Audio system and audio interface
US6754354B1 · kind B1 · utility
9Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 14, 2000 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Aug 14, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/00818
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Audio systems using a digital audio interface between a sender and a receiver are known. Due to the digital revolution, it is very easy to make copies of copyright protected work. By using a bi-directional control bus in the audio interface, it is made possible to send audio signals with a standard quality to “normal” receivers audio, and higher quality audio to receivers which are authorized to receive higher quality audio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.