Residual Motion Coding Method for Error Resilient Transcoding System
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.
KeywordsTranscoding Error resilience Error Concealment Residual motion coding
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- 1.Vetro, A. (ed.): MPEG-21 requirements for for digital item adaptation. ISO/IEC JTC1/SC29/WG1 N4684, Korea (2002)Google Scholar
- 4.ITU-T Recommendation H.263, Video coding for low bit rate communication (1998) Google Scholar
- 7.Wang, Y.K., Hannuksela, M.M., Varsa, V., Hourunranta, A., Gabbouj, M.: The error concealment feature in the H.26L test model. In: IEEE International Conf. Image Processing, vol. 2, pp. 729–732 (2002)Google Scholar
- 8.Lee, J.S., Lee, Y.A., Park, W.S., Ko, S.J.: A burst error concealment technique for visual communications in a mobile environment. In: Proc. IEEE Int. Conf. Consumer Electronics, Los Angeles, CA, pp. 18–19 (2003)Google Scholar
- 9.Draft ITU-T Recommendation H.264 and Draft ISO/IEC 14496-10 AVC. In: Wieg, T. (ed.) Joint Video Team of ISO/IEC JTC1/SC29/WG11 & ITU-T SG16/Q.6 Doc. JVT-G050, Pattaya, Thailand (2003)Google Scholar
- 10.Signal Processing and Multimedia Lab., Univ. British Columbia. TMN-10 (H.263+) Codec. (1998) Google Scholar