Correlation-based method for ambience extraction from two-channel audio signals
US8107631B2 · kind B2 · utility
33Cited by
1References
20Claims
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Key dates
| Filing date | Aug 21, 2008 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | Dec 1, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S3/002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of ambience extraction includes analyzing an input signal to determine the time-dependent and frequency-dependent amount of ambience in the input signal, wherein the amount of ambience is determined based on a signal model and correlation quantities computed from the input signals and wherein the ambience is extracted using a multiplicative time-frequency mask. Another method of ambience extraction includes compensating a bias in the estimation of a short-term cross-correlation coefficient. In addition, systems having various modules for implementing the above methods are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.