Title :
Rate-distortion optimization for the SPIHT encoder
Author :
Lin, Ken K. ; Gray, Robert M.
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., CA, USA
Abstract :
We study the rate-distortion performance of the set partitioning in hierarchical trees (SPIHT) image compression algorithm and present an optimization method that produces the bit stream with minimum Lagrangian cost J=D+λR for a given stopping criterion. Although there are only three applicable stop points at each bit plane, experiments show that substantial improvements can be obtained over a wide range of bit rates
Keywords :
data compression; image coding; optimisation; rate distortion theory; SPIHT encoder; image compression; minimum Lagrangian cost; optimization; rate-distortion performance; set partitioning in hierarchical trees; stopping criterion; Bit rate; Codecs; Cost function; Decoding; Energy resolution; Image coding; Image reconstruction; Lagrangian functions; Rate-distortion; Streaming media;
Conference_Titel :
Data Compression Conference, 2001. Proceedings. DCC 2001.
Conference_Location :
Snowbird, UT
Print_ISBN :
0-7695-1031-0
DOI :
10.1109/DCC.2001.917143
