Video tape recorder

Details Video tape recorder Video tape recorder

1980-12-05

1982-11-30

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

G11B 1544

Patent

active

043618561

ABSTRACT:
A video tape recorder of the helical scan type including two rotational video heads which have their phase and speed controlled. The video heads are mechanically displaced by 180.degree. from each other and reproduce the video signal on the magnetic tape. The position of one of the video heads is indicated by PG pulse from a first pulse generator. A second pulse generator provides 2N pulses per revolution of the video heads, where N is an integer. A first divider is reset by the PG pulse, and divides by N the output pulse frequency of the second pulse generator, and adjusts the output phase of the first divider whose phase corresponds to the phase of the video heads. The second divider is also reset by each PG pulse and divides the output pulse frequency of the first divider by 2. Video signals reproduced by the video heads are chosen in accordance with the level of the output pulse from the second divider.

REFERENCES:
patent: 3580992 (1971-05-01), Eguchi et al.

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