Invention Application
- Patent Title: AMBIENCE EXTRACTION FROM STEREO SIGNALS BASED ON LEAST-SQUARES APPROACH
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Application No.: US15275312Application Date: 2016-09-23
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Publication No.: US20180090150A1Publication Date: 2018-03-29
- Inventor: Juha O. Merimaa , Bruce C. Po , Adam E. Kriegel
- Applicant: Apple Inc.
- Main IPC: G10L19/008
- IPC: G10L19/008 ; H04S7/00

Abstract:
Ambience extraction from a multichannel input signal is provided. The multichannel input signal is converted into a time-frequency representation. A cross-correlation coefficient is computed for each time and frequency in the time-frequency representation of the multichannel input signal. An autocorrelation is computed for each time and frequency in the time-frequency representation of the multichannel input signal. Using the cross-correlation coefficient and the autocorrelation, ambience extraction coefficients including crosstalk and same-side coefficients are computed as a function of a tuning parameter, the crosstalk coefficients being proportional to the tuning parameter and the tuning parameter being between a value of 0 and a value of 1. The ambience extraction coefficients are applied to extract a left ambience component and a right ambience component.
Public/Granted literature
- US09928842B1 Ambience extraction from stereo signals based on least-squares approach Public/Granted day:2018-03-27
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