基于AVS视频标准的熵编码器的FPGA设计  

FPGA Design of Extropy Encoder Based on AVS

作　　者：王小东[1] 张卫宁[1] 

机构地区：[1]山东大学信息科学与工程学院,山东济南250100

出　　处：《电气电子教学学报》2010年第6期51-54,共4页Journal of Electrical and Electronic Education

摘　　要：AVS视频标准中的熵编码部分是将语法元素与量化系数进行Exb-Golomb编码与存储的重要环节。为了进一步提高熵编码器的效率,本文采用了一种检测"哥伦布首位1"的FPGA实现算法,用(run,level)联合坐标寻址查找2D-VLC码表,并用FIFO进行暂存和输出码流的方法,降低了运算量以及硬件资源,提高了运行速度。该Exb-Golomb熵编码器已通过RTL(Register Transfer Level)级仿真和综合,占用硬件资源LUT6359门,相比其他同类设计的AVS熵编码器,大大减少了硬件资源的占用。Entropy encoder in national audio and video coding standard takes on the task of coding all the syntaxs and quantization coefficients into Exb-Golomb code and storing them.In order to rise the encoding efficiency of Exb-Golomb encoder,this paper proposes a method of ＂first coding 1 of Exb-Golomb detecting＂ architecture of FPGA, joint coordinate of run and level as the address to look up the 2D-VLC table,a FIFO register to store and export the encoding stream simultaneously,which reduces computation and hardware resources ,but rises the speed at the same time.This encoder has passed RTL（Register Transfer Level） class emulation and synthesis,and consumed LUT（Look Up Table） of 6359 gates. Compared to other same Exb-Golomb encoder based on AVS,it reduces hardware resources greatly.

关 键 词：AVS标准 熵编码 Exb-Golomb 2D-VLC FIFO 

分 类 号：TN911.72[电子电信—通信与信息系统]