Method of detecting a predetermined frequency band in an audio data signal, detection device and computer program corresponding thereto
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United States of America Patent
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Aug 30, 2016
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app pub date -
Dec 11, 2012
filing date -
Dec 20, 2011
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Abstract
A method is provided for detecting a predetermined frequency band in an audio data signal which has previously been coded according to a succession of data blocks, among which at least certain blocks contain respectively at least one set of spectral parameters representing a linear prediction filter. Such a method of detection implements, for a current block among the at least certain blocks and for which at least a plurality of spectral parameters of the set have been previously decoded, acts of: determining, among the plurality of previously decoded spectral parameters, the index of the first spectral parameter closest to a threshold frequency; calculating at least one criterion on the basis of the determined index; and deciding whether the predetermined frequency band is detected in the current block, as a function of the criterion calculated.
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