固定码率

在这个系统级别视频转码方案中，最核心的内容是将固定码率（CBR）的视频码流转码成为可变码率（VBR）的视频码流，为此，我们提出了两种不同的方法。

The key point for this system level transcoding scheme is transcoding constant-bit-rate ( CBR ) video bitstream to variable-bit-rate ( VBR ) video bitstream . Two different solutions are addressed .

仿真结果显示，在误码率为10-5时，该系统与固定码率系统相比，在信息传输速率上有明显的优势。

The simulation shows that this system outperform fixed code rate system at information rate ( BER of 10-5 ) .

由于无线信道的统计特征随着时间和空间变化，现有的协作通信方案中大多采用的固定码率的编码方案并不适合无线系统。

The coding scheme of Constant Bit Rate ( CBR ) which is used in most of cooperative transmission project misfits wireless systems , because of the statistics of wireless channel has its temporal spatial variability .

数字视频压缩后通常是打包成传输流的形式进行传送，每个传输流都有其固定的发送码率。

Compressed digital video data is usually packed to transport stream ( TS ) which has its own bit rate .