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Optimal Quantization Parameter Set for MPEG-4 Bit-Rate Control

Dong-Wan SEO, Seong-Wook HAN, Yong-Goo KIM, Yoonsik CHOE

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Summary :

In this paper, we propose an optimal bit rate control algorithm which is fully compatible with MPEG-4 or H.263+. The proposed algorithm is designed to identify the optimal quantizer set through Lagrangian optimization when used for optimal bit allocation. To find the optimal quantizer set, we make use of the Viterbi algorithm in order to solve the dependency between quantization parameters of each macroblock due to the unique characteristics of MPEG-4 or H.263+. We set the Lagrangian cost function as a cost function of the Viterbi algorithm. We implement the proposed algorithm in MPEG-4 coders and compare its performance to the VM8 and optimal bit rate control algorithm, using independent quantization parameters in the circumstance of a low bit rate.

Publication
IEICE TRANSACTIONS on Communications Vol.E87-B No.11 pp.3338-3342
Publication Date
2004/11/01
Publicized
Online ISSN
DOI
Type of Manuscript
PAPER
Category
Multimedia Systems for Communications" Multimedia Systems for Communications

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