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:
Dec. 21, 1999
Filed:
Nov. 18, 1996
Nobutoshi Takayama, Yokohama, JP;
Shuya Tanaka, Kawasaki, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
An information signal reproducing apparatus for reproducing information signals from a recording medium in which a pilot signal component having a predetermined frequency is superimposed on the information signals at every other track of a plurality of parallel tracks. A tracking error signal is formed from pilot signal crosstalk from tracks in which the pilot signal component is not superimposed. The tracking error signal is modified using the signal on which the pilot signal component is superimposed. To facilitate such a modification, no pilot signal is superimposed in a second area of the track in which the pilot signal component is superimposed in a first area thereof, and the pilot signal is superimposed in the second area of the track in which no pilot signal component is superimposed in the first area thereof.