Title: Modification and implementation of an edge-based fast intra prediction mode decision algorithm for H.264/AVC high resolution real-time systems
Authors: Chiang, Kuen-Cheng
Wu, Ming Feng
Shann, Jean Jyh-Jiun
Department of Computer Science
Keywords: Mode decision;Direction decision;Vector calculation;Intra prediction;H.264/AVC;Five-value MB sorting;Butterfly architecture;Histogram strength accumulation
Issue Date: 1-Feb-2012
Abstract: In this paper, we propose an architecture for H.264/AVC fast intra-prediction-mode decision making in high resolution real-time applications. Intra-prediction-mode decision making requires many computations of H.264/AVC video coding, and also extra time for mode generation for intra prediction mode decisions. Hence, there exists a bottleneck in the execution of high resolution real-time applications. To improve the operation of intra prediction mode decision, we use an algorithm which, based on the edge information of an object, will reduce estimations of mode predictions by 66%; with negligible loss of video quality and a small increase in bit-rate of video stream. We propose a low cost architecture, with gate counts reduced by 50% compared with former design. The total gate count is 86,671 and the maximum operating frequency is 250 MHz using TSMC 0.18 mu m cell-based technology. The experimental results show our design is a strong competitor with most modern high resolution, real-time video processing. (C) 2011 Elsevier Inc. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jvcir.2011.10.007
ISSN: 1047-3203
DOI: 10.1016/j.jvcir.2011.10.007
Volume: 23
Issue: 2
Begin Page: 245
End Page: 253
Appears in Collections:Articles

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