Video tape recorder carrying out field extraction recording and/or reproduction of a video signal
US5594596A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1995 |
| Grant date | Jan 14, 1997 |
| Priority date | — |
| Expiry date | Jun 2, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/783
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A time lapse VTR carrying out field extraction recording includes a gate for extracting intermittently a supplied video signal at a ratio of one field to every three fields, a switching circuit for designating selectively a tape running speed of either 1/9 or 1/12 the tape running speed of a SP mode in the VHS system, and a servo control circuit for driving a capstan motor to run a magnetic tape at the designated tape running speed. The video signal extracted intermittently by the gate circuit is recorded at an azimuth angle differing from each field by a plurality of video heads on a magnetic head running at the designated tape running speed. As a result, the reproduction compatibility of a magnetic tape having field extraction recorded by a time lapse VTR with an EP mode of a conventional VTR of the VHS system is ensured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.