IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
A 4-way parallel CAVLC design for H.264/AVC 4Kx2K 60fps encoder
Huibo ZhongSha ShenYibo FanXiaoyang Zeng
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2011 Volume 8 Issue 22 Pages 1863-1869

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Abstract

This paper presents a high performance design for Context-Based Adaptive Variable Length Coding (CAVLC) used in the H.264/AVC standard. A two-stage encoder is proposed to make the scan and encode stage work simultaneously. The scan engine scans four coefficients at each cycle. Parallel encoder for four “levels” and parallel encoder for four “Run_before” are adopted to accelerate the encode engine. Only 120 cycles at most are needed to process one MB. The proposed CAVLC encoder can support 4Kx2K@60fps (frame per second) real-time encoding at 250MHz and the gate count is about 32k.

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© 2011 by The Institute of Electronics, Information and Communication Engineers
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