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Complexity Based Fast Coding Mode Decision for MPEG-2 / H.264 Video Transcoding
Shen Li; Lingfeng Li; Ikenaga, T.; Ishiwata, S.; Matsui, M.; Goto, S.;
Circuits and Systems, 2006. APCCAS 2006. IEEE Asia Pacific Conference on
4-7 Dec. 2006
Page(s):574
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577
Abstract:
The coexistence of MPEG-2 and its powerful successor H.264/AVC has created a huge need for MPEG-2/H.264 video transcoding. This paper proposes a 2D Sobel filter based motion vector domain method and a DCT domain method to measure macroblock complexity and realize efficient H.264 candidate mode decision. A new local edge based fast INTRA prediction mode decision method is also adopted to boost the encoding efficiency. Simulation results confirm that with the proposed methods the computational burden of a traditional transcoder can be reduced by 20% ~ 30% with only a negligible bit-rate increase for a wide range of video sequences
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