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FRD-FPRED: a novel re-decode based error compensation method using fast re-decoding and fast prediction algorithm

The study aims to find an efficient compensation method of transmission errors in low bit-rate mobile communications using the H.263 video codec. We suggest a novel error compensation method in the encoder (or transmitter), that can remove visual quality degradation due to spatio-temporal error propagation by utilizing a feedback channel. Our proposed method can reduce the computational complexity of the re-decoding method and FRD (fast re-decoding) method by using the characteristic for non-error-propagated macroblocks. Experimental results show that the proposed error compensation method can give higher coding efficiency compared with the other two non-re-decoding based methods: the reference picture selection (RPS) method and the error tracking (ET) method. Finally, our proposed method requires only 30% of the operations compared to the fast re-decoding (FRD) procedure.