Automotive audio reproducing apparatus
US6501843B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2001 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | Sep 12, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An automotive audio reproducing apparatus according to the present invention comprises: a sound image position correction circuit 52 for converting a left-channel input digital audio signal XL(Z) and a right-channel input digital audio signal XR(Z) into a digital audio signal YL(Z) and a digital audio signal YR(Z), respectively, for output expressed by:YL(Z)·GLL(Z)+YR(Z)·GLR(Z)=XL(Z)·FLL(Z)+XR(Z)·FLR(Z)YR(Z)·GLL(Z)+YL(Z)·GLR(Z)=XR(Z)·FLL(Z)+XL(Z)·FLR(Z)where FLL(Z) to GLR(Z) are given head related transfer functions; a depth correction circuit 53 for adding reflected sound signals to the signals YL(Z) and YR(Z), respectively; a D/A converter circuit 6 for subjecting output signals of the correction circuit 53 to D/A conversion; and a level control circuit 522 for controlling level of a difference signal in the sound image position correction circuit 52; whereby analog audio signals outputted from the D/A converter circuit 6 are supplied to a left-channel speaker and a right-channel speaker, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.