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�������պ����ѧѧ�� 2007, Vol. 33 Issue (02) :219-223    DOI:
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Fast selective algorithm of Intra prediction for H.264/AVC
Meng Qinglei, Yao Chunlian, Song Jianbin, Li Wei*
School of Computer Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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�ؼ����� H.264/AVC   ֡��Ԥ��   ͼ����   Ԥ��ģʽ   �����     
Abstract�� The newest video coding standard H.264/AVC provides several predic ting modes and directions for Intra prediction in the spatial region, and the op timal mode was selected by rate-distortion optimization(RDO) with high coding c omplexity. In order to solve this problem, the fast selection algorithm was prop osed from different aspects: Firstly, for luminance mode selection, the method w as proposed that utilizes the image entropy value to predict the mode of the mac roblock, and updates the threshold adaptively by a sliding window. Secondly, int ermediate computing results were reused to reduce the predicting directions. Fin ally, in the RDO performance, the arithmetic structure of Intra prediction was c hanged with calculating the best chromance mode separately. Experimental results s how that with similar distortion performance, the algorithm that adopt the above three strategy can efficiently reduce the computational complexity up to 76% wi th 2.6% increase of bits rate averagely.
Keywords�� H.264/AVC   Intra prediction   image entropy   prediction mode   correlation     
Received 2006-03-21;

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About author: ������(1980-),��,����������,��ʿ��,mql198029@gmai l.com.
������, Ҧ����, �ν���, ���.һ������H.264/AVC�Ŀ���֡��Ԥ��ѡ���㷨[J]  �������պ����ѧѧ��, 2007,V33(02): 219-223
Meng Qinglei, Yao Chunlian, Song Jianbin, Li Wei.Fast selective algorithm of Intra prediction for H.264/AVC[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(02): 219-223
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