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:
Mar. 02, 1999
Filed:
Oct. 24, 1994
Erik Christian Schylander, Eindhoven, NL;
Jos G Schepers, Hasselt, BE;
Gerrit D Westerhout, Eindhoven, NL;
Adrianus H Dieleman, Dordrecht, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A record carrier having at least two information volumes recorded thereon. The first volume includes control information for use in searching for information included in that volume. In one embodiment, the first volume further includes a reference to the control information included therein in a predetermined address range, and the second volume includes substitute control information for use in searching for information in the first and second volumes and a reference to the substitute control information. The reference to the substitute control information is accommodated in a recoverable substitute address range. A reading apparatus for such a record carrier transforms a request for access to sectors in the predetermined address range of the first volume into a request for access to sectors in the substitute address range of the second volume. A method and apparatus for recording information on such a record carrier is also disclosed. In other embodiments, the first and second volumes each include a lead-out signal denoting the end of the volume it is included in, and/or the second volume includes additional control information for searching for information included in the second volume (and, possibly, the first volume). If appropriate, the lead-out signal of the second information volume references (indirectly) the additional control information.