The algorithm study is in detail that one channel of video-stream is recompressed by mpeg-2 standard so that its bit-rate will be changed lower . then, multi-date streams will be processed by the technology of statistical remultiplex . the dynamic signals of every single data-stream " output can drive the values of bit-rate of the corresponding single data-stream 本次算法研究具体地说就是按照mpeg-2的标准对单路mpeg-2视频流再次压缩,将其码率变的更低,并且提出对多路码流进行统计复用,根据单路码流的输出动态信息对码流进行动态的调整的框架。
This thesis is going to give a detailed introduction on the mpeg2 transrating system . the system analyzes the mpeg2 transport stream first, extracts the elementary stream from it, recompress the elementary stream using the close loop transrating algorithm, and packets the recompressed elementary stream to construct the output transport stream at the end 该系统可以对mpeg2系统层传输流进行分析,从中提取出压缩层的视频基本流,并使用闭环降码率算法对其进行重新压缩,然后将经过降码率处理后的视频基本码流重新打包,生成系统层传输流发送。