Zero-block inter/intra mode decision for MPEG-2 to H.264/AVC inter P-frame transcoding

NCUIR > College of Electrical Engineering & Computer Science > Department of Communication Engineering > journal & Dissertation > Item 987654321/51496

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Title:	Zero-block inter/intra mode decision for MPEG-2 to H.264/AVC inter P-frame transcoding
Authors:	Su,CJ;Lin,Y
Contributors:	通訊工程學系
Date:	2010
Issue Date:	2012-03-27 18:54:26 (UTC+8)
Publisher:	國立中央大學
Abstract:	The latest H.264/AVC achieves better coding performance compared to prior video coding standards such as MPEG-2. To provide the interoperability between MPEG-2 and H.264/AVC, the authors propose an efficient inter/intra mode decision for MPEG-2 to H.264/AVC inter P-frame transcoding, which is completed in two stages. In the first stage, a zero-block inter/intra mode decision scheme is employed to select both candidate inter/intra modes for prediction based on MPEG-2 coded macroblock type and motion vector information. Fast motion estimation with various search windows is then incorporated into inter mode decision to improve computation to a great extent. For intra mode decision the authors suggest a sum of absolute transform differences based intra mode decision scheme to further eliminate improbable modes for rate-distortion optimisation calculations. The experimental results reveal that average 85% of computation time (a speed-up factor of seven) can be reduced compared to the fully decoding/encoding procedure. The degradation in the rate-distortion performance is fairly small.
Relation:	IET IMAGE PROCESSING
Appears in Collections:	[Department of Communication Engineering] journal & Dissertation

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