Title :
Rate-distortion-optimal parameter choice in a wavelet image communications system
Author :
Garcia-Frias, Javier ; Benyamin, Dan ; Villasenor, John D.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
We describe the methodology and results of parameter optimizations performed with the aid of analytical expressions for the channel-induced distortion in a wavelet-based image communication system. R(D) curves are calculated independently for each subband, with each point on each curve representing (in addition to rate and distortion) an optimal choice of quantizer step size and channel code rate. A global optimization procedure is then performed to identify the best operating point on the R(D) curve for each subband
Keywords :
channel coding; image coding; optimisation; rate distortion theory; source coding; transform coding; visual communication; wavelet transforms; channel code rate; channel coding; channel-induced distortion; global optimization procedure; image coding; parameter optimization; quantizer step size; rate distortion theory; source coding; wavelet image communications system; Entropy coding; Error correction codes; Image analysis; Image communication; Optimization methods; Performance analysis; Protection; Rate distortion theory; Rate-distortion; Wavelet analysis;
Conference_Titel :
Image Processing, 1997. Proceedings., International Conference on
Conference_Location :
Santa Barbara, CA
Print_ISBN :
0-8186-8183-7
DOI :
10.1109/ICIP.1997.638664
