Apparatus for releasing a restriction on the recording of an information signal on a recording medium
US4965680A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1988 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Jun 30, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording/reproducing system according to this invention for use in, for example, a digital audio tape recorder is applied to a type in which recording of an input information signal on a recording medium is restricted, and can ensure releasing of the recording restriction by using release-signal-holding mediums on which a release signal for releasing the recording restriction is recorded. In this case, the release signal is affixed with frequency data for restricting the quantity of the information signal to be recorded on recording medium, and this frequency data is updated in such a way that the greater the number of recording the information signal on recording medium, the smaller the recordable quantity of the information signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.