An Irregular Search Window Reuse Scheme for MPEG-2 to H.264 Transcoding
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概要
- 論文の詳細を見る
Motion estimation (ME) is a computation-intensive module 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 processing. However, directly applying MPEG-2 MV as search center will bring difficulties on application of data reuse method in hardware design, because the irregular overlapping of search windows between successive macro block (MB). In this paper, we propose a search window reuse scheme for transcoding, especially for HDTV application. By utilizing the similarity between neighboring MV, overlapping area of search windows can be regularized. Experiment results show that our method achieves average 93.1% search window reuse-rate in HDTV720p sequence with almost no video quality degradation. Compared to transcoding method without any data reuse scheme, bandwidth of the proposed method can be reduced to 40.6% of that.
- （社）電子情報通信学会の論文
- 2008-03-01
著者
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GOTO Satoshi
Graduate School of Information, Production and Systems, Waseda University
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SONG Yang
Graduate School of Information, Production and Systems, Waseda University
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Song Yang
Graduate School Of Information Production And Systems Waseda University
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WEI Xiang-Hui
Graduate School of Information, Production and Systems, Waseda University
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LI Shen
Graduate School of Information, Production and Systems, Waseda University
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Goto Satoshi
Graduate School Of Information Production And System Waseda University
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Li Shen
Graduate School Of Information Production And Systems Waseda University
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Wei Xiang-hui
Graduate School Of Information Production And Systems Waseda University
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