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:
Jun. 13, 2000
Filed:
Jan. 16, 1998
Glenn J Maenza, Glen Mills, PA (US);
Sony Corporation, Tokyo, JP;
Sony Electronics, Inc., Park Ridge, NJ (US);
Abstract
A method for authenticating digital storage devices, including compact discs, CD-Roms, DVDs and floppy discs, is provided. A predetermined 'fingerprint' code is embedded in one or more of the parity bytes which are always appended to the end of data frames for the purpose of detecting and correcting errors in the data frames as they are read from the digital storage devices by playback devices, such as CD players, computers, and DVD players. The 'fingerprint' code is embedded during the mastering process of the originally-produced, authentic storage device by a 'fingerprint' encoder implemented by either hardware or software. The 'fingerprint' is not transferred to target storage devices when the original storage device is copied because standard duplicating equipment do not have the 'fingerprint' encoder which will be used by mastering equipment. If one attempts to use an unauthorized duplicate copy of an authentic storage device, a 'fingerprint' detector in the playback device will detect whether the predetermined 'fingerprint' is present and act accordingly.