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US 7,254,236 B1Granted
Method and system for handling two CA systems in a same receiver
AssigneeThomson Licensing
InventorsAhmet Mursit Eskicioglu, Michael Scott Deiss, Jean-Louis Diascorn, David Jay Duffield
Life of this patent
Estimating the term…
Abstract
A method for enabling a security device to access a service protected by a conditional access system, wherein the service has associated with it two conditional access (CA) system identifier pairs. The device extracts the two CA identifier pairs and automatically identifies the pairs based on a predefined convention, for example, the order in which the identifier pairs are sent. The identifier pairs may comprise a conditional access entitlement control message identifier and a local entitlement control message identifier.
Claims19
A method for enabling a security device to access a service, the method comprising:
- receiving a datastream including said service and ancillary data associated with said service;
- extracting at least two service and entitlement control message packet identifier pairs associated with said service from said datastream, each said packet identifier pair including a service identifier and an entitlement control message packet identifier associated with said service;
- and
- automatically identifying one of the extracted pairs according to a predefined convention,
- wherein said entitlement control message packet identifier comprises one of a conditional access entitlement control message identifier and a local entitlement control message identifier.
2 more elements
A method for enabling a security device to access a service, the method comprising:
- receiving a datastream including said service and ancillary data associated with said service;
- extracting service and entitlement control message packet identifier pairs associated with said service from said datastream, each said packet identifier pair including a service identifier and an entitlement control message packet identifier associated with said service;
- and,
- if only one service and entitlement control message packet identifier pair associated with the service is extracted, identifying the extracted pair based on type information associated with the extracted packet identifier pair;
- and,
- if more than one service and entitlement control message packet identifier pair associated with the service are extracted, automatically identifying at least one of the extracted pairs according to a predefined convention,
- wherein a first one of the received pairs includes a conditional access entitlement control message identifier and a second one of the received pairs includes a local entitlement control message identifier.
4 more elements
A method for identifying local entitlement control messages comprising the step of:
- receiving a datastream including a service and ancillary data associated with said service;
- extracting service and entitlement control message packet identifier pairs associated with said service from said datastream, each said packet identifier pair including a service identifier and an entitlement control message packet identifier associated with said service;
- and,
- if only one service and entitlement control message packet identifier pair associated with the service is extracted, identifying the extracted pair as including either a local entitlement control message or a broadcast entitlement control message based on type information associated with the extracted packet identifier pair;
- and,
- if more than one service and entitlement control message packet identifier pair associated with the service are extracted, automatically identifying at least one of the extracted pairs as including said local entitlement control message according to a predefined convention.
3 more elements
A method for identifying local entitlement control messages comprising the step of:
- extracting service and entitlement control message packet identifier pairs from data associated with a service;
- and,
- if only one service and entitlement control message packet identifier pair associated with the service is extracted, identifying the extracted pair as including either a local entitlement control message or a broadcast entitlement control message based on type information associated with the extracted packet identifier pair;
- and,
- if more than one service and entitlement control message packet identifier pair associated with the service are extracted, automatically identifying at least one of the extracted pairs as including a broadcast entitlement control message according to a predefined convention.
2 more elements
A method, comprising:
- receiving a datastream including a service;
- identifying, in the datastream, at least two service and entitlement control message packet identifier pairs associated with said service, wherein one of the received pairs includes a conditional access entitlement control message identifier and a second one of the received pairs includes a local entitlement control message identifier;
- determining whether a particular one of the identified service and entitlement control message packet identifier pairs is associated with one of a conditional access entitlement control message of a service provider and a local entitlement control message of a local network based on a predefined convention related to an ordering of the service and entitlement control message packet identifier pairs within the datastream;
- acquiring data packets associated with the service and entitlement control messages in response to the packet identifier pairs;
- determining a decryption key in response to the acquired data packets;
- decrypting the data packets having service data in response to the decryption key.
3 more elements
Dependencies are inferred from the claim text.