Tape counter for a rotary head type video signal recording and reproducing apparatus and tape counting method therefor
US5138502A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1990 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Nov 29, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/19
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tape counter for counting an amount of tape by which a tape has run for a video signal recording and reproducing apparatus and method therefor, in which the number of frames on tape tracks over which each rotary head scans are counted according to a change in level of an envelope of a reproduced FM signal detected through each rotary head, the number of rotations of a rotary drum on which the rotary head is mounted is counted, and the amount of tape by which the tape has run is counted on the basis of the number of frames scanned by the rotary head and the number of rotations of the drum. The tape counter detects the amount of tape by which the tape has run in all running modes during a reproduction operation with a high accuracy and displays the amount of tape by which the tape has run in a series of units of hours, minutes, and seconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.