公开(公告)号：SI2954523T1

公开(公告)日：2019-04-30

申请号：SI201331369

申请日：2013-08-06

Applicant: QUALCOMM INC

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

IPC: G10L21/00 ,  G10L19/00

公开(公告)号：SG11201505067TA

公开(公告)日：2015-08-28

申请号：SG11201505067T

申请日：2013-08-06

Applicant: QUALCOMM INC

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

IPC: G10L21/0208 ,  G10L19/07 ,  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.

公开(公告)号：CA2896814A1

公开(公告)日：2014-08-14

申请号：CA2896814

申请日：2013-08-06

Applicant: QUALCOMM INC

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

IPC: G10L21/0208 ,  G10L19/07 ,  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.

公开(公告)号：AU2013377885B2

公开(公告)日：2019-07-18

申请号：AU2013377885

申请日：2013-08-06

Applicant: QUALCOMM INC

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

IPC: G10L21/0208 ,  G10L19/07 ,  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.

公开(公告)号：ES2711524T3

公开(公告)日：2019-05-06

申请号：ES15716340

申请日：2015-03-31

Applicant: QUALCOMM INC

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

IPC: G10L19/24

Abstract: Un procedimiento para generación de señal de excitación de banda alta que comprende: determinar, en un dispositivo, una clasificación de sonoridad de una señal de entrada, en el que la señal de entrada corresponde a una señal de audio; controlar una envolvente de una señal de excitación de la señal de entrada basándose en la clasificación de sonoridad, en el que el intervalo de frecuencia de la envolvente se controla basándose en una frecuencia de corte de un filtro de paso bajo aplicado a la señal de excitación de la señal de entrada; modular una señal de ruido blanco basándose en la envolvente controlada; y generar una señal de excitación de banda alta basándose en la señal de ruido blanco modulada.

公开(公告)号：SI3138096T1

公开(公告)日：2019-03-29

申请号：SI201530598

申请日：2015-03-31

Applicant: QUALCOMM INC

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

IPC: G10L19/00

公开(公告)号：DK2954523T3

公开(公告)日：2019-03-25

申请号：DK13753450

申请日：2013-08-06

Applicant: QUALCOMM INC

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

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

公开(公告)号：AU2014337537C1

公开(公告)日：2018-02-01

申请号：AU2014337537

申请日：2014-10-14

Applicant: QUALCOMM INC

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

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：SG11201607703PA

公开(公告)日：2016-11-29

申请号：SG11201607703P

申请日：2015-03-31

Applicant: QUALCOMM INC

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

IPC: G10L19/24

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.

公开(公告)号：SG11201601783YA

公开(公告)日：2016-04-28

申请号：SG11201601783Y

申请日：2014-10-14

Applicant: QUALCOMM INC

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

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.