be transmitted not only through TV network but also via internet. The server supports both encoder and decoder works at the same time, which makes stream conversion come to truth. The software design of system based on Linux OS and the multi-channel design make the server can be control easier and has better capability to resume from error. Because of the module design of both hardware and software, the assignment of module is definite; the dependability and the ability of data processing of system are improved consumedly. Using the design also is helpful to make the system configuration agile. For example, consumers can choose how many sub-card of system in order to reduce their cost. The module design of software can also make farther design of software become easier, and develop periods become shorter. The multi-channel MPEG-2/4 Codec Server have been accomplished and reached the design requirement. And the digital broadcast front-end system is consummated. |
PDF Full Text Request