Title :
Using variable-length error-correcting codes in MPEG-4 video
Author :
Buttigieg, Victor ; Deguara, Rennie
Author_Institution :
Dept. of Commun. & Comput. Eng., Malta Univ.
Abstract :
Reversible variable length (RVL) codes are used in MPEG-4 video coding to improve its error resilience. Algorithms used to design variable-length error-correcting (VLEC) codes are modified so as to construct efficient RVL codes with a smaller average length than those found in the literature. It is also shown that RVL codes are a special (weak) class of VLEC codes. Consequently more powerful VLEC codes can be used in the MPEG-4 codec and it is shown that performance gains of up to 20 dB in peak signal to noise ratio (PSNR) can be obtained using a soft-decision sequential decoder with relatively simple VLEC codes. This increase in performance is obtained at the expense of an order of magnitude increase in decoding complexity
Keywords :
error correction codes; sequential decoding; variable length codes; video coding; MPEG-4 video coding; decoding complexity; peak signal to noise ratio; reversible variable-length error-correcting codes; soft-decision sequential decoder; Computer errors; Data compression; Decoding; Error analysis; Error correction; Error correction codes; Heuristic algorithms; MPEG 4 Standard; Resilience; US Department of Transportation;
Conference_Titel :
Information Theory, 2005. ISIT 2005. Proceedings. International Symposium on
Conference_Location :
Adelaide, SA
Print_ISBN :
0-7803-9151-9
DOI :
10.1109/ISIT.2005.1523774
