New dictionaries for matching pursuits video coding

Author

De Vleeschouwer, C. ; Macq, B.

Author_Institution

Lab. de Telecommun. & Teledetection, Univ. Catholique de Louvain, Belgium

Volume

1

fYear

1998

fDate

4-7 Oct 1998

Firstpage

764

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Processing, 1998. ICIP 98. Proceedings. 1998 International Conference on

Conference_Location

Chicago, IL

Print_ISBN

0-8186-8821-1

Type

conf

DOI

10.1109/ICIP.1998.723607

Filename

723607