Invention Grant
- Patent Title: High band excitation signal generation
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Application No.: US15611706Application Date: 2017-06-01
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Publication No.: US10297263B2Publication Date: 2019-05-21
- Inventor: Pravin Kumar Ramadas , Daniel J. Sinder , Stephane Pierre Villette , Vivek Rajendran
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: Qualcomm Incorporated
- Current Assignee: Qualcomm Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Toler Law Group, P.C.
- Main IPC: G10L19/08
- IPC: G10L19/08 ; 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.
Public/Granted literature
- US20170270942A1 HIGH BAND EXCITATION SIGNAL GENERATION Public/Granted day:2017-09-21
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