NDLI: An Irregular Search Window Reuse Scheme for Motion Estimation in MPEG-2 to H.264 Transcoding

Content Provider	IEEE Xplore Digital Library
Author	Xianghui Weir Shen Li Yang Song Goto, Satoshi
Copyright Year	2007
Description	Author affiliation: Graduate Sch. of Inf., Waseda Univ., Kitakyushu (Xianghui Weir; Shen Li; Yang Song; Satoshi Goto)
Abstract	Motion estimation (ME) is a computation-intensive operation in video coding system. In MPEG-2 to H.264 transcoding, motion vector (MV) from MPEG-2 reused as search center in H.264 encoder is a simple but effective technique to simplify ME procedure. However directly introducing MPEG-2 MV will bring irregular overlapping between search windows of successive macroblocks (MB) which invalidates the data reuse scheme in hardware design of ME module. In this paper, the authors propose a search window reuse scheme for transcoding in HDTV application. By utilizing the similarity between neighboring MVs, overlapping of search windows between successive MBs can be regularized. Experiment results show that our method achieve average 93.1% search window reuse rate in HDTV sequence with almost no video quality degradation. And the bandwidth can be reduced to 92.5 Mbytes/s based on theoretical calculation which is only 40.6% of that without this scheme.
Starting Page	1987
Ending Page	1990
File Size	311275
Page Count	4
File Format	PDF
ISBN	1424409209
DOI	10.1109/ISCAS.2007.378426
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-05-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Motion estimation Transcoding Video coding Hardware Video compression HDTV Transform coding Decoding Application software Bandwidth
Content Type	Text
Resource Type	Article

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