Patent ID: 8196161
Filing Date: 2012-06-05
Classification: H04H,H04N

Abstract:
1. A method of processing digital television programs at a receiver, comprising: receiving a digital stream containing a first set of packets representing content of a scrambled program currently tuned by said receiver and a second set of packets representing content of an unscrambled program, said receiving resulting in a received stream; filtering said received stream to form a filtered stream to be provided to a descrambler, said filtered stream containing both said first set of packets and said second set of packets in a changed form wherein a payload of each packet of said second set has been changed, said changed payloads preventing interception of said unscrambled program at an interface to said descrambler; and providing said filtered stream, including said second set of packets in said changed form, to said descrambler via said interface for descrambling said scrambled program, wherein said filtering comprises, for each packet in said stream of packets representing program content: