Sensor array post-filter for tracking spatial distributions of signals and noise
US7626889B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2007 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Nov 29, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/86
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A “Sensor Array Post-Filter” provides an adaptive post-filter that accurately models and suppresses both diffuse and directional noise sources as well as interfering speech sources. The post-filter is applied to an output signal produced by a beamformer used to process signals produced by a sensor array. As a result, the Sensor Array Post-Filter operates to improve the signal-to-noise ratio (SNR) of beamformer output signals by providing adaptive post-filtering of the output signals. The post-filter is generated based on a generative statistical model for modeling signal and noise sources at distinct regions in a signal field that considers prior distributions trained to model an instantaneous direction of arrival for signals captured by sensors in the array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.