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Speeding up the optimization of the rate distortion performance in MPEG-2 video coding through quantizer loop parameterization

Grecos, Christos and Saparon, Azilah (2003) Speeding up the optimization of the rate distortion performance in MPEG-2 video coding through quantizer loop parameterization. Proceedings of SPIE - The International Society for Optical Engineering, 5022. pp. 284-288. ISSN 0277-786X

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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.

Item Type: Article
Subjects: Q Science > QA Mathematics > Electronic computers. Computer science
T Technology > T Technology (General) > Information Technology > Electronic computers. Computer science

Q Science > QA Mathematics > Computer software
T Technology > T Technology (General) > Information Technology > Computer software
Divisions: School of Computing > Staff Research and Publications
Depositing User: CAOIMHE NI MHAICIN
Date Deposited: 07 Mar 2019 17:31
Last Modified: 07 Mar 2019 17:31
URI: http://trap.ncirl.ie/id/eprint/3733

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