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:
Sep. 21, 1999
Filed:
Oct. 23, 1997
Nobuyuki Aoki, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A playback apparatus prevents the position of a pick-up from deviating to a location outside a data area of a record medium. A system controller judges whether the number of tracks T to be skipped between the current read position and a target sector of a track jump is equal to or greater than a predetermined number. If the number of tracks is equal to or greater than 1,000, for example, the system controller then judges whether a track including the target sector is located within a predetermined range A from the edge of a data area on the medium which corresponds to an error that may result in the track jump. If the track including the target sector is located within the predetermined range from the edge of the data area, the system controller subtracts A from the number of tracks T to be skipped in the track jump resulting in a new number of tracks T-A. The track jump is executed by skipping (T-A) tracks while the tracking and thread servos are halted.