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Macroblock Layer Bit-rates Control Algorithm based on the Linear Source Model  

Seo Dong-Wan (Department of Electrical & Electronics Engineering, Yonsei University)
Choe Yoonsik (Department of Electrical & Electronics Engineering, Yonsei University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.42, no.6, 2005 , pp. 63-72 More about this Journal
Abstract
In this paper, we propose the bit-rate control algorithm for the block based image compression like H.263, H.263+ or MPEG-4. The proposed algorithm is designed to identify the quantization parameter set through the Lagrangian optimization technique based on the well-known linear source model. We set the Lagrangian cost function with the rates and distortion calculated from the linear source model. We calculate the quantization parameter set using the Vitervi algorithm to solve the Lagrangian optimization problem considering the Dquant method of H.263 and MPEG-4. The proposed algorithm improves the video quality by up to 1.5 dB compared with the TMN8 scheme, and is more effective in the video sources with dynamic activities than the consistent quality approaches.
Keywords
Lagrangian Optimization; MPEG-4; Rate Control; Viterbi;
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