On Thursdays the USPTO publishes new pending patent applications. Today's Spotlight Applications concern various aspects of conditional access and copy protection systems. Assigned to LG Electronics (KR), the first application discloses techniques for interfacing resource information between a host device and a security module (or Point of Deployment module). Assigned to Macrovision, the second application discloses techniques for synthesizing a copy protection or content control signal with improved playability of a TV set.
A broadcasting receiver and method of interfacing resource information between a host device and a POD, sending host device resource information and obtaining host device resource information are disclosed. A POD sends a resource information requesting message. And a host device receives the resource information requesting message and responds with a resource information message including a resource identifier defined in a resource information table which includes information indicating whether the host device supports A-mode. Using a "conditional access" feature provided by a conventional cable security card, content received through any type of transport protocol (including an IP protocol) including a wired/wireless network can be protected and A-mode resource information can be systematically defined together with other-mode IP communication resource and the resource information of different modes can be integrated and transmitted to the host device.
20090052866, "Method and apparatus for synthesizing a copy protection or content control signal with improved playability of a TV set," assigned to Macrovision.
Playability of a copy protected video signal is improved by reducing the darkening and or venetian blind effects which tend to cause artifacts in a video signal display. To this end, the copy protection signal includes automatic gain control (AGC) signals or pulses in video lines in a portion of the active or viewable video field or frame, wherein the AGC pulses comprise non similar AGC signals from one video line to another video line. The dis-similar AGC pulses may include pulses which are deleted, blanked, attenuated, pulse width modified, modulated, etc. In addition, selected sync pulses may be pulse width, amplitude and or position modified.