高误码率链路上多媒体通信的复接方案

针对高误码率链路上的多媒体通信,提出了一种高效率、高鲁棒性的复接方案。方案采用了双层的数据复接结构,结合了定长帧和变长帧复接方案的优点,在高误码率链路上提供了良好的同步特性。同时多种业务的数据流能灵活地进行复接,从而提高了整体的通信效率。该方案针对实时和非实时业务进行复接,有效降低了实时业务的通信时延。实验证明:与ITU-TH.223附录C中提出的方案相比,该方案在10-2随机误码的链路上,通信效率提高了17.3%。

Multiplexing Scheme for multimedia communications over error prone channels

An efficient, robust multiplex scheme was developed for multimedia communications over error prone channels. The advantages of fixed length multiplexing and variable multiplexing were combined into a double multiplexing structure. The scheme can effectively synchronize over error prone channels and flexibly multiplex multiple service bit streams to provide efficient communications. Bit streams can be multiplexed according to the difference between the real-time and non-real-time services to achieve low end to end delay in real-time communications. Tests show that the communication efficiency is improved by 17.3% on a channel with 10~-2 random errors, compared with the multiplex scheme proposed in Appendly C of the ITU-T H.223 protocol.