公开(公告)号：PH12016500600A1

公开(公告)日：2016-06-13

申请号：PH12016500600

申请日：2016-04-04

Applicant: QUALCOMM INC

Inventor： ATTI VENKATRAMAN S ,  VENKATESH KRISHNAN ,  PIERRE VILLETTE STEPHANE ,  VIVEK RAJENDRAN

IPC: G10L21/038 ,  G10L19/083

Abstract: A method includes determining a first modeled high-band signal based on a low-band excitation signal of an audio signal, where the audio signal includes a high-band portion and a low-band portion. The method also includes determining scaling factors based on energy of sub-frames of the first modeled high-band signal and energy of corresponding sub-frames of the high-band portion of the audio signal. The method includes applying the scaling factors to a modeled high-band excitation signal to determine a scaled high-band excitation signal and determining a second modeled high-band signal based on the scaled high-band excitation signal. The method includes determining gain parameters based on the second modeled high-band signal and the high-band portion of the audio signal.

公开(公告)号：PH12016502137A1

公开(公告)日：2017-02-06

申请号：PH12016502137

申请日：2016-10-26

Applicant: QUALCOMM INC

Inventor： KUMAR RAMADAS PRAVIN ,  SINDER DANIEL J ,  PIERRE VILLETTE STEPHANE

IPC: G10L19/24

Abstract: A particular method includes determining, at a device, a voicing classification of an input signal. The input signal corresponds to an audio signal. The method also includes controlling an amount of an envelope of a representation of the input signal based on the voicing classification. The method further includes modulating a white noise signal based on the controlled amount of the envelope. The method also includes generating a high band excitation signal based on the modulated white noise signal.

公开(公告)号：PH12015501516A1

公开(公告)日：2015-09-21

申请号：PH12015501516

申请日：2015-07-03

Applicant: QUALCOMM INC

Inventor： SRINIVASA ATTI VENKATRAMAN ,  VENKATESH KRISHNAN ,  VIVEK RAJENDRAN ,  PIERRE VILLETTE STEPHANE

IPC: G10L19/07 ,  G10L21/0208 ,  G10L19/24 ,  G10L21/0216 ,  G10L21/0388

Abstract: A particular method includes determining, based on spectral information corresponding to an audio signal that includes a low-band portion and a high-band portion, that the audio signal includes a component corresponding to an artifact-generating condition. The method also includes filtering the high-band portion of the audio signal and generating an encoded signal. Generating the encoded signal includes determining gain information based on a ratio of a first energy corresponding to filtered high-band output to a second energy corresponding to the low-band portion to reduce an audible effect of the artifact-generating condition.