Architecture of high-throughput context adaptive variable length coding decoder in AVC/H.264

Gwo Giun Lee, Shu-Ming Xu, Chun-Fu Chen, Ching-Jui Hsiao

Abstract: In this paper, a High-throughput Context Adaptive Variable Length Coding decoder which is capable for supporting AVC/H.264 HP@level 4.2 has been presented. To increase throughput, multi-symbol decoders for “LEVEL” and “RunBefore” and architecture of fast zero insertion are presented to reduce processing cycles to reach high-throughput rate. Finally, the experimental results show that the throughput of presented Context Adaptive Variable Length Coding decoder achieves the level limitation of level 4.2 in AVC/H.264 and the synthesis result shows that the gate count is about 17.2K gates at a clock constrain of 108MHz.