公开(公告)号：ES2643828T3

公开(公告)日：2017-11-24

申请号：ES14796594

申请日：2014-10-14

Applicant: QUALCOMM INC

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

IPC: G10L21/038 ,  G10L19/083

公开(公告)号：NZ724656A

公开(公告)日：2021-12-24

申请号：NZ72465615

申请日：2015-03-31

Applicant: QUALCOMM INC

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

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：NZ717786A

公开(公告)日：2018-05-25

申请号：NZ71778614

申请日：2014-10-14

Applicant: QUALCOMM INC

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

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 higher 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 citation signal. The method includes determining gain parameters based on the second modeled high-band signal and the high-band portion of the audio signal. At least one of the disclosed methods may reduce a dynamic range of gain information provided to an encoder by scaling a modeled high-band excitation signal that is used to calculate the gain information. Scaling the modeled high-band excitation signal in this manner may capture variations in the temporal characteristics from sub-frame-to-subframe and reduce dependence of the gain shape information on temporal changes in the high-band portion of an audio signal.