Microphone system for producing signals for quadraphonic reproduction
US4096353A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1976 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Nov 2, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R5/027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system including a compact array of microphones and signal-combining circuitry, especially suited for use with surround-sound sources, for producing two composite output signals corresponding to those required by a matrix-type quadraphonic system to establish the directional position of the sources. The outut signals from one embodiment of the system can be used directly to record an SQ-matrixed tape, or they can be applied to a disc cutter to produce an SQ record, and in another embodiment the output signals can be used directly to record a "regular matrix" (RM) tape or they can be applied to a disc cutter to produce an "RM" record. Thus, the disclosed systems perform the function of the conventional multi-microphone and encoding system for SQ or RM recording or broadcasting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.