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Abstract

A system for deterring unauthorized reproduction of a video presentation including a plurality of images to be displayed and method for operating the system. The system includes an encoder for encoding a signal for transmission over a vulnerable communications link to a decoder. The encoder includes: a first memory having a first plurality of addressable memory locations for storing at each of the locations data corresponding to a portion of at least one of the images to provide an array of data; and, a randomizer for pseudo-randomly addressing the first memory to provide a pseudo-random data signal corresponding to the one of the images. The decoder includes: a second memory having a second plurality of addressable memory locations; and, a derandomizer for receiving the pseudo-random data signal and for pseudo-randomly applying the received data to the second plurality of memory locations corresponding to the original memory location array in the first memory to provide the array of data as stored in the first memory in the second memory locations and being capable of being conventionally addressed to provide a signal for reception by a display device.

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First Claim