DocumentCode :
2821598
Title :
Efficient dead-zone plus uniform threshold scalar quantization of generalized Gaussian random variables
Author :
Duan, Yizhou ; Sun, Jun ; Liu, Jiaying ; Guo, Zongming
Author_Institution :
Inst. of Comput. Sci. & Technol., Peking Univ., Beijing, China
fYear :
2011
fDate :
6-9 Nov. 2011
Firstpage :
1
Lastpage :
4
Abstract :
This paper studies the rate-distortion (R-D) performance of entropy-constrained dead-zone plus uniform threshold scalar quantization (DZ+UTSQ) and nearly-uniform reconstruction quantization (NURQ) for generalized Gaussian distribution (GGD). We first derive the preliminary constraint of R-D optimized DZ+UTSQ/NURQ for GGD. Then for GGD source of actual DCT coefficients, the refined constraint and precise conditions of optimum DZ+UTSQ/NURQ are rigorously deduced in the real coding bit rate range. Based on above analysis, efficient DZ+UTSQ/NURQ design criteria are proposed to reasonably simplify the implementation of effective quantizer in practice.
Keywords :
Gaussian distribution; discrete cosine transforms; encoding; entropy; quantisation (signal); DCT coefficients; entropy-constrained dead-zone; generalized Gaussian distribution; generalized Gaussian random variables; nearly-uniform reconstruction quantization; rate distortion performance; real coding bit rate range; uniform threshold scalar quantization; Bit rate; Discrete cosine transforms; Encoding; Indexes; PSNR; Quantization; Shape;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Visual Communications and Image Processing (VCIP), 2011 IEEE
Conference_Location :
Tainan
Print_ISBN :
978-1-4577-1321-7
Electronic_ISBN :
978-1-4577-1320-0
Type :
conf
DOI :
10.1109/VCIP.2011.6115946
Filename :
6115946
Link To Document :
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