Apparatus for reproducing video signals at a speed which deviate

Details Apparatus for reproducing video signals at a speed which deviate Apparatus for reproducing video signals at a speed which deviate

1988-06-08

1990-01-23

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 102, G11B 558

Patent

active

048962295

ABSTRACT:
A video recorder which is adapted to reproduce video signals recorded on a record carrier in the form of a tape in tracks which are parallel to each other and which are inclined relative to the longitudinal axis of the record carrier at a speed which deviates from the nominal speed. The video recorder comprises tracking-error detection means for detecting the deviation of the read head from the center of the track to be followed. The generated tracking-error signal is applied to the tape-transport control loop. For the purpose of tracking-error detection a reference-signal generator generates reference signals which form an identification for the track to be followed. For reproduction with a deviating speed these reference signals are generated in such a pattern that this pattern corresponds to the sequence of tracks which the head would scan in the case of a free uniform motion with a constant-tape transport speed which deviates from the nominal speed, so that when such a pattern is generated the tape-speed control will establish a tape-transport speed corresponding to this pattern.

REFERENCES:
patent: 4297733 (1981-10-01), Sanderson
patent: 4439799 (1984-03-01), Haubrich et al.
IEEE-Trans. Consum. Electronics (U.S.A.), vol. CE-26, No. 1, Feb. 1980, Azuma et al., "Microprocessor Controlled Variable Play-Back Speed System for Video Tape Recorder".

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