Vehicle-carried sound reproduction apparatus
US6498856B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2000 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | May 8, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A vehicle-carried sound reproduction system which reproduces a sound image forwardly of a passenger of a vehicle in which it is incorporated. The vehicle-carried sound reproduction apparatus includes a correction filter circuit for converting input digital audio signals XL(Z) and XR(Z) for left and right channels into digital audio signals YL(Z) and YR(Z) represented respectively by where FLL(Z), FLR(Z), GLL(Z), and GLR(Z) represent head transfer functions. The vehicle-carried sound reproduction system further includes a digital to analog converter circuit for converting the digital audio signals YL(Z) and YR(Z) outputted from the correction filter circuit into analog audio signals. The analog audio signals outputted from the digital to analog converter circuit are supplied to a pair of speakers for the left and right channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.