Title :
New dictionaries for matching pursuits video coding
Author :
De Vleeschouwer, C. ; Macq, B.
Author_Institution :
Lab. de Telecommun. & Teledetection, Univ. Catholique de Louvain, Belgium
Abstract :
“Matching pursuits” is a signal expansion technique whose efficiency for video coding has already been demonstrated in the MPEG-4 community. In this paper, we focus our attention on some aspects of the algorithm. Firstly, the relevance of the orthogonalization of the signal expansion is investigated. Secondly, a subband dictionary is proposed as an alternative to the Gabor dictionary, used up to now. Equivalent levels of quality are achieved with both dictionaries but the computational cost is significantly reduced when using the subband one. Eventually, the entropy coding stage of the algorithm is studied
Keywords :
entropy codes; image resolution; transform coding; video coding; wavelet transforms; MPEG-4; algorithm; computational cost reduction; displaced frame difference; efficiency; entropy coding; matching pursuits; multiresolution theory; orthogonalization; signal expansion technique; subband dictionary; video coding; video quality; wavelets; Computational efficiency; Design for disassembly; Dictionaries; Discrete cosine transforms; Entropy; MPEG 4 Standard; Matching pursuit algorithms; Vectors; Video coding; Video compression;
Conference_Titel :
Image Processing, 1998. ICIP 98. Proceedings. 1998 International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-8186-8821-1
DOI :
10.1109/ICIP.1998.723607
