Search system for helical scan digital data reproduction apparat

Details Search system for helical scan digital data reproduction apparat Search system for helical scan digital data reproduction apparat

1990-12-31

1993-12-28

Robertson, David L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 744, 360 49, G11B 1518

Patent

active

052745139

ABSTRACT:
A helical scan digital data reproduce apparatus of the invention provides absolute searching of a desired program with the program numbers recorded on a helical track during travelling a recording medium at a high seed in the fast-forward or rewinding mode because the apparatus calculates the program number by counting the index signals recorded on a fixed track during searching. If the program number has not been detected because just after putting a cassette tape, the apparatus once reproduce the magnetic tape to read the program number before winding the magnetic tape.

REFERENCES:
patent: 3851116 (1974-11-01), Cannon
patent: 4367499 (1983-01-01), Hoshino
patent: 4707749 (1987-11-01), Nishijima et al.
patent: 5016119 (1991-05-01), Ogawa et al.
Dare et al., Rotating Digital Audio Tape (R-Dat): A Format Overview, SMPTE J., Oct. 1987, pp. 943-948.

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