实时码流统计复用策略的探讨

An investigation on statistical multiplexing strategy for real-time stream

结合传统复用调度算法和基于权重的流媒体复用调度思想,提出一种适用于CBR和VBR的实时码流三级统计复用策略.在码流权重和丢包率分析的基础上,探讨了三级统计复用的总体性能.理论推导和仿真结果表明,这种统计复用策略能够在对数据损伤较小的前提下,提高传输流的有效码率,从而更有利于提高信道利用率.

Two traditional scheduling algorithms for multiplexer and weight - based multiplying idea for stream media are combined in this paper, and a third -level statistical multiplying strategy is proposed that is suitable for CBR and VBR real - time stream. Basing on analyzing the weight of stream and loss rate, the whole performance of third - level statistical multiplying strategy is discussed. The theoretical inference and simulating result indicate that this kind of statistical multiplying strategy can improve the valid code rate of transport stream under the condition of doing less harm to data, thus it is more advantageous in raising channel utilization.