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2008
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An Estimation-Theoretic Interpretation of Video Rate Distortion Optimization with Lagrangian Formulation

9 years 3 months ago
An Estimation-Theoretic Interpretation of Video Rate Distortion Optimization with Lagrangian Formulation
Rate distortion optimization with Lagrangian formulation is widely used in video encoder control and has proved effective in achieving a good trade-off between coding efficiency and computational complexity. It is generally interpreted as a source coding problem with a fidelity criterion. However, this interpretation cannot fully explain the Lagrangian formulation for motion estimation and how to select the corresponding Lagrangian multipliers. In this paper, we provide a new perspective based on an estimation-theoretic interpretation that formulates motion estimation and mode decision as a maximum a posteriori (MAP) estimation problem. Several interesting conclusions can be drawn from this interpretation. We show that the Lagrangian formulation in video encoder control is a straightforward result under this interpretation. With this interpretation, we can further analyze the Lagrangian multiplier's dependence on the quantization parameter and motion intensity of the content.
Zhen Li, Alexis Michael Tourapis
Added 25 Dec 2009
Updated 25 Dec 2009
Type Conference
Year 2008
Where DCC
Authors Zhen Li, Alexis Michael Tourapis
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