Method and system for dereverberation of signals propagating in reverberative environments
US8988970B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2011 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Aug 6, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The dereverberation of signals in reverberating environments is carried out via acquiring the representation (image) of spatial distribution of the signals in space of interest and automatic identification of reflections of the source signal in the reverberative space. The technique relies on identification of prominent features at the image, as well as corresponding directions of propagation of signals manifested by the prominent features at the image, and computation of similarity metric between signals corresponding to the prominent features in the image. The time delays between the correlated signals (i.e., source signal and related reflections) are found and the signals are added coherently. Multiple beamformers operate on the source signal and corresponding reflections, enabling one to improve the signal-to-noise ratio in multi-path environments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.