Abdelazim, Abdelrahman, Mein, Stephen James, Varley, Martin Roy, Grecos, Christos and Ait-Boudaoud, Djamel (2011) Phase correlation based adaptive mode decision for the H.264/AVC. In: Real-Time Image and Video Processing 2011, 24 January 2011, San Francisco Airport, California, USA.
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Official URL: http://dx.doi.org/10.1117/12.873077
The H.264 video coding standard achieves high performance compression and image quality at the expense of increased encoding complexity, due to the very refined Motion Estimation (ME) and mode decision processes. This paper focuses on decreasing the complexity of the mode selection process by effectively applying a novel fast mode decision algorithm. Firstly the phase correlation is analysed between a macroblock and its prediction obtained from the previously encoded adjacent block. Relationships are established between the correlation value and object size and also best fit motion vector. From this a novel fast mode decision and motion estimation technique has been developed utilising preprocessing frequency domain ME in order to accurately predict the best mode and the search range. We measure the correlation between a macroblock and the corresponding prediction. Based on the result we select the best mode, or limit the mode selection process to a subset of modes. Moreover the correlation result is also used to select an appropriate search range for the ME stage. Experimental results show that the proposed algorithm significantly reduces the motion estimation time whilst maintaining similar Rate Distortion performance, when compared to both the H.264/AVC Joint Model (JM) reference software and recently reported work.
|Item Type:||Conference or Workshop Item (Paper)|
|Additional Information:||Copyright 2011 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.|
|Subjects:||Computer science > Computer architectures & operating systems|
|Schools:||College of Science and Technology > School of Engineering|
|Deposited By:||Carmit Erez|
|Deposited On:||05 Jul 2012 11:41|
|Last Modified:||09 Aug 2016 15:16|
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