Edge Block Detection and Motion Vector Information Based Fast VBSME Algorithm
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概要
- 論文の詳細を見る
Compared with previous standards, H. 264/AVC adopts variable block size motion estimation (VBSME) and multiple reference frames (MRF) to improve the video quality. Full search motion estimation algorithm (FS), which calculates every search candidate in the search window for 7 block type with multiple reference frames, consumes massive computation power. Mathematical analysis reveals that the aliasing problem of subsampling algorithm comes from high frequency signal components. Moreover, high frequency signal components are also the main issues that make MRF algorithm essential. As we know, a picture being rich of texture must contain lots of high frequency signals. So based on these mathematical investigations, two fast VBSME algorithms are proposed in this paper, namely edge block detection based subsampling method and motion vector based MRF early termination algorithm. Experiments show that strong correlation exists among the motion vectors of those blocks belonging to the same macroblock. Through exploiting this feature, a dynamically adjustment of the search ranges of integer motion estimation is proposed in this paper. Combing our proposed algorithms with UMHS almost saves 96-98% Integer Motion Estimation (IME) time compared to the exhaustive search algorithm. The induced coding quality loss is less than 0.8% bitrate increase or 0.04dB PSNR decline on average.
- （社）電子情報通信学会の論文
- 2008-08-01
著者
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HUANG Yiqing
IPS, Waseda University
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LIU Qin
IPS, Waseda University
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GOTO Satoshi
IPS, Waseda University
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IKENAGA Takeshi
IPS, Waseda University
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Goto Satoshi
Waseda Univ. Jpn
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Ikenaga Takeshi
Waseda Univ.
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Ikenaga Takeshi
Graduate School Of Information Production And System Waseda University
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Ikenaga Takeshi
Graduate School Of Ips Waseda University
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Ikenaga Takeshi
Ips Waseda University
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Liu Qin
Nanjing Univ.
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Huang Yiqing
Graduate School Of Information Production And System Waseda University
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Ishikawa Tatsuyuki
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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