Information carrier comprising access information
AssigneeKoninklijke Philips N.V.
InventorsAalbert Stek, Martinus W. Blum, Bart Van Rompaey
Life of this patent
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Abstract
An apparatus for accessing an information carrier for holding user information includes access information for accessing the user information, the access information being stored in a pre-determined first region on the information carrier. The information carrier further includes at least one further region different from the first region, the further region comprising dummy information.
Claims30
An apparatus for reading out information from an information carrier, the apparatus comprising:
- a reading unit configured to read out user information and access information from the information carrier;
- and
- access control unit configured to provide access to the user information in dependence on the access information;
- wherein the access information are stored in a pre-determined first region on the information carrier, and wherein dummy information are stored in at least one further region, and
- wherein a change in a noise level of a read out signal for the dummy information is similar to a change of a noise level of a read out signal for the access information.
A non-transitory computer readable media for insertion into a reading apparatus for reading user information from the media;
- the media comprising:
- a first region comprising access control information and a different further region comprising dummy information, wherein a change in a noise level of a read out signal for the dummy information is similar to a change of a noise level of a read out signal for the access information;
- and
- user information,
- wherein the access control information is configured to control a controller of the reading apparatus to provide access to the user information depending on the access information.
Dependencies are inferred from the claim text.