一种高速JPEG2000 MQ编码器的VLSI实现  

A VLSI Implementation of High-Speed MQ Encoder for JPEG2000

作　　者：王镇道[1] 章兢[2] 曾云[1] 陈迪平[1] 

机构地区：[1]湖南大学应用物理系,湖南长沙410082 [2]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《微计算机信息》2006年第09X期232-233,213,共3页Control & Automation

基　　金：湖南省科技计划资助项目(05JT1015)

摘　　要：JPEG2000采用的MQ编码器是一种优于Huffman编码的无损数据压缩算法。基于JPEG2000算法规程的MQ编码器速度较慢,限制了整个编码系统的实时性。本文采用部分并行算法,MQ编码器每个时钟最多可以编码2对数据,有效提高了编码器的数据吞吐率,并设计了基于3级流水的VLSI结构。试验结果表明,该算法平均每个时钟编码1.32bit,比普通算法的编码效率提高了约32%。The MQ encoder adopted in JPEG2000 is a lossless compress algorithm superior to Huffman encoder. However, an inefficient MQ implementation, based on the algorithm presented in JPEG2000 standard, becomes a bottleneck for the real-time application. A partial parallel scheme is proposed for the MQ encoder,which can process two data-pairs to increase the system throughout efficiently. A VLSI implementation of 3-stage pipelined MQ encoder is presented. Experiment results show that the proposed algorithm, processing 1.32 data-pairs per clock in average, can achieve 32% improvement in encoder throughout by comparison with the normal algorithm which processes one data-pair per clock.

关 键 词：MQ编码器 VLSI JPEG2000 图像压缩 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]