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http://dx.doi.org/10.5909/JBE.2008.13.2.200

A Fast 4X4 Intra Prediction Method using Motion Vector Information and Statistical Mode Correlation between 16X16 and 4X4 Intra Prediction In H.264|MPEG-4 AVC  

Na, Tae-Young (Information and Communications University)
Jung, Yun-Sik (Information and Communications University)
Kim, Mun-Churl (Information and Communications University)
Hahm, Sang-Jin (Korea Broadcasting System)
Park, Chang-Seob (Korea Broadcasting System)
Park, Keun-Soo (Korea Broadcasting System)
Publication Information
Journal of Broadcast Engineering / v.13, no.2, 2008 , pp. 200-213 More about this Journal
Abstract
H.264| MPEG-4 AVC is a new video codingstandard defined by JVT (Joint Video Team) which consists of ITU-T and ISO/IEC. Many techniques are adopted fur the compression efficiency: Especially, an intra prediction in an inter frame is one example but it leads to excessive amount of encoding time due to the decision of a candidate mode and a RDcost calculation. For this reason, a fast determination of the best intra prediction mode is the main issue for saving the encoding time. In this paper, by using the result of statistical relation between intra $16{\times}16$ and $4{\times}4$ intra predictions, the number of candidate modes for $4{\times}4$ intra prediction is reduced. Firstly, utilizing motion vector obtained after inter prediction, prediction of a block mode for each macroblock is made. If an intra prediction is needed, the correlation table between $16{\times}16$ and $4{\times}4$ intra predicted modes is created using the probability during each I frame-coding process. Secondly, using this result, the candidate modes for a $4{\times}4$ intra prediction that reaches a predefined specific probability value are only considered in the same GOP For the experiments, JM11.0, the reference software of H.264|MPEG-4 AVC is used and the experimental results show that the encoding time could be reduced by 51.24% in maximum with negligible amounts of PSNR drop and bitrate increase.
Keywords
video coding; H.264|MPEG-4 AVC; intra prediction; inter prediction; motion vector; block mode decision;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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