Patent ID: 7403617
Filing Date: 2008-07-22
Classification: G11B,H04N

Abstract:
1. A method of copy protecting signals flowing from a descrambler module to a receiver via a link, said copy protecting method comprising the steps of: (a) receiving a digital signal in the receiver, said digital signal including a scrambled signal; (b) generating copy protection data in the receiver by utilizing a scheme which uses random number generation; (c) transmitting said digital signal from the receiver to the descrambler for generating a descrambled signal, and transmitting said copy protection data from the receiver to a function module, via the link; (d) providing the descrambled signal to the function module and receiving a copy protected signal which has been copy protected by application of said copy protection data to the descrambled signal in the function module; and (e) reconverting said copy protected signal to the descrambled signal in the receiver using said copy protection data.