Sound field control device
US5027687A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1989 |
| Grant date | Jul 2, 1991 |
| Priority date | — |
| Expiry date | Oct 5, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S84/26
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sound field control device is capable of producing a sound field effect tone which has a tonal effect providing a listener with a feeling of presence and includes a sound field effect tone generation circuit for generating a sound field effect tone on the basis of sound field information supplied from a source. The sound field effect tone is sounded simultaneously with reproduction of the source signal and a reproduced sound field produced on the basis of the source signal is controlled by this sound field effect tone. In one aspect of the invention, the sound field effect tone generation circuit includes a convolution operation circuit which subjects a signal derived from left and right signals from the source signal to convolution operation with sound field data derived on the basis of the sound field information from the source signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.