Video disc player having improved squelch system
US4484174A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1982 |
| Grant date | Nov 20, 1984 |
| Priority date | — |
| Expiry date | Jan 7, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Dual squelch circuits, the first preceding and the second following the video processor of a video disc player, are selectively activated by a control unit which receives transducer position information from the processor for calculation of disc playing time and control of the signal recovery transducer. The first squelch circuit aids in stabilizing the timebase correction servo of the video processor during the player pause operating mode. The second squelch circuit maintains video blanking during certain player transition operating modes (e.g., pause-to-play, load, etc.) while the control unit processes the position information to provide transducer control and playing time indicator signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.