Automatic tuning apparatus for a video tape recorder
US6002451A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1998 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Dec 18, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/642
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An automatic tuning apparatus is capable of automatically switching a tuning mode of a tuner circuit, automatically arranging various signal data in or after completion of tuning and arbitrarily and automatically arranging various signal data by a user. The apparatus comprises a SYNC discrimination circuit (11) for discriminating whether or not a video signal system is a NTSC system or another system, a tuning mode switching circuit (12) for switching a tuning mode, and a color discrimination circuit (13) for receiving a color burst signal (identic signal) for discriminating whether the video signal system is a system or a SECAM system. As to the NTSC system, the system, the SECAM system and a SECAM-L system, the user may not set the tuning mode of tuning means, whereby an automatic tuning apparatus imposing no burden on the user can be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.