Method for choosing rate control parameters in motion-compensated transform-based picture coding scheme using non-parametric technique
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United States of America Patent
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Sep 18, 2001
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app pub date -
Jun 21, 1996
filing date -
Jun 21, 1996
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Abstract
A method of assigning quantization values for use during the compression of images is disclosed. The method includes constructing a non-parametric model during a training phase based on relationships between image characteristics, quantization values, and required bit resources to encode images. The model is built by considering a wide sample of images. The consideration includes determining the temporal and spatial characteristics of the images, compressing the images over a range of quantization values, and recording the resultant required bit resource on a per characterization/quantization level basis. Once built, the model may be used during real time compression by determining the characteristics of the input image and using the allocated resource to find a corresponding match in the non-parametric model. The associated quantization value is then assigned to the input image.
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