Information carrier comprising access information
AssigneeKoninklijke Philips Electronics N.V.
InventorsAalbert Stek, Martinus W. Blum, Bart Van Rompaey
Life of this patent
Estimating the term…
Abstract
An apparatus for reading out information from an information carrier includes a reading unit for reading out user information and access information from the information carrier. The user information are stored in a first region of the information carrier and the access information are stored in a second region of the information carrier. The apparatus further includes an access controller for providing access to the user information in dependence on the access information. The access information are stored in a first portion of the second region, and the dummy information are stored in a second portion of the second region according to a similar format as used for storing the access information.
Claims20
An apparatus for reading out information from an information carrier, the apparatus comprising:
- a reader for reading out user information and access information from the information carrier, the user information being stored in a first region of the information carrier and the access information being stored in a second region of the information carrier;
- and
- a controller for providing access to the user information in dependence on the access information;
- wherein the access information are stored in a first portion of the second region, and wherein dummy information are stored in a second portion of the second region according to a similar format as used for storing the access information.
A method of hiding access information on an information carrier, the information carrier comprising user information stored in a first region of the information carrier and the access information being for accessing the user information, the method comprising the acts of:
- storing the access information in a first portion of a second region of the information carrier;
- and
- storing dummy information in a second portion of the second region different from the first portion to minimize a noise difference between the first portion and the second portion.
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 the user information;
- a second region having a first portion and a second portion, the first portion comprising access control information and the second portion comprising dummy information,
- wherein the dummy information are stored in the second portion of the second region according to a similar format as used for storing the access information in the first portion of the second region.
Dependencies are inferred from the claim text.