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:
Jul. 30, 1996
Filed:
Oct. 19, 1994
Takeshi Funahashi, Saitama, JP;
Yoshikatsu Niwa, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A method of accessing a disc-shaped recording medium including the steps of (a) recording defect information on the disc-shaped recording medium including a first logical address data of defective sectors, the first logical address data being a serial logical address data assigned to all sectors including both effective and defective sectors, (b) recording on a predetermined physical location of the disc-shaped recording medium disc information containing recorded physical position information of the defect information which represents a physical data structure, (c) reading out the disc information from the disc-shaped recording medium, (d) reading out the defect information using the physical recorded position information contained in the disc information read out at step (c), (e) generating a first table using the defect information which is used to convert the first logical address data into a second logical address data, the second logical address data being an address data assigned only to the effective sectors, (f) generating a second table using the disc information read out at step (c) which is used to convert the second logical address data into a physical address data of the disc-shaped recording medium, (g) using the first table to convert the first logical address data to be accessed into the second logical address data, (h) using the second table to convert the second logical address data into the physical address data and (i) accessing the disc-shaped recording medium using the physical address data generated at step (h).