Title :
Stealing bits from a quantized source
Author :
Cohen, Aaron S. ; Draper, Stark C. ; Martinian, Emin ; Wornell, Gregory W.
Author_Institution :
MIT, Cambridge, MA, USA
Abstract :
We analyze the efficiency of source requantization to reduce rate when starting with an arbitrary rate-distortion achieving codebook. In the quadratic-Gaussian case, it is possible to get within 0.5 bits/sample of the rate-distortion bound, i.e., all good codebooks automatically have close to successive-refinement structure. This same performance is achievable when rate is stolen by embedding bits in the source reconstruction.
Keywords :
quantisation (signal); rate distortion theory; source coding; bits stealing; quadratic-Gaussian case; quantized source; rate-distortion bound; source coding; source reconstruction; source requantization efficiency; successive-refinement structure; Decoding; Degradation; Distortion measurement; Rate distortion theory; Rate-distortion; Source coding; Time sharing computer systems;
Conference_Titel :
Information Theory, 2002. Proceedings. 2002 IEEE International Symposium on
Print_ISBN :
0-7803-7501-7
DOI :
10.1109/ISIT.2002.1023336
