Tracking control apparatus using pilot signals of different freq

Details Tracking control apparatus using pilot signals of different freq Tracking control apparatus using pilot signals of different freq

1986-12-18

1989-03-21

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Record editing

360 7305, 360 7714, H04M 5783

Patent

active

048149004

ABSTRACT:
In tape transport apparatus for use with an 8-mm video tape recorder having an automatic track following system, during reproduction at a variable tape speed, a tracking error signal formed on the basis of a frequency component of a reproduced pilot signal is sampled and held once per one field. The sampled and held output is compared with a reference value, the running state of the tape is positively identified on the basis of the comparison, and tracking control responsive to the identified running state is carried out. The apparatus has the additional capability of skipping pilot signal frequencies in a quasi-locked state to assist in obtaining a locked state.

REFERENCES:
patent: 4486795 (1984-12-01), Naito
patent: 4594618 (1986-06-01), Kozuki et al.
patent: 4594618 (1986-06-01), Nemoto et al.
patent: 4618899 (1986-10-01), Doutsubo
patent: 4663673 (1987-05-01), Doutsubo
patent: 4680648 (1987-07-01), Takayama
patent: 4682247 (1987-07-01), Doutsubo

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