DocumentCode :
2932105
Title :
Variable block size error concealment scheme based on H.264/AVC non-normative decoder
Author :
Wang, Lei ; Wang, Jun ; Goto, Satoshi ; Ikenaga, Takeshi
Author_Institution :
Waseda Univ., Tokyo
fYear :
2007
fDate :
Nov. 28 2007-Dec. 1 2007
Firstpage :
104
Lastpage :
107
Abstract :
As the newest video coding standard, H.264/AVC can achieve high compression efficiency. At the same time, due to the high-efficiently predictive coding and the variable length entropy coding, it is more sensitive to transmission errors. So error concealment (EC) in H.264 is very important when compressed video sequences are transmitted over error-prone networks and erroneously received. To achieve higher EC performance, this paper proposes variable block size error concealment scheme (VBSEC) by utilizing the new concept of variable block size motion estimation (VBSME) in H.264 standard. This scheme provides four EC modes and four sub-block partitions. The whole corrupted macro-block (MB) will be divided into variable block size adaptively according to the actual motion. More precise motion vectors (MV) will be predicted for each sub-block. We also produce a more accurate distortion function based on spatio-temporal boundary matching algorithm (STBMA). By utilizing VBSEC scheme based on our STBMA distortion function, we can reconstruct the corrupted MB in the inter frame more accurately. The experimental results show that our proposed scheme can obtain maximum PSNR gain up to 1.72 dB and 0.48 dB, respectively compared with the boundary matching algorithm (BMA) adopted in the JM11.0 reference software and STBMA.
Keywords :
data compression; decoding; entropy codes; image matching; image motion analysis; variable length codes; video coding; H.264/AVC nonnormative decoder; compressed video sequences; distortion function; error concealment; motion vectors; predictive coding; spatio-temporal boundary matching algorithm; variable block size error concealment scheme; variable length entropy coding; video coding standard; Automatic voltage control; Decoding; Entropy coding; Motion estimation; PSNR; Partitioning algorithms; Predictive coding; Software algorithms; Video coding; Video sequences; Variable block size error concealment; spatio-temporal boundary matching algorithm;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Intelligent Signal Processing and Communication Systems, 2007. ISPACS 2007. International Symposium on
Conference_Location :
Xiamen
Print_ISBN :
978-1-4244-1447-5
Electronic_ISBN :
978-1-4244-1447-5
Type :
conf
DOI :
10.1109/ISPACS.2007.4445834
Filename :
4445834
Link To Document :
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