Adaptive binarizer selection for image and video coding
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United States of America Patent
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Nov 27, 2018
Grant Date -
Jun 22, 2017
app pub date -
Dec 18, 2015
filing date -
Dec 18, 2015
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Abstract
Methods and devices for image and video coding using arithmetic coding. The binarization of symbols in an encoder and decoder is adaptive based on changes to the probability distribution as symbols are encoded/decoded. A binarizer may be generated based upon a probability distribution, used to binarize a symbol, and then the probability distribution is updated based on the symbol. Updates to the binarizer may be made after each symbol, after a threshold number of symbols, or once the updated probability distribution differs by more than a threshold amount from the probability distribution used in generating the current binarizer. The probability distributions may be context-specific.
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