Device for modifying program duration on a tape player

Details Device for modifying program duration on a tape player Device for modifying program duration on a tape player

1986-11-26

1987-12-29

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Manual input recording

360 103, 360 70, 360 73, H04N 578, G11B 2104, G11B 1552

Patent

active

047164735

ABSTRACT:
An apparatus for modifying the playing time of a program including a signal converter (1) for converting a signal (S.sub.1) corresponding to the difference between the time content and the desired playing time of a program to a tape-speed-varying signal (.DELTA.T.sub.D) and a reference-signal-varying signal (.DELTA.T.sub.p). The tape-speed-varying signal controls a delay (5) of a detected capstan signal (T.sub.D). The delayed and nondelayed capstan signal are phase compared (4) to produce a speed control voltage. The tape-speed-varying signal varies the frequency of the capstan reference signal (T.sub.P) in a reference signal generator (2). The capstan reference signal is then phase compared (3) with a signal regenerated from the control track of the tape to produce a phase control voltage. An adder (6) adds the speed and phase control voltages to produce a signal to drive the capstan motor.

REFERENCES:
patent: 3939490 (1976-02-01), Opett
patent: 4037260 (1977-07-01), Busby, Jr. et al.
patent: 4206485 (1980-06-01), Sakamoto
patent: 4318140 (1982-03-01), Shigeta
patent: 4358798 (1982-11-01), Hedlund et al.
patent: 4393415 (1983-07-01), Huist
patent: 4463390 (1984-07-01), Koga et al.
patent: 4611252 (1986-09-01), Igata et al.

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