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:
Feb. 03, 2009
Filed:
Mar. 23, 2006
Yoichiro Sako, Chiba, JP;
Yoshitomo Osawa, Kanagawa, JP;
Akira Kurihara, Tokyo, JP;
Isao Kawashima, Kanagawa, JP;
Shigeyuki Yoneyama, Tokyo, JP;
Yoichiro Sako, Chiba, JP;
Yoshitomo Osawa, Kanagawa, JP;
Akira Kurihara, Tokyo, JP;
Isao Kawashima, Kanagawa, JP;
Shigeyuki Yoneyama, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A signal transmission method applicable to prevention of modification or alteration of the playback mode information, such as copying management information or charging information. The playback mode information form a terminal is data-converted for ciphering by a playback mode information appendage circuit in a header appendage circuit responsive to the key information from a terminal and the resulting information comprised of the data and the playback mode information is outputted. The reproducing side effects data conversion on the ciphered playback mode information for deciphering, by a playback mode information detection circuit in a header separation circuit, using the key information from a terminal, for taking out the original playback mode information at a terminal.