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An Efficient Algorithm for the Conversion of DCT Coefficients to H.264 Transform Coefficients in MPEG-2 to H.264 Transcoding  

Kim, Yong-Jae (가톨릭대학교 대학원 컴퓨터공학과 신호처리 연구실)
Lee, Chang-Woo (가톨릭대학교 정보통신전자공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.8C, 2007 , pp. 729-737 More about this Journal
Abstract
The H.264/AVC video coding standard provides higher coding efficiency compared to the conventional MPEG-2 standard. Since a lot of videos have been encoded using MPEG-2, the format conversion from MPEG-2 to H.264 is essential. In this paper, we propose an efficient method for the conversion of DCT coefficients to H.264/AVC transform coefficients. This conversion is essential, since $8{\times}8$ DCT and $4{\times}4$ integer transform are used in MPEG-2 and H.264/AVC, respectively. The mathematical analysis and computer simulation show that the computational complexity of the proposed algorithm is reduced compared to the conventional algorithm, while the loss caused by the conversion is negligible.
Keywords
Video Transcoding; H.264/AVC; MPEG-2; Integer Transform; Discrete Cosine Transform;
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