LDPCA在分布式视频编码码率控制中的应用  

The Application of LDPCA in the Code Rate Control of Distributed Video Coding

作　　者：李静[1] 王尊亮[1] 李学明[1] 

机构地区：[1]北京邮电大学信息工程学院,北京100876

出　　处：《世界科技研究与发展》2008年第6期739-742,共4页World Sci-Tech R&D

基　　金：北京市自然科学基金(4072019)

摘　　要：系统的阐述了低密度奇偶校验累积码(Low-Density Parity-Check Accumulate Codes,LDPCA)在分布式视频编码(DistributedVideo Coding,DVC)码率控制中的应用。通过分析DVC中的重要环节:码率控制,在对几种变速率码对比的基础上重点讨论了LDPCA的原理及设计方案,并对其性能进行了仿真。仿真结果表明,采用中等码长的不规则LDPCA码表现出接近Slepian-Wolf理想界限的优异性能。This paper elaborated the application of Low-Density Parity-Check Accumulate Codes （LDPCA） in the code rate control of Distributed Video Coding. The code rate control, a key section of DVC, is analysed in this paper. The principle and project design of Low-Density Parity-Check Accumulate Codes （LDPCA） are introduced with comparing to some other rate-adaptive schemes. The performance verified by simulation is also included in this paper. And finally, the simulation results show that the proposed irregular LDPCA codes in the moderate length perform excellently close to the Slepian-Wolf bound.

关 键 词：分布式视频编码 Wyner—Ziv 低密度奇偶校验累积码 

分 类 号：TN919.81[电子电信—通信与信息系统]