视频转码器可以满足上述需求，将一种压缩格式的视频码流转换为另一种压缩格式，如不同码率、不同分辨率、不同语法格式等。
A video transcoder is a device that converts video from one compressed format into another compressed format with different bitrate, resolution or syntax.
运动矢量修正技术：码率调整型转码算法可以屏蔽网络的异构性，但导致参考帧数据发生变化，需要重新进行运动估计。
Motion Vector Refinement: Bit rate adaptation transcoding adapt the network heterogeneity, which makes the reference frame changed. The motion estimation is needed.
介绍一种基于MPEG 2的变码率到定码率的视频转码压缩系统。
A system based on MPEG-2, which implements the transcoding and compression from VBR to CBR, is discussed.
介绍一种基于MPEG 2的变码率到定码率的视频转码压缩系统。采用软件实现，极大地降低了成本。
A system based on MPEG-2, which implements the transcoding and compression from VBR to CBR, is discussed. Because of the use of software, the cost is reduced remarkably.
介绍一种基于MPEG 2的变码率到定码率的视频转码压缩系统。采用软件实现，极大地降低了成本。
A system based on MPEG-2, which implements the transcoding and compression from VBR to CBR, is discussed. Because of the use of software, the cost is reduced remarkably.
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