System and method for noise reduction in processing speech signals by targeting speech and disregarding noise
US8954320B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 27, 2010 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Apr 26, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/0264
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An exemplary noise reduction system and method processes a speech signal that is delivered in a noisy channel or with ambient noise. Some exemplary embodiments of the system and method use filters to extract speech information, and focus on a subset of harmonics that are least corrupted by noise. Some exemplary embodiments disregard signal harmonics with low signal-to-noise ratio(s), and disregard amplitude modulations that are inconsistent with speech. An exemplary system and method processes a signal that focuses on a subset of harmonics that are least corrupted by noise, disregards the signal harmonics with low signal-to-noise ratio(s), and disregards amplitude modulations that are inconsistent with speech.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.