一种CAVLC解码器的研究与实现  

Research and implementation of a CAVLC decoder

作　　者：宋娜[1] 刘剑武[1] 

机构地区：[1]莆田学院电子信息工程系,福建莆田351100

出　　处：《江苏师范大学学报（自然科学版）》2013年第2期42-46,共5页Journal of Jiangsu Normal University：Natural Science Edition

基　　金：福建省教育厅B类科技研究项目(JB11163);福建省服务海西项目子课题(2008HX01(1)-MZ1201)

摘　　要：熵解码算法性能好坏是H.264视频解码器性能高低的关键因素之一.基于上下文的自适应可变长编码CAVLC是H.264中采用的两种熵编码方案之一,通过对其解码过程的分析,用Verilog HDL实现了CAVLC解码器的硬件设计,用简单的加法操作代替耗时的查表操作,加快了解码速度,并实现仿真验证及综合,可达到1080p(@30Hz)视频的实时解码要求.Entropy decoding algorithm performance is one of the key factors of H.264video decoder performance.Context-based adaptive variable length code（CAVLC）is one of the entropy coding scheme which H.264used.Through the analysis of the decoding process,the hardware of CAVLC decoder is designed by using Verilog HDL language.The decoding speed is lifted by using the simple addition operation instead of the time-consuming operation to look-up table.The results of simulation validation and comprehensiveness show that the design can meet 1080p（@30Hz）real-time video decoding requirements.

关 键 词：H 264 CAVLC 实时解码 

分 类 号：TN621.3[电子电信—电路与系统]