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. 02, 2003
Filed:
Mar. 16, 2000
Osamu Ishizaki, Makabe-gun, JP;
Shigeo Fujitani, Mishima-gun, JP;
Hitachi Maxell Ltd., Ibaraki, JP;
Abstract
An information recording medium has such error detecting codes that the distance between the codes of adjacent tracks of the medium is always 1. The bits E -E of the detecting codes, which are included by pre-format information, are generated as data trains of parity check bits constructed by dividing the bits S -S of the sector numbers and the bits T -T of the track numbers. If the generated detecting codes are compared between adjacent, tracks, the distance between the codes is always 1. Consequently, when the detecting codes of a desired track are read out, substantially no cross talk occurs from the detecting codes of the adjacent tracks. Therefore, even if the recording medium has a narrow track pitch, it is possible to reliably and accurately detect the errors of address data of the medium.