Patent ID: 8385542

Claim:
A method for processing a television transmission signal, the method comprising: receiving an encrypted input stream in a decryption device associated with a television receiver, the encrypted input stream including compressed audio/video content, the encrypted input stream received by the decryption device at a first data rate; decrypting the encrypted input stream in the decryption device to extract the compressed audio/video content; generating supplemental information in the decryption device; creating an expanded output stream by combining the compressed audio/video content and the supplemental information in the decryption device; encrypting the expanded output stream to create an encrypted output stream; transmitting the encrypted output stream to the television receiver at a second data rate that is greater than the first data rate; decrypting the encrypted output stream in a local decrypter of the television receiver; separating the compressed audio/video content from the supplemental information in the decrypted output stream within the television receiver; decompressing the compressed audio/video content within the television receiver; outputting the decompressed audio/video content from the television receiver for presentation by a presentation device.