Patent ID: 7336786
Filing Date: 2008-02-26
Classification: H04N

Abstract:
1. A reproduction apparatus for reproducing video or audio information recorded in a storage medium, comprising: an encryption system detection circuit having at least one of hardwiring and programming, to operate to detect whether the video or audio information recorded in said storage medium is encrypted or not in accordance with a predetermined encryption system; an electronic watermark detection circuit having at least one of hardwiring and programming, to operate to detect an electronic watermark information indicative of a copy management information, including at least copy prohibition which is superimposed onto the video or audio information, in a case where the video or audio information recorded in said storage medium is detected in said encryption system detection circuit as being not encrypted in accordance with the predetermined encryption system; and a reproduction restricting circuit having at least one of hardwiring and programming, to operate to control reproduction of the video or audio information in accordance with said copy management information, when any of the copy management information is detected upon a detection result by said watermark detection circuit, in a case where the video or audio information recorded in said storage medium is not encrypted in accordance with the predetermined encryption system.