High band excitation signal generation

Abstract

A method includes extracting a voicing classification parameter of an audio signal and determining a filter coefficient of a low pass filter based on the voicing classification parameter. The method also includes filtering a low-band portion of the audio signal to generate a low-band audio signal and controlling an amplitude of a temporal envelope of the low-band audio signal based on the filter coefficient. The method also includes modulating a white noise signal based on the amplitude of the temporal envelope to generate a modulated white noise signal and scaling the modulated white noise signal based on a noise gain to generate a scaled modulated white noise signal. The method also includes mixing a scaled version of the low-band audio signal with the scaled modulated white noise signal to generate a high-band excitation signal that is used to generate a decoded version of the audio signal.

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Technology	Declaration Information			Specification Information	Explicitly Disclosed	Patent Type
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5G,4G	12/03/2020	ISLD-202003-021	QUALCOMM INC	S1 TS Number: TS 126 250 Version No: Illustrative part: ---- Release: S2 TS Number: TS 126 251 Version No: Illustrative part: ---- Release: S3 TS Number: TS 126 253 Version No: Illustrative part: ---- Release: S4 TS Number: TS 126 258 Version No: Illustrative part: ---- Release: +3 -3	No	Family Member

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