电子学报2013，Vol.41Issue(5)：918-925,8.DOI:10.3969/j.issn.0372-2112.2013.05.014
多上下文MQ编码器优化与VLSI实现
Optimization of Two-Context MQ-Encoder and Implementation of VLSI Architecture
摘要
Abstract
MQ-encoder is a key bottleneck in the JPEG2000 image compression system.In this paper,the dependence between contexts in the MQ-encoder has been extracted;and an improved mechanism has been proposed to acquire indexes by separating the "start-up" states and remaining states.Besides,a prediction method has been proposed to resolve the stall problem when the current context is the same as the previous context.Also the probabilities of MPS and LPS coding events in the renormalization procedure have been analyzed;and either of the MPS and LPS coding events has been optimized.Based on this improved arithmetic,a VLSI architecture for Two-context MQ-encoder is proposed.Synthesis result shows that the processing speed of the MQ-encoder could reach as high as 286.80MHz with a throughput of 573.60Msymbols/sec.Compared with the "Brute force with modified byteout" architecture,the throughput obtained in this work has been improved by 35 ％ and the area has been reduced by 78 ％.关键词
MQ编码器/JPEG2000/并行Key words
MQ-encoder/ JPEG2000/ parallel分类
信息技术与安全科学引用本文复制引用
邸志雄,史江义,刘凯,李云松,马佩军,都跃..多上下文MQ编码器优化与VLSI实现[J].电子学报,2013,41(5):918-925,8.基金项目
陕西省自然科学基金(No.2010JM8015) （No.2010JM8015）
