Controller for a videotape recorder, and a method therefor

Details Controller for a videotape recorder, and a method therefor Controller for a videotape recorder, and a method therefor

1982-07-28

1984-09-25

Gruber, Felix D.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 143, G11B 2710

Patent

active

044738536

ABSTRACT:
An improved controller for a VTR is disclosed. The VTR has a time code reader and a tape time reader, each generating a signal representative of the time length of the material recorded on the tape. The time code reader generates a signal derived from the time code recorded on the tape. The tape time reader generates a signal derived from the signals generated by a tachometer, connected to the tape transport mechanism. An interpolated time code is generated by means which adds an offset value to this tachometer derived time data. The offset value is periodically calculated by means which determines the difference between the time code data and the tachometer time code data after first determining that the tape speed has exceeded a predetermined threshold speed for a predetermined period of time. If the tape speed has not exceeded this predetermined threshold speed, then the last calculated offset is added to the tachometer derived data.

REFERENCES:
patent: 4134130 (1979-01-01), Tachi
patent: 4157488 (1979-06-01), Allan
patent: 4195317 (1980-03-01), Stratton
patent: 4195319 (1980-03-01), Ida
patent: 4360841 (1982-11-01), Mita
patent: 4360843 (1982-11-01), Menezes et al.
patent: 4363048 (1982-12-01), Tanaka et al.

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