Title :
Iterative joint source-channel decoding using turbo codes for MPEG-4 video transmission
Author :
Ma, Xiao Feng ; Lynch, William E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada
Abstract :
This paper presents a novel iterative joint source-channel decoding scheme for MPEG-4 video transmission over noisy channels. The proposed scheme, on one hand, utilizes the channel soft outputs generated by the turbo decoder to assist video decompression. On the other hand, the syntactic/semantic information from the video decompressor is used to modify the extrinsic information so as to improve the error correction capability of the turbo decoder. With the proposed video packet mixer, the scheme can correct most turbo coding blocks with a large number of errors. Simulation results show significant improvement in terms of PSNR, reconstructed video quality, as well as BER over turbo decoding only.
Keywords :
AWGN channels; combined source-channel coding; error correction; error statistics; image reconstruction; iterative decoding; turbo codes; video coding; AWGN channels; BER; MPEG-4 video transmission; PSNR; coding block errors; decoder error correction capability; decompressor syntactic/semantic information; iterative joint source-channel decoding; noisy channels; reconstructed video quality; turbo codes; turbo decoder soft outputs; video decompression; video packet mixer; Error correction; Image coding; Image reconstruction; Iterative decoding; MPEG 4 Standard; PSNR; Protection; Transform coding; Turbo codes; Video compression;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
Print_ISBN :
0-7803-8484-9
DOI :
10.1109/ICASSP.2004.1326912
