关键词: 音视频编码标准（AVS）, MPEG-2, 指数哥伦布码, 可复用的熵解码电路（VLD）, 高清晰度电视（HDTV）

Abstract: This paper presents a novel architecture of Variable Length Decoder（VLD） for AVS and MPEG2 decoders.The decoding of one AVS or MPEG2 VLD word can be carried out in one cycle with the reusable architecture.By reusing VLD controller and using combinational logic of look up table（LUT），the memory for storing AVS table can be avoided and circuit scale is reduced.For 0.18 μm CMOS process，the working frequency of the proposed VLD decoder reaches 166MHz with 9k logic gates and 3 kbit ROM.

Key words: Audio Video Coding Standard（AVS）, MPEG-2, Exp-Golomb code, Variable Length Decoder（VLD）, High Definition Television（HDTV）