Phase control system for a video tape recorder

Details Phase control system for a video tape recorder Phase control system for a video tape recorder

1983-10-04

1987-01-06

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Record editing

360 103, H04N 578

Patent

active

046351370

ABSTRACT:
In a tape recorder, when a magnetic tape changes its transportation speed for special reproduction, either one of a phase reference signal and a magnetic tape transportation phase signal representing the transportation phase of the magnetic tape is delayed by a delay circuit so that the signal not passing therethrough is compared with that having passed through the delay circuit, at which time the delay time of delay circuit is changed corresponding to the transportion speed of the magnetic tape so as to carry out phase control, thereby obtaining the optimum tracking in the reverse normal, double, and triple speed reproduction modes.

REFERENCES:
patent: 3663764 (1972-05-01), Trost et al.
patent: 4127881 (1978-11-01), Wakami et al.
patent: 4456932 (1984-06-01), Honjo et al.
patent: 4463390 (1984-07-01), Koga et al.
patent: 4484235 (1984-11-01), Yokobori et al.
"Microprocessor Controlled Variable Play-Back Speed System for Video Tape Recorder", IEEE Transactions on Consumer Electronics; vol. CE-26, No. 1, Feb. 1980, pp. 121-128.

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