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:
Apr. 01, 1997
Filed:
Sep. 16, 1994
Yoshio Sakakibara, Neyagawa, JP;
Makoto Gotou, Nishinomiya, JP;
Matsushita Electric Industrial Co. Ltd., Osaka, JP;
Abstract
An information playback apparatus includes first and second heads which trace a tape on which tracking pilot signals having at least two different frequencies are selectively and periodically recorded with a period of at least 4 tracks, a pilot detector and identifier for generating an identification signal identifying the kind of tracking pilot signal dominantly contained in a playback signal of the first head, and a tracking error detector for detecting and outputting a tracking error signal from tracking pilot signals contained in a playback signal of the second head, wherein tracking control is performed based on the tracking error signal and the identification signal.