WitsenhausenWyner Video Coding
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Inspired by Witsenhausen and Wyner's 1980 (now expired) patent on interframe coder for video signals, this paper presents a Witsenhausen-Wyner video codec, where the motion-compensated previously decoded video frame is used at the decoder as side information for joint decoding. Specifically, we replace predictive Inter coding in H.264/AVC by the syndrome-based coding scheme of Witsenhausen and Wyner, while keeping the Intra and Skip modes of H.264/AVC unchanged. We employ forward motion estimation at the encoder and send the motion vectors to help generate side information at the decoder, since our focus is not on low-complexity encoding. We also examine the tradeoff between the motion vector resolution and coding efficiency. Within the Witsenhausen-Wyner coding mode, we optimize the decision between syndrome coding and entropy coding among different discrete cosine transform (DCT) bands and among different bit-planes within each DCT coefficient. Extensive simulations of video transmission over wireless networks show that Witsenhausen-Wyner video coding is more robust against channel errors than H.264/AVC. The price paid for enhanced error-resilience with Witsenhausen-Wyner coding is a small loss in compression efficiency. 2011 IEEE.
IEEE Transactions on Circuits and Systems for Video Technology
author list (cited authors)
Mei Guo, .., Zixiang Xiong, .., Feng Wu, .., Debin Zhao, .., Xiangyang Ji, .., & Wen Gao.
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