一种新的JPEG2000快速速率控制算法

IF 0.6 Q4 AUTOMATION & CONTROL SYSTEMS

International Journal of Modelling Identification and Control Pub Date : 2006-01-01 DOI:10.1504/IJMIC.2006.011937

Wu Zongze

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引用次数: 2

摘要

提出了一种简化方案，便于用对数表达式计算率失真斜率(rd -斜率)。另一种方法用于快速截断码流，它可以根据编码通道的8位rd斜率在256个质量层中进行轮询搜索，找到每个代码块的所有截断点。新的速率控制算法不仅加快了速率分配的速度，而且占用了更少的内存。实验结果表明，重建图像的质量仅略有下降。

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A new fast rate control algorithm for JPEG2000

A simplification scheme is proposed to facilitate calculation of the Rate-Distortion slopes (RD-slopes) by means of logarithm expression. The other approach is used to fast truncate the code streams, which can find all the truncation points for every code-block through a round search among the 256 quality layers based on the 8-bit RD-slopes of the coding passes. The new rate control algorithm not only speeds up the process of rate allocation but also uses less memory. Experimental results show that the quality of reconstructed images has only slightly decreased.

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来源期刊

International Journal of Modelling Identification and Control AUTOMATION & CONTROL SYSTEMS-

CiteScore

1.70

自引率

57.10%

发文量

期刊介绍： Most of the research and experiments in the fields of science, engineering, and social studies have spent significant efforts to find rules from various complicated phenomena by observations, recorded data, logic derivations, and so on. The rules are normally summarised as concise and quantitative expressions or “models". “Identification" provides mechanisms to establish the models and “control" provides mechanisms to improve the system (represented by its model) performance. IJMIC is set up to reflect the relevant generic studies in this area.