DocumentCode :
1289592
Title :
A video coding algorithm using vector-based techniques
Author :
Li, Weiping ; Cao, Hugh Q. ; Li, Shipeng ; Ling, Fan ; Segan, Scott A. ; Sun, Hongqiao ; Wus, John P. ; Zhang, Ya-Qin
Author_Institution :
Dept. of Comput. Sci. & Electr. Eng., Lehigh Univ., Bethlehem, PA, USA
Volume :
7
Issue :
1
fYear :
1997
fDate :
2/1/1997 12:00:00 AM
Firstpage :
146
Lastpage :
157
Abstract :
This paper presents an algorithm proposal submitted to MPEG-4 for video coding. The proposed algorithm addresses the functionality of improved coding efficiency for compression. It uses vector-based techniques for coding intraframes (the first frame and subsequent refreshing key frames) and motion-compensated difference frames. It uses the same motion estimation and motion compensation techniques as H.263. A video frame (I or P frame) is first decomposed into a set of vector bands using a vector wavelet transform. This stage of vector-based signal processing makes subsequent vector quantization in the vector bands very efficient. Lattice vector quantization is then used in the vector bands. A 100% labeling efficiency is achieved for lattice vector quantization by using a set of generalized labeling algorithms for various important lattices with pyramid and sphere boundaries. Finally, entropy coding is used to code the indexes generated from lattice vector quantization. Our coding results have shown that a gain in peak signal-to-noise ratio (PSNR) up to 8 dB for intraframe coding and up to 6 dB for interframe coding can be achieved over H.263. Subjective quality improvement of the proposed algorithm over H.263 can be easily observed
Keywords :
code standards; entropy codes; motion compensation; motion estimation; telecommunication standards; transform coding; vector quantisation; video coding; wavelet transforms; H.263; MPEG-4; coding efficiency; coding results; entropy coding; generalized labeling algorithms; interframe coding; intraframe coding; labeling efficiency; lattice vector quantization; motion compensated difference frames; motion compensation; motion estimation; peak signal to noise ratio; pyramid boundaries; sphere boundaries; subjective image quality; vector bands; vector based signal processing; vector based techniques; vector wavelet transform; video coding algorithm; video compression; video frame; Labeling; Lattices; MPEG 4 Standard; Motion compensation; Motion estimation; PSNR; Proposals; Signal processing algorithms; Vector quantization; Video coding;
fLanguage :
English
Journal_Title :
Circuits and Systems for Video Technology, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8215
Type :
jour
DOI :
10.1109/76.554426
Filename :
554426
Link To Document :
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