Title :
Iterative joint source-channel decoding of variable length encoded video sequences exploiting source semantics
Author :
Nguyen, Hang ; Duhamel, Pierre
Author_Institution :
Dept. of Res. & Innovation, Alcatel, Route De Nozay, France
Abstract :
This paper proposes an iterative joint source-channel decoding of variable length codes (VLC) sequences exploiting the inherent redundancy in the source stream, namely (i) the VLC structure (ii) the sequence structure. An optimum soft-input soft-output (SISO) maximum likelihood (ML) decoder of VLC sequences which is able to exploit both types of redundancies is first proposed, and shown to be optimal. This algorithm is then used in an iterative joint source-channel decoding. Performance results for transmitting video over AWGN channels are presented and compared to the soft-output Viterbi algorithm (SOVA) VLC decoder.
Keywords :
AWGN channels; Viterbi decoding; combined source-channel coding; computational complexity; image sequences; iterative decoding; maximum likelihood decoding; variable length codes; video coding; AWGN channels; computational complexity; iterative joint source-channel decoding; soft-input soft-output maximum likelihood; soft-output Viterbi algorithm; source semantic; variable length encoded video sequence; AWGN channels; Iterative algorithms; Iterative decoding; Maximum likelihood decoding; Redundancy; Robustness; Streaming media; Video sequences; Viterbi algorithm; XML;
Conference_Titel :
Image Processing, 2004. ICIP '04. 2004 International Conference on
Print_ISBN :
0-7803-8554-3
DOI :
10.1109/ICIP.2004.1421799
