BibTeX
@MISC{Lagendijk_correspondence,
author = {R. L. Lagendijk and E. D. Frimout and J. Biemond and Philips Consumer Electronics},
title = {Correspondence},
year = {}
}
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Abstract
The transcoding of MPEG video streams is important in a variety of situations such as in rate reduction for small bandwidth downstream channels and in extracting a fast visual playback stream for digital video cassette recorders. This paper addresses transcoding of MPEG intra-coded frames by selectively copying DCT AC coefficients from the primary MPEG stream into the secondary MPEG stream. A rate-distortion optimal transcoding approach is presented, as well as several computationally more attractive suboptimal approaches. The proposed solutions outperform the more traditional codeword extraction methods from literature.
Keyphrases
mpeg intra-coded frame mpeg video stream rate reduction secondary mpeg stream digital video cassette recorder primary mpeg stream rate-distortion optimal transcoding approach attractive suboptimal approach proposed solution traditional codeword extraction method fast visual playback stream small bandwidth downstream channel dct ac coefficient
