Sound collecting apparatus, correction method of input signal of sound collecting apparatus, and mobile equipment information system
US9674607B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 28, 2014 |
| Grant date | Jun 6, 2017 |
| Priority date | — |
| Expiry date | Jan 28, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A small-signal power acquisition unit defines a threshold for each of a plurality of input signals based on a long-term average of a minimum power of the corresponding input signal, each of the input signals being obtained by a microphone, sets a power value of each input signal that is smaller than the corresponding defined threshold to be a small-signal power of the input signal. A correction amount setting unit obtains each correction amount for correcting the input signals based on the small-signal power of the corresponding input signal. A correction unit corrects each of the input signals based on each of the correction amounts for correcting the input signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.