Tape address adjusting apparatus for video tape recorder

Details Tape address adjusting apparatus for video tape recorder Tape address adjusting apparatus for video tape recorder

1984-06-12

1986-12-30

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

G11B 1552

Patent

active

046333410

ABSTRACT:
A tape synchronizing apparatus for synchronizing tape addresses corresponding to tape locations of a tape which is being played back and reference addresses produced in the apparatus. The apparatus includes a capstan for rotating the tape at a controllable speed and a circuit for producing the tape addresses. The tape address generator circuit includes a circuit for detecting the direction of movement of the tape being played back, a shaping circuit for detecting a control signal from the tape which indicates each successive address and an up-down counter for producing the actual tape addresses. The reference addresses are produced in a reference address counter. The reference addresses are produced and updated at a rate corresponding to the frequency of a frequency reference. The clock rate of the frequency reference is adjustable by means of a frequency dividing circuit. The reference addresses and the tape addresses are compared and an acceleration or deceleration signal to the capstan driving means of the tape is generated for synchronizing the tape addresses with the reference addresses.

REFERENCES:
patent: 4267564 (1981-05-01), Flores
patent: 4288823 (1981-09-01), Yamamoto et al.
patent: 4358798 (1982-11-01), Hedlund et al.
patent: 4394694 (1983-07-01), Ninomiya et al.
patent: 4450490 (1984-05-01), Fujii et al.
patent: 4507691 (1985-03-01), Ishiguro et al.

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