Method and system for near-end detection
US7536006B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2006 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Jun 4, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system (200) and method (400) for near-end detection of voice (107) in speakerphone mode is provided. The method can include determining (402) a convergence of an adaptive filter (220), determining (404) a dissimilarity between an autocorrelation (311) of an echo estimate (244) and an autocorrelation (312) of a microphone signal (243) if the adaptive filter has converged, computing (406) a weighting factor (279) based on the dissimilarity, applying the weighting factor to a voice activity level (281) to produce a weighted voice activity level (283), comparing (410) the weighted voice activity level to a constant threshold, and performing (412) a muting operation in accordance with the comparing for providing half-duplex communication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.