Title :
Ordered statistics decoding of linear block codes for robust H.263 video transmission in AWGN channel
Author :
Chen, Wu-Hsiang Jonas ; Hwang, Jenq-Neng
Author_Institution :
Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA
Abstract :
Soft-decision decoding of linear block codes for robust H.263 video transmission in a zero-mean, additive white Gaussian noise (AWGN) channel is investigated. We implement an effective error concealment (EC) scheme at the source decoder to reduce the annoying artifacts caused by decoding a corrupted bit stream. To alleviate the spatial and temporal error propagation, an error prevention (EP) strategy is introduced at the H.263 encoder. Simulation results show that a large portion of the peak signal-to-noise ratio (PSNR) gain is obtained by ordered statistics decoding of the received sequence. Furthermore, the residual channel coding errors are concealed and compensated by realizing the proposed EC and EP schemes
Keywords :
AWGN channels; block codes; channel coding; decoding; forward error correction; image sequences; linear codes; video coding; visual communication; AWGN channel; PSNR gain; additive white Gaussian noise channel; artifact reduction; effective error concealment; error prevention; linear block codes; ordered statistics decoding; peak signal-to-noise ratio; residual channel coding errors; robust H.263 video transmission; soft-decision decoding; source decoder; spatial error propagation; temporal error propagation; AWGN; Block codes; Channel coding; Forward error correction; Maximum likelihood decoding; PSNR; Robustness; Statistics; Streaming media; Video compression;
Conference_Titel :
Multimedia Signal Processing, 1998 IEEE Second Workshop on
Conference_Location :
Redondo Beach, CA
Print_ISBN :
0-7803-4919-9
DOI :
10.1109/MMSP.1998.739043
