PERFORMANCE OF ENTROPY-CONSTRAINED BLOCK TRANSFORM QUANTIZERS

被引:6
作者
FARVARDIN, N [1 ]
LIN, FY [1 ]
机构
[1] UNIV MARYLAND,CTR SYST RES,COLLEGE PK,MD 20742
关键词
QUANTIZATION; ORTHOGONAL TRANSFORM; ENTROPY; RATE; DISTORTION; GAUSS-MARKOV SOURCE; VECTOR QUANTIZATION;
D O I
10.1109/18.133264
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
An analysis of the rate-distortion performance of an entropy-constrained block transform quantization scheme operating on first-order stationary Gauss-Markov sources is presented. Uniform threshold quantization is employed to quantize the transform coefficients. An algorithm for optimum stepsize (or, equivalently, entropy) assignment among the quantizers is developed and a simple asymptotic formula indicating the high-rate performance of the block transform quantization scheme is presented. Finally, specific results determining the rate-distortion performance of the entropy-constrained block transform quantization scheme operating upon first-order Gauss-Markov sources are presented and comparisons with the Huang and Schultheiss block transform quantization, vector quantization, and predictive quantization are rendered.
引用
收藏
页码:1433 / 1438
页数:6
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