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Intra MB Prediction Mode Decision Method for Fast MPEG-2 to H.264/AVC Transcoding  

Liu, Xingang (영남대학교 전자정보공학부 미디어통신연구실)
Yoo, Kook-Yeol (영남대학교 전자정보공학부 미디어통신연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.12C, 2008 , pp. 1046-1054 More about this Journal
Abstract
Since the high quality digital TV systems are broadly deployed in the market, the digital video contents will be edited and distributed in MPEG-2 MP@HL fonnat. Due to its impressive coding efficiency, the H.264/AVC codec has rapidly replaced the MPEG-4 SP codec for mobile digital video terminal with low quality. For the bro ad distribution of digitial video contents produced in MPEG-2 format, the MPEG-2 to H.264/AVC transcoding is highly necessary nowadays. In this paper, we propose a fast intra MB prediction mode decision method to reduce the computational complexity in the transcoding, which is the main bottleneck in the transcoders. The proposed method is based on the several relationships such as DCT coefficients and edge orientation, correlation between prediction directions in the $Intra16{\times}16$ and $Intra4{\times}4$ modes, correlation between edge-orientations of luminance an d chrominance components. The simulation results show that the proposed method can reduce the computational complexity upto 70% and 40%, compared with the cascaded transcoder and the well-known fast intraframe transc oder, respectively.
Keywords
MPEG-2; H.264/AVC; Transcoder; Intra MB prediction; Mde decision;
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