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. 08, 2016
Filed:
Mar. 12, 2007
Kazuhiko Nakane, Tokyo, JP;
Kazuhiko Nakane, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A content assessment apparatus, content assessment method, information reproducing apparatus, and information recording medium are provided that can determine whether digital content has been processed abnormally. The information reproducing apparatus includes a drive () that reads content from an information recording medium () on which content including an electronic watermark, indicating an attribute denoting whether or not the content is encrypted, is recorded, a decryptor (), a decryptor status monitor (), a stream attribute monitor (), a decision means () that determines that the content has been abnormally processed when a decryption status signal indicates otherwise than that decryption processing is being performed and an attribute detection signal indicates that the content is encrypted, or when the decryption status signal indicates that decryption processing is being performed and the attribute detection signal indicates that the content is non-encrypted, a video decoder (), and an output control means () that is not allowed to output the video signal if the content has been abnormally processed.