The method and system for efficient restoration of the contents of a high frequency audio

Japanese Patent JP6046169

B2

The present document relates to the technical field of audio coding, decoding and processing. It specifically relates to methods of recovering high frequency content of an audio signal from low frequency content of the same audio signal in an efficient manner. A method for determining a first banded tonality value (311, 312) for a first frequency subband (205) of an audio signal is described. The first banded tonality value (311, 312) is used for approximating a high frequency component of the audio signal based on a low frequency component of the audio signal. The method comprises determining a set of transform coefficients in a corresponding set of frequency bins based on a block of samples of the audio signal; determining a set of bin tonality values (341) for the set of frequency bins using the set of transform coefficients, respectively; and combining a first subset of two or more of the set of bin tonality values (341) for two or more corresponding adjacent frequency bins of the set of frequency bins lying within the first frequency subband, thereby yielding the first banded tonality value (311, 312) for the first frequency subband.

JP6691093	Audio encoders, coding methods and computer programs
JP5283046	Selective scaling mask calculation based on peak detection
JP7413418	Audio decoder for interleaving signals

Teshin, robin
Schugu, michael

JP2014558129A

December 14, 2016

February 22, 2013

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Dolby International Arb

G10L21/0388

JP2008096567A
JP2006503319A
JP2009042734A
JP2007187905A

WO2011071610A1
US20100094638

Tadashige Ito
Tadahiko Ito
Shinsuke Onuki

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