New patents are issued by the USPTO on Tuesdays. Both of today's Spotlight Patents concern aspects of conditional access systems typically used for DRM in cable systems. Assigned to Broadcom, the first of today's patents addresses techniques for video processing with with a conditional access module. Assigned to Viaccess (FR), the second patent addresses techniques for using a security processor and recording method and medium for configuring the behaviour of this processor.
9,332,288, "Video processing system with conditional access module and methods for use therewith," assigned to Broadcom.
A video processing system includes a video device that generates a request corresponding to video content. A conditional access module generates a video signal for transmission to the video device during a first time period, and terminates transmission of the video signal when the request is not authenticated during the first time period. In a further embodiment, the conditional access module generates a video signal for unscrambled transmission to the video device during a first time period, terminates the unscrambled transmission of the video signal at the expiration of the first time period, and continues with scrambled transmission of the video signal after the first time period.
9,332,297, "Security processor and recording method and medium for configuring the behaviour of this processor," assigned to Viaccess (FR).
Security processor (42) for a decoder able to receive a scrambled multimedia signal, this processor comprising: --at least one first rewritable lock (FIELDKEY, FIELDPIEMM, FIELDPIEMMC, FIELDPIECM, FIELDFCT) whose value can be toggled between a first and a second predetermined value in response to an EMM or ECM message, --a restriction function able to authorize and, alternately, prohibit, as a function of the value of the first lock, only one particular operation of the security processor, this particular operation being chosen from the group composed of: the use of a cryptographic key, the processing of a parameter contained in an EMM or ECM message received, and the execution of an elementary conditional access function of the code of the application.