Motor-vehicle voice-control system and microphone-selecting method therefor
US8996383B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 2012 |
| Grant date | Mar 31, 2015 |
| Priority date | — |
| Expiry date | Jul 19, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A voice-control system for motor vehicles has a plurality of spaced microphones emitting respective microphone signals, and an evaluation unit connected to the microphones. This unit serves for assembling correlation pairs from the signals of two of the microphones, calculating a correlation coefficient for each correlation pair, detecting an energy value for each microphone, detecting a respective delay time of a voice signal between a voice signal source and the each of the microphones, and selecting in dependence on current correlation coefficients of the correlation pairs, on the current energy values of the microphones, and on the current delay time of the voice signal to the microphones, that microphone whose signal is optimal as a basis for the operation of the voice-control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.