{"title":"A new fast rate control algorithm for JPEG2000","authors":"Wu Zongze","doi":"10.1504/IJMIC.2006.011937","DOIUrl":null,"url":null,"abstract":"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.","PeriodicalId":46456,"journal":{"name":"International Journal of Modelling Identification and Control","volume":"1 1","pages":"159-163"},"PeriodicalIF":0.6000,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Modelling Identification and Control","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1504/IJMIC.2006.011937","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"AUTOMATION & CONTROL SYSTEMS","Score":null,"Total":0}
引用次数: 2
Abstract
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.
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.
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