Patent ID: 8065707

Claim:
A method for providing a combined TV/PC video stream for PC display, comprising: providing a PC graphics chip having a video input port for receiving TV video signals and an input for receiving PC graphics signals; providing a TV video chip having a video output port for transmitting TV video signals and an input for receiving TV broadcast signals; providing a TV video signal from said TV video chip to said PC graphics chip via a conditional connection between said video output port of said TV video chip and said video input port of said PC graphics chip, said connection controlled by a unidirectional access block interfacing between said TV video chip and said PC graphics chip, said unidirectional access block being operative to controllably enable or disable said connection; mixing in said PC graphics chip said received TV video signal and a received PC graphics signal to generate a combined TV/PC video stream in a format for PC display; causing said unidirectional access block to disable said connection when a TV broadcast signal received by said TV video chip is determined to include copy protected data, thereby preventing said PC graphics chip from receiving said TV video signal from said TV video chip such that the copy protected data cannot be transferred from said TV video chip to said PC graphics chip.