The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 1989
Filed:
Dec. 18, 1986
Shoji Nemoto, Kanagawa, JP;
Noboru Murabayashi, Tokyo, JP;
Sony Corporation, Tokyo, JP;
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.