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. 11, 2008
Filed:
Dec. 10, 2001
Yoshimichi Kudo, Tokyo, JP;
Hitoaki Owashi, Tokyo, JP;
Atsushi Yoshioka, Tokyo, JP;
Hiroo Okamoto, Tokyo, JP;
Yoshimichi Kudo, Tokyo, JP;
Hitoaki Owashi, Tokyo, JP;
Atsushi Yoshioka, Tokyo, JP;
Hiroo Okamoto, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In transmission of stream data protected for copyright on a bus, transcription of stream data once recorded on a recording apparatus to a medium of another recording apparatus is realized. Authentication is carried out between a stream recording and playback apparatus and another recording apparatus to interchange a key for data scramble. By using this key, data is added with copy control information used when the data is recorded initially and thereafter the data is transmitted. After the data has been recorded on the recording apparatus, the data is deleted from an original recording medium. During transmission of the data, authentication from a different apparatus is rejected to prevent a plurality of copies from being made.