Disc player for playing different types of discs which automatically identifies the type of a currently loaded disc
US5177728A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1990 |
| Grant date | Jan 5, 1993 |
| Priority date | — |
| Expiry date | Feb 20, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2583
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disc player capable of playing discs of different types such as: discs where only a digital audio signal is contained in a first frequency band; discs where only an analog audio signal is contained in a frequency band other than the first frequency band; and, discs where digital and audio signals are contained in the first frequency band and the other frequency band. Processing arrangements are further included to determine (according to disc size and/or presence of a table of contents) whether a currently loaded disc is recorded in the same format as a previous disc which was loaded immediately prior thereto, and if the same, playing the currently loaded disc according to the same reproduction settings as those for the previous disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.