AVS熵编码的FPGA实现

本文从数字音视频编解码技术标准(AVS,Audio Video coding Standard)的熵编码原理出发,对算法模块进行分析,提出了一种使用较少存储空间来存储码表的方法,并结合算法特点给出了现场可编程门阵列(FPGA,Field-Programmable Gate Array)的实现方法。本设计中将码表查询、切换和指数哥伦布编码合并为一个流水线单元并行处理,节省了大量存储中间结果所需的空间;并将各任务并行执行,加快了处理速度。利用FPGA开发工具ISE10.1和仿真工具ModelSim SE6.2b,完成了AVS熵编码的FPGA设计与实现。

Implementation of AVS Entropy Encoding Based on FPGA

A profound analysis of the entropy encoding algorithm for AVS(Audio Video coding Standard)is performed based on the principle of entropy encoding method.This paper presents a method of using less rom to save data in coding table,and gives a realiza-tion method based on FPGA(Field-Programmable Gate Array)according to the algorithm characteristics.Coding table query,coding table switch and golomb coding are combined into a pipeline unit,saving a lot of intermediate memories.The parallel execution of entropy en-coding task resultes in higher processing speed.Using the FPGA development tool ISE10.1 and ModelSim SE 6.2b,entropy encoding of AVS based on FPGA can be implemented.