Precise and fast error tracking for error-resilient transmission of H.263 video

Pao Chi Chang, Tien Hsu Lee

研究成果: 雜誌貢獻期刊論文同行評審

29 引文 斯高帕斯(Scopus)


In this letter, a precise error-tracking scheme for robust transmission of real-time H.263 video is presented. By utilizing a feedback channel, the decoder reports the addresses of corrupted blocks induced by transmission errors back to the encoder. With these negative acknowledgments, the encoder can precisely calculate and track the propagated errors by examining the backward motion dependency for each pixel in the current encoding frame. With this precise tracking, the error-propagation effects can be terminated completely by INTRA refreshing the affected macroblocks. In addition, by utilizing the four-corner tracking approximation and the linear motion model, a fast algorithm is also developed to further reduce the computation and memory requirements. The simulations show that both schemes yield significant video quality improvements in error-prone environments. The advantages of the low memory requirement and the low computation complexity are particularly suitable for real-time implementation.

頁(從 - 到)600-607
期刊IEEE Transactions on Circuits and Systems for Video Technology
出版狀態已出版 - 2000


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