Video signal, speed-change reproducing system
US4342053A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1979 |
| Grant date | Jul 27, 1982 |
| Priority date | — |
| Expiry date | Jul 19, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/783
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video signal, speed-change reproducing system has a tape on which a video signal has been recorded. The tracks are disposed contiguously and obliquely relative to the tape longitudinal direction. The successive tracks are individually recorded by a plurality of rotating heads having gaps of mutually different azimth angles. The tape travels at a selected speed V which is represented by the equation ##EQU1## wherein Vo is the tape speed for normal reproduction (and recording), and n is a positive or negative integer. A pair of rotating reproducing heads have reproducing gaps which are also of the same mutually different azimuth angles that are used for recording. The reproducing heads are adapted to successively scan the tracks of the tape to reproduce the recorded video signal. The centers of the track width of the rotating heads are different in height positions with respect to the rotational planes in which the heads travel. The rotational phase of the reproducing heads are controlled such that each time instant when the level of the reproduce signal becomes a minimum value is within or in the vicinity of a vertical blanking period, and the minimum level of the reproduced signa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.