Echo suppression with increment/decrement, quick, and time-delay counter updating
US7643630B2 · kind B2 · utility
5Cited by
6References
8Claims
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Key dates
| Filing date | Jun 24, 2005 |
| Grant date | Jan 5, 2010 |
| Priority date | — |
| Expiry date | Sep 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/082
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Hands-free phones with voice activity detection using a comparison of frame power estimate with an adaptive frame noise power estimate, automatic gain control with fast adaptation and minimal speech distortion, echo cancellation updated in the frequency domain with stepsize optimization and smoothed spectral whitening, and echo suppression with adaptive talking-state transitions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.