Dynamic quantization method for encoding data streams
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United States of America Patent
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Issued Date -
Jan 8, 2015
app pub date -
Dec 21, 2012
filing date -
Jan 17, 2012
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Abstract
The present invention relates to a method of dynamic quantization of a stream of images including blocks (210) of different types transposed into the transform domain, the method comprising a first step of quantization (201) of several of said blocks with initial quantization coefficients (211), the method comprising a step of determination (202), for several types of block respectively, of the residual encoding costs after said first quantization (201), and a second step of quantization (204) of the transposed blocks (210) of at least one type with quantization coefficients chosen (203) according to the distribution of said residual costs between several types of block. The invention applies to encoders comprising a step of quantization capable of applying different quantization coefficients according to the types of block of images to be encoded.
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