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. 13, 2005
Filed:
Aug. 21, 2002
Yoichiro Sako, Chiba, JP;
Isao Kawashima, Kanagawa, JP;
Akira Kurihara, Kanagawa, JP;
Yoshitomo Osawa, Kanagawa, JP;
Hideo Owa, Kanagawa, JP;
Yoichiro Sako, Chiba, JP;
Isao Kawashima, Kanagawa, JP;
Akira Kurihara, Kanagawa, JP;
Yoshitomo Osawa, Kanagawa, JP;
Hideo Owa, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A data reproducing apparatus and method is provided for reproducing data that was ciphered during recording in one or more of sector forming, header appending, error correction coding, modulation, and synchronization appending operations used for processing input data to form a recording signal. Thus, deciphering requires knowledge of both the ciphering key and the aspect(s) of the recording operation in which the ciphering took place. The deciphering may also include a descrambling operation in which an initial value and/or a generating polynomial is varied in accordance with ciphering key information.