Noise reduction apparatus and audio output apparatus
US7551743B1 · kind B1 · utility
8Cited by
12References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2000 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Jun 14, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/1661
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The FM broadcast is received and the FM demodulated FM composite signal is stereo demodulated, and when the high band components of the demodulated signal are few, the correction is conducted by using the signals just before and just after the noise generation period, and when the high band components are large, the interpolation is conducted by using a central value calculated from the value of a predetermined period before the noise generation period, and a central value calculated from the value of a predetermined period after the noise generation period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.