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Proceedings Paper

Speeding up the optimization of the rate distortion performance in MPEG-2 video coding through quantizer loop parameterization
Author(s): Christos Grecos; A. Saparon
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Paper Abstract

A simple scheme for fast Rate Distortion optimization based on Lagrange multipliers is presented in this paper. It is based on the observation that for accurate target rates, the change of the multiplier alone may not have an effect for small step sizes. However, a combination of small step sizes alogn with appropriate quantizer loop parameterization may solve this problem thus result in in significant computaiotnal savings since only a portion of the Rate distortion characteristics need to be considered for optimization. Extensive experiments using quantizer loop parameterization reveal savings between 60.14 and 92.94% for the rate bounding case and between 56.48 and 91.01% for the bisection search for a wide variety of video sequences exhibiting different characteristics.

Paper Details

Date Published: 7 May 2003
PDF: 5 pages
Proc. SPIE 5022, Image and Video Communications and Processing 2003, (7 May 2003); doi: 10.1117/12.476434
Show Author Affiliations
Christos Grecos, Loughborough Univ. (United Kingdom)
A. Saparon, Loughborough Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 5022:
Image and Video Communications and Processing 2003
Bhaskaran Vasudev; T. Russell Hsing; Andrew G. Tescher; Touradj Ebrahimi, Editor(s)

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