Patent ID: 6996236
Filing Date: 2006-02-07
Classification: H04N

Abstract:
1. A method of processing first, second, and third video signals for use in a system having first, second, third and fourth signal lines, wherein the first, second, and third signal lines couple a source device to a destination device, a pseudo-random number generator being contained within the source device, the method comprising: operating the source device to communicate with the destination device so as to establish a session key and synchronization information via one or all of the first, second, third and fourth signal lines during a vertical blanking period; operating the pseudo-random number generator to generate said pseudo-random output values as a function of the established session key; generating a fourth signal; generating, using said pseudo-random number generator, pseudo-random output values; and for each of the first, second, third and fourth signal lines, selecting, for transmission thereon, one of the first, second, third, and fourth signals, the selection being performed in a mutually exclusive manner and as a function of at least one of said pseudo-random output values, the selection also being performed by a matrix multiplication operation performed on the first, second, third and fourth signals utilizing matrix coefficients generated from a plurality of the pseudo-random output values, wherein the first, second and third signals are red, green and blue video signals, respectively, the method further comprising the steps of encrypting horizontal synchronization information into at least one of said red, green and blue video signals prior to changing which ones of the first, second, third and fourth signal lines are used to transmit said first, second and third signals.