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Adapting Model for Convergence of Optimal MINMAX Bit Allocation in INTRA-Frame Video Coding

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1 Author(s)
Ferguson, K.L. ; CSIR, Meraka Inst. Pretoria, Tshwane

The application of optimal bit allocation in real-time video encoders is a challenging prospect for dependent macroblocks (MBs) where a quantiser is ascribed to each MB within a frame. The operational rate-distortion (R-D) convex hull of INTRA encoded frames may be approximated with a power-law function. However, discontinuities on the surface produce local divergence and therefore an adapting model is proposed that switches between power-law prediction and the bisection method to impose convergence. A performance comparison is made between the bisection method and this adapting model algorithm as applied to the H.263+ video encoder.

Published in:

Broadband Communications, Information Technology & Biomedical Applications, 2008 Third International Conference on

Date of Conference:

23-26 Nov. 2008

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