Ambience extraction from stereo signals based on least-squares approach
US9928842B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2016 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Sep 23, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2400/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.