Information carrier comprising access information
AssigneeKoninklijke Philips Electronics N.V.
InventorsAalbert Stek, Martinus Wilhelmus Blum, Bart Van Rompaey
Life of this patent
Estimating the term…
Abstract
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 information carrier (1) for holding user information (16), the information carrier comprising access information (17) for accessing the user information, the access information being stored in a pre-determined first region on the information carrier, and the information carrier further comprising at least one further region different from the first region, the further region comprising dummy information;
- wherein the access information (17) is stored on the information carrier (1) in a variation of a parameter, the parameter being a radial position of the pits/marks in a wobbled track;
- and
- wherein the dummy information is stored on the information carrier according to the same or similar format as used for the access information, so that the change in the noise level of the read out signal for the dummy information is similar to the change in the noise level of the read out signal for the access information.
Apparatus for reading out user information (16) from an information carrier (1), the information carrier comprising access information (17) for accessing the user information, the access information being stored in a pre-determined first region on the information carrier, and the information carrier further comprising at least one further region different from the first region, the further region comprising dummy information, the dummy information is stored on the information carrier according to the same or similar format as used for the access information, so that the change in the noise level of the read out signal for the dummy information is similar to the change in the noise level of the read out signal for the access information, wherein the apparatus comprises:
- a reading unit (41, 47) for reading out the user information (16) and the access information;
- and
- access control means (47) for providing access to the user information (16) in dependence on the access information (17);
- and
- wherein the access information is stored on the information carrier in a variation of a parameter, the parameter being a radial position of the pits/marks in a wobbled track;
- and
- wherein the apparatus further comprises a detection module suitable for detecting said access information in the pre-determined first region.
An information carrier (1) for holding user information (16), the information carrier comprising access information (17) for accessing the user information, the access information being stored in a pre-determined first region on the information carrier, and the information carrier further comprising at least one further region different from the first region, the further region comprising dummy information;
- wherein the access information (17) is stored on the information carrier (1) in a side channel, the side channel being a wobbled pre-groove;
- and
- wherein the dummy information is stored on the information carrier according to the same or similar format as used for the access information, so that the change in the noise level of the read out signal for the dummy information is similar to the change in the noise level of the read out signal for the access information.
Apparatus for reading out user information (16) from an information carrier (1), the information carrier comprising access information (17) for accessing the user information, the access information being stored in a pre-determined first region on the information carrier, and the information carrier further comprising at least one further region different from the first region, the further region comprising dummy information, the dummy information is stored on the information carrier according to the same or similar format as used for the access information, so that the change in the noise level of the read out signal for the dummy information is similar to the change in the noise level of the read out signal for the access information, wherein the apparatus comprises:
- a reading unit (41, 47) for reading out the user information (16) and the access information;
- and
- access control means (47) for providing access to the user information (16) in dependence on the access information (17);
- and
- wherein the access information is stored on the information carrier in a side channel, the side channel being a wobbled pre-groove;
- and
- wherein the apparatus further comprises a detection module suitable for detecting said access information in the pre-determined first region.
Apparatus for reading out user information (16) from an information carrier (1), the information carrier comprising access information (17) for accessing the user information, the access information being stored in a pre-determined first region on the information carrier, and the information carrier further comprising at least one further region different from the first region, the further region comprising dummy information, the dummy information is stored on the information carrier according to the same or similar format as used for the access information, so that the change in the noise level of the read out signal for the dummy information is similar to the change in the noise level of the read out signal for the access information, wherein the apparatus comprises:
- a reading unit (41, 47) for reading out the user information (16) and the access information;
- and
- an access control unit (47) adapted to provide access to the user information (16) in dependence on the access information (17);
- and
- wherein the access information is stored on the information carrier in a variation of a parameter, the parameter being a radial position of the pits/marks in a wobbled track;
- and
- wherein the apparatus further comprises a detection module suitable for detecting said access information in the pre-determined first region.
Apparatus for reading out user information (16) from an information carrier (1), the information carrier comprising access information (17) for accessing the user information, the access information being stored in a pre-determined first region on the information carrier, and the information carrier further comprising at least one further region different from the first region, the further region comprising dummy information, the dummy information is stored on the information carrier according to the same or similar format as used for the access information, so that the change in the noise level of the read out signal for the dummy information is similar to the change in the noise level of the read out signal for the access information, wherein the apparatus comprises:
- a reading unit (41, 47) for reading out the user information (16) and the access information;
- and
- access control unit (47) adapted to provide access to the user information (16) in dependence on the access information (17);
- and
- wherein the access information is stored on the information carrier in a side channel, the side channel being a wobbled pre-groove;
- and
- wherein the apparatus further comprises a detection module suitable for detecting said access information in the pre-determined first region.
Dependencies are inferred from the claim text.