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:
May. 27, 2008
Filed:
Mar. 26, 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
An input is ciphered in at least one of a sector forming circuit, a scrambling circuit, a header appendage circuit, an error correction encoding circuit, a modulation circuitand a synchronization appendage circuit, used for processing input data for forming a recording signal. Not only key for ciphering itself in the circuits but also the information as to which of the circuits has been used for ciphering becomes the key for ciphering. This realizes ciphering difficult to decode by a simplified structure.