Yung-ki Lee, School of Computer Engineering, Sejong University, 98 Kunja-Dong, Kwangjin-Gu, Seoul, 143-747, Korea. DMS Lab.
Sung-sun Lee, School of Computer Engineering, Sejong University, 98 Kunja-Dong, Kwangjin-Gu, Seoul, 143-747, Korea. DMS Lab.
Yung-lyul Lee, School of Computer Engineering, Sejong University, 98 Kunja-Dong, Kwangjin-Gu, Seoul, 143-747, Korea. DMS Lab.
In this paper, a temporal resolution reduction transcoding method that transforms an MPEG-4 video bitstream into an H. 264 video bitstream is proposed. The block mode statistics and motion vectors in the MPEG-4 bitstream are utilized in the H. 264 encoder for block mode conversion and motion vector interpolation methods. The proposed motion vector interpolation methods are developed not to perform brute-force motion estimation again in the H. 264. In the experimental results, the proposed methods achieve 3~4 times improvement in computational complexity compared to the cascade pixel-domain transcoding, while the PSNR (peak signal to noise ratio) is degraded with 0.2~0.9dB depending on the bitrates.
Citation:
Yung-ki Lee, Sung-sun Lee, Yung-lyul Lee, "MPEG-4 to H.264 Transcoding using Macroblock Statistics," icme, pp.57-60, 2006 IEEE International Conference on Multimedia and Expo, 2006
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