Estimation of time delay of arrival for microphone arrays
US9319787B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2013 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | May 30, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The accuracy and computationally efficient estimation of time different (or delay) of arrival (TDOA) data is improved for localization of a sound. In one aspect, for each acoustic source event, multiple sets of TDOA data are generated, where each set uses a different sensor or microphone to be the reference. One of the microphones is ultimately selected to be the reference microphone based, in part, on correlation functions of the various sets of TDOA data. The selected reference microphone is then used in sound source localization or other signal processing applications. The direction of the sound source is found using a VMRL finding algorithm as a function of a channel vector containing information of the selected channels, the reference channel and a TDOA vector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.