Title :
Scalar quantization noise analysis and optimal bit allocation for a wavelet pyramid image coding system
Author :
Jie Chen ; Itoh, Slutichi ; Hasimoto, Takeshi
Author_Institution :
Dept. of Electron., Univ. of Electro-Commun., Tokyo, Japan
Abstract :
A complete analysis for the reconstruction noise due to the scalar quantization of a wavelet pyramid image coding system is given. It is shown that when the optimal bit allocation scheme is adopted, the reconstruction noises and the quantization noises of the wavelet pyramid system become regular, and that the reconstruction noises can be approximated to stationary white noises. Particularly, it is shown that with only one quantization mean-square-error (MSE) of the wavelet decomposition at any layer of the wavelet pyramid, all of the reconstruction MSEs and the quantization MSEs of the wavelet pyramid can be easily calculated. Simulations verify the theoretical results
Keywords :
analogue-digital conversion; image coding; image reconstruction; wavelet transforms; mean-square-error; optimal bit allocation; reconstruction noise; scalar quantization; wavelet pyramid image coding system; Bit rate; Error analysis; Image analysis; Image coding; Image reconstruction; Light rail systems; Quantization; Wavelet analysis;
Conference_Titel :
Singapore ICCS/ISITA '92. 'Communications on the Move'
Print_ISBN :
0-7803-0803-4
DOI :
10.1109/ICCS.1992.254929