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Selective Intra Block Size Decision and Fast Intra Mode Decision Algorithms for H.264/AVC Encoder
Karunanithi BHARANITHARAN Jiun-Ren DING Bo-Wei CHEN Jhing-Fa WANG
IEICE TRANSACTIONS on Information and Systems
Publication Date: 2012/11/01
Online ISSN: 1745-1361
Print ISSN: 0916-8532
Type of Manuscript: LETTER
Category: Data Engineering, Web Information Systems
intra prediction, edge detection, RDO, advanced video coding, inter prediction,
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In H.264/AVC intra frame coding, the rate-distortion optimization (RDO) is employed to select the optimal coding mode to achieve the minimum rate-distortion cost. Due to a large number of combinations of coding modes, the computational burden of Rate distortion optimization (RDO) becomes extremely high in intra prediction. In this paper, we proposed an efficient selective intra block size decision (SIB) that selects the appropriate block size for intra prediction, further proposed fast intra prediction algorithm reduces a number of modes required for RDO that significantly reduces the encoder complexity. Experimental results show that the proposed fast mode decision algorithm reduces the encoding time by up to 68% with negligible video quality degradation.