However, the compressed video data is highly sensitivity to error code. A few error codes may induce much code be decoded invalidly.
而且压缩后的视频数据对码元错误非常敏感，少量码元的错误就可能导致大批码元无法正确解码。
Up to now, more and more video materials are stored and transmitted in the compression form, so it is practical to study the shot segmentation algorithms based on compressed video data.
从实用角度看，目前越来越多的动态视频资料都是以压缩形式存储和传输，所以，研究基于压缩视频流的算法更有实际意义。
Original video data must be compressed for transmission in wireless network because of its high bandwidth.
由于原始视频信号数据量巨大，必须经过压缩才能在无线网络中传输。
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