Reduced resolution MPEG-2 to H.264 transcoder

Hari Kalva; Gerardo Fernández-Escribano; Kelly Kunzelmann

doi:10.1117/12.807336

19 January 2009 Reduced resolution MPEG-2 to H.264 transcoder

Hari Kalva, Gerardo Fernández-Escribano, Kelly Kunzelmann

Proceedings Volume 7257, Visual Communications and Image Processing 2009; 72571V (2009) https://doi.org/10.1117/12.807336
Event: IS&T/SPIE Electronic Imaging, 2009, San Jose, California, United States

Abstract

This paper describes complexity reduction in MPEG-2 to H.264 transcoding with resolution reduction. The methods developed are applicable to transcoding any DCT based video such as MPEG-2, MPEG-4, and H.263 to the recently standardized H.264 video at a reduced resolution. H.264 is being adopted by mobile device industry and devices such as iPod use H.264. The mobile devices, however, need the video at a reduced resolution. The proposed transcoder accelerates the H.264 encoding stage by performing motion estimation for only one block size as determined by the trained decision trees. Our solution allows conversion of MPEG-2 video to the H.264 video format at a reduced resolution with substantially less computing complexity. We use machine learning based approaches to significantly reduce the complexity of this transcoding. Experimental results show a reduction in transcoding time of about 67% (a 3x speedup) with a less than -0.5 dB change in PSNR.

Citation Download Citation

Hari Kalva, Gerardo Fernández-Escribano, and Kelly Kunzelmann "Reduced resolution MPEG-2 to H.264 transcoder", Proc. SPIE 7257, Visual Communications and Image Processing 2009, 72571V (19 January 2009); https://doi.org/10.1117/12.807336

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