Noise eliminating apparatus
US8180068B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2006 |
| Grant date | May 15, 2012 |
| Priority date | — |
| Expiry date | Apr 9, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/02165
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A noise eliminating apparatus includes a first microphone, a second microphone and a signal processing unit, the signal processing unit includes a linear prediction filter and a noise resynthesis filter, the linear prediction filter receives an output signal of the first microphone, predicts the output signal of the first microphone by linear prediction and generates a prediction signal, and the noise resynthesis filter is an adaptive filter which receives, as a main input signal, a first difference signal obtained by subtracting one of the output signal of the first microphone and the prediction signal from the other, receives, as an error signal, a second difference signal obtained by subtracting one of an output signal of the second microphone and an output signal of the noise resynthesis filter itself from the other, and updates a filter coefficient so that the error signal is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.