Videorecorder with rotating head drum and video heads

Details Videorecorder with rotating head drum and video heads Videorecorder with rotating head drum and video heads

1989-01-30

1990-04-03

Faber, Alan

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

360 70, G11B 2104, H04N 5782

Patent

active

049145312

ABSTRACT:
The invention concerns a videorecorder with a rotating head drum (KT) that has video heads (K1 & K2) with a magnetic tape (B) looped partly around them mounted on it, with at least one pulse generator (M) mounted on the head drum, with at least one sensor (S) that generates a head-shift signal that switches from one video head to the other, and with a control head (KK) for scanning the vertical-synchronization signal during playback. In the playback mode the time between the signal supplied to the sensor and the vertical-synchronization signal is measured and compared with a reference, and a criterion for controlling the position in time of the head-shift signal is derived from the comparison.

REFERENCES:
patent: 3358080 (1967-12-01), MacLeod
patent: 3401231 (1968-09-01), Baldwin
patent: 3463877 (1969-08-01), Crum
patent: 3838451 (1974-09-01), Mino
patent: 3883890 (1975-05-01), Tanigawa et al.
patent: 4120007 (1978-10-01), Sato
patent: 4343022 (1982-08-01), Tanaka et al.
patent: 4361856 (1982-11-01), Okamoto
patent: 4600953 (1986-07-01), Furuhata et al.
patent: 4706137 (1987-11-01), Tanaka

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