Title :
Adaptation to nonstationarity of embedded wavelet code stream
Author :
Wu, Xiaolin ; Barthel, Kai Uwe ; Ruhl, Gerhard
Author_Institution :
Dept. of Comput. Sci., Univ. of Western Ontario, London, Ont., Canada
Abstract :
We address a problem that affects the performance of all embedded wavelet image codecs-how to track time varying statistics of the coefficient code stream. We propose a family of techniques for rapid adaptation of arithmetic coding to changing statistics of the wavelet coefficients. These techniques improve the compression performance of existing wavelet image codecs, particularly at high bit rates and for lossless coding
Keywords :
adaptive codes; arithmetic codes; binary codes; codecs; data compression; entropy codes; image coding; statistical analysis; transform coding; wavelet transforms; adaptive embedded entropy coding; arithmetic coding; binary code stream; coefficient code stream; compression performance; embedded wavelet code stream; embedded wavelet image codecs; high bit rates; lossless coding; nonstationarity adaptation; performance; time varying statistics tracking; wavelet coefficients; Arithmetic; Context modeling; Image coding; Probability; Random processes; Statistical distributions; Statistics; Streaming media; Wavelet coefficients; Wavelet domain;
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.1998.723373
