MPEG-2 to H.263 transcoder

Nick Feamster; Susie J. Wee

doi:10.1117/12.371200

22 November 1999 MPEG-2 to H.263 transcoder

Nick Feamster, Susie J. Wee

Proceedings Volume 3845, Multimedia Systems and Applications II; (1999) https://doi.org/10.1117/12.371200
Event: Photonics East '99, 1999, Boston, MA, United States

Abstract

We present an MPEG-2 to H.263 transcoder that accepts an interlaced MPEG-2 bitstream as the input and produces a lower-bitrate progressive H.263 bitstream as the output. As both DVD and digital television may use MPEG-2 interlaced sequences, a potential application of such a transcoder is the transmission of a digital television signal over a wireless medium. Another application is transcoding interlaced DVD content for use on lower-resolution thin clients with progressive displays. The proposed algorithm exploits the properties of the MPEG-2 and H.263 compression standards to perform interlaced to progressive (field to frame) conversion with spatial downsampling and frame-rate reduction in a CPU and memory efficient manner, while additionally minimizing picture quality degradation as measured by PSNR. This is the first algorithm to our knowledge that effectively uses both spatial and temporal downsampling in an MPEG-2 to H.263 field to frame transcoder in order to achieve substantial bitrate reduction. This paper discusses recoding experiments used to determine appropriate source and target coding parameters for the transcoder, provides a detailed description of the transcoding algorithm, and describes the performance of a software implementation of the transcoder.

Citation Download Citation

Nick Feamster and Susie J. Wee "MPEG-2 to H.263 transcoder", Proc. SPIE 3845, Multimedia Systems and Applications II, (22 November 1999); https://doi.org/10.1117/12.371200

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