Noise canceler system with adaptive cross-talk filters
US6700976B2 · kind B2 · utility
2Cited by
4References
12Claims
0Family size
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Key dates
| Filing date | May 3, 2001 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Aug 20, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/02165
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A known cross-talk adaptive noise cancellation apparatus uses two adaptive filters for suppressing the correlated noise in the main signal, which contains wanted voice and unwanted noise, by a reference signal, which contains unwanted noise and wanted voice via cross-talking. A noise canceler is provided in the present invention including some additional parts, such as a voice detection circuitry and a step size decision circuitry. The voice detection circuitry detects whether the wanted voice exists. The step size decision circuitry decides what the step sizes are used for the next update of the two adaptive filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.