Method of positioning sound image with distance adjustment
US6418226B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1997 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Dec 10, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2420/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sound apparatus is constructed for directing a sound image of a virtual sound source at a designated source point to a listener in a virtual sound field. In the sound apparatus, a database provisionally memorizes acoustic transfer characteristics of the virtual sound field in correspondence to reference source points distributed radially around a center point of the listener. Left and right filters respectively filter audio signals of left and right channels according to the acoustic transfer characteristics loaded from the database. A processor computes a leftward acoustic direction from the designated source point to a left ear of the listener, and computes a rightward acoustic direction from the designated source point to a right ear of the listener. A controller specifies a leftward reference source point coincident with the leftward acoustic direction to load an effective acoustic transfer characteristic corresponding to the leftward reference source point from the database into the left filter, and specifies a rightward reference source point coincident with the rightward acoustic direction to load another effective acoustic transfer characteristic corresponding to the righ…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.