Overview of Error Concealment for Video Transmission
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摘要: 讨论了视频差错掩盖研究的发展过程和现状.介绍了常见的空域和时域差错掩盖算法,特别是基于边缘检测的空域自适应差错掩盖算法、基于运动向量外插的时域差错掩盖算法、多步多权值块变形差错掩盖算法以及基于失真度估计的SVC质量分级自适应差错掩盖算法.分析了这些算法在不同有损传输环境下的差错掩盖性能和适用环境.预测了差错掩盖技术可能的发展趋势.Abstract: The history and present situation of researches on video error concealment were discussed.Several representative spatial and temporal error concealment algorithms were presented with an emphasis on edge detection based adaptive spatial error concealment,motion vectors extrapolation based error concealment,multi-step multi-weighted block-warping error concealment,and distortion based adaptive SVC FGS error concealment.Their applicability and performances in different error-prone transmission environments were analyzed.The development trend of the video error concealment technologies was predicted.
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Key words:
- video coding /
- video transmission /
- error control /
- error concealment
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