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Residual Motion Coding Method for Error Resilient Transcoding System

机译:误差弹性代码转换系统的残差编码方法

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摘要

For video adaptation in universal multimedia access systems, video contents have to be transcoded according to the requirements of network bandwidth and the performance of clients. However, the transcoded video streams are vulnerable to channel disturbances when they are transmitted over the wireless channels. In this paper, we present an error resilient transcoding system using the residual motion coding method for wireless visual communications networks. The residual motion coding method interleaves into the bitstream the residual motion vector that is auxiliary motion information to be used at the decoder to recover the lost motion vector. With the residual motion vector, the decoder can precisely reproduce the motion vector of the corrupted macroblock and reconstruct the lost macroblock by using error concealment based on temporal prediction. Experimental results show that the proposed method can not only achieve the error robustness of the motion vector, but also improve the performance of error concealment at the decoder.
机译:为了在通用多媒体访问系统中进行视频适配,必须根据网络带宽和客户端性能的要求对视频内容进行转码。但是,经过转码的视频流在无线信道上传输时,很容易受到信道干扰。在本文中,我们提出了一种使用残差运动编码方法的无线视频通信网络的容错转码系统。残余运动编码方法将作为辅助运动信息的残余运动矢量交织到比特流中,以在解码器处使用以恢复丢失的运动矢量。利用残余运动矢量,解码器可以通过使用基于时间预测的错误隐藏来精确地再现损坏的宏块的运动矢量并重建丢失的宏块。实验结果表明,该方法不仅可以实现运动矢量的鲁棒性,而且可以提高解码器的错误隐藏性能。

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