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이강준(Kangjun Lee),김정준(Jeongjun Kim),정제창(Jechang Jeong) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.4
Recently, for satisfying many application demands such as coding delay, computing power, transporting channel characteristic, etc, many profiles are supported in video coding standards. Therefore, in transcodingbetween same standards or between other standards, the functional difference of profiles supported by application occur many problems. In this paper, transcoding MPEG-2 main profile to H.264/AVC baseline profile which has restriction in the number of reference frame is focused. In this case, the bidirectionalprediction supported in MPEG-2 main profile is not supported in H.264/AVC baseline profile. Also, in the restriction of reference frame, motion vectors in the MPEG-2 decoder as predictor should be adjusted. In this paper, the proposed algorithm is based onthe characteristic of which motion vector is uniform according to the distance from reference frame. The adaptive search techniques through the determination of the uniformityextremely reduce the computational complexity.