Sound collection/reproduction method and device
US8116479B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2006 |
| Grant date | Feb 14, 2012 |
| Priority date | — |
| Expiry date | Feb 9, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2400/15
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To provide a sound collection system using a plurality of microphones arranged in the proximity to one another and having an excellent directivity for an arbitrary position in the sound field space. A plurality of control points are set around a plurality of sound collecting microphones. A desired response function matrix A (ω) and a transfer function matrix C (ω) between the control points and the respective microphones are measured. A control filter H arranged in a digital signal processing unit (2) is connected to each of the microphones constituting the sound collection device (1). The control filters H are arranged for the number of output channels of a reproduction unit (4). An output of each of the control filters H is added for each channel and outputted to each channel of the reproduction unit (4). By specifying a microphone directivity upon sound collection at a control point, the control filters H are decided according to the measured desired response function matrix A (ω) and the transfer function matrix C (ω) of the specified control point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.