Open loop transcoding using perceptually adaptive requantization of DCT coefficients

Francesco Bertagnolli; Matteo  Lanati; Lorenzo Favalli; Francesco Gruppi

2nd International ICST Conference on Mobile Multimedia Communications

Research Article

Open loop transcoding using perceptually adaptive requantization of DCT coefficients

Cite: BibTeX Plain Text

@INPROCEEDINGS{10.1145/1374296.1374345,
    author={Francesco Bertagnolli  and Matteo  Lanati and Lorenzo Favalli and Francesco Gruppi},
    title={Open loop transcoding using perceptually adaptive requantization of DCT coefficients},
    proceedings={2nd International ICST Conference on Mobile Multimedia Communications},
    publisher={ACM},
    proceedings_a={MOBIMEDIA},
    year={2006},
    month={9},
    keywords={component; transcoding video perceptual mode},
    doi={10.1145/1374296.1374345}
}

Francesco Bertagnolli
Matteo Lanati
Lorenzo Favalli
Francesco Gruppi
Year: 2006
Open loop transcoding using perceptually adaptive requantization of DCT coefficients
MOBIMEDIA
ACM
DOI: 10.1145/1374296.1374345

Francesco Bertagnolli ¹, Matteo Lanati¹, Lorenzo Favalli¹, Francesco Gruppi¹

1: University of Pavia, Pavia, Italy

Abstract

With increasing network heterogeneity, adaptive techniques for coding multimedia (and mainly video) signals become mandatory. In this paper we introduce a simple techniques to adapt quantization step size in an open loop transcoder based on a perceptual interpretation of DCT coefficient distribution. Results show that the technique is actually very simple and despite this simplicity, effective in improving the (trans-) coded stream quality.

Keywords: component; transcoding video perceptual mode

Published: 2006-09-20
Publisher: ACM

: http://dx.doi.org/10.1145/1374296.1374345