Reproduction apparatus
First Claim
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.
3 Assignments
0 Petitions
Accused Products
Abstract
Information or contents cannot be reproduced even from a regular storage medium which is encrypted in accordance with a predetermined encryption system, due to erroneous detection of watermarks. Detection of the watermarks and restriction over reproduction depending thereon is conducted only in a case where the medium is not encrypted. In case of detecting that the data is not encrypted in accordance with a predetermined encryption system by an encryption detection circuit and when the watermarks are detected by a watermark detection circuit, reproduction of the data is stopped by a reproduction restricting circuit. In a case that it is detected to be encrypted in the predetermined encryption system by the encryption detection circuit, the reproduction restricting circuit will not stop the reproduction thereof.
13 Citations
12 Claims
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1. A reproduction apparatus for reproducing video or audio information recorded in a storage medium, comprising:
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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. - View Dependent Claims (2, 3, 4, 5)
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6. A reproducing method for reproducing video or audio information recorded in a storage medium, comprising:
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an encryption system detecting, using an encryption system detection circuit having at least one of hardwiring and programming, to detect whether the video or audio information recorded in the storage medium is encrypted in accordance with a predetermined encryption system or not; an electronic watermark detecting, using an electronic watermark detecting circuit having at least one of hardwiring and programming, to detect electronic watermark information indicative of copy management information, including at least a copying 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 not encrypted in accordance with the predetermined encryption system; and a reproduction restricting, using a reproduction restricting circuit, to control reproduction of the video or audio information in accordance with said copy management information, when any one of the copy management information is detected upon a detection result of said electronic watermark detecting operation. - View Dependent Claims (7)
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8. A system comprising:
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a reproduction apparatus for reproducing video or audio information recorded in a storage medium, including; 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, and at least one of;
a reader to read information recorded in the storage medium and supply the same to the reproduction apparatus; and
an output unit to receive an output of the reproduction apparatus to produce at least one of audio sound and video display. - View Dependent Claims (9, 10, 11, 12)
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Specification