Importance

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Abstract

To transmit digital data in a color television signal, a color burst is transmitted in its standard reference position to represent a first logic state, e.g., a '0' and is shifted by a limited amount from the standard reference position to represent a second logic state, e.g., a '1'. More specifically, the 'bits' of the data are 'read-out' of a register in response to the horizontal synchronization pulses generated in the transmitter and are used as control signals to generate burst flag pulses in the standard or a shifted position depending on whether the bit to be transmitted is a logic '0' or a logic '1'. The burst flag pulses are used to insert the color bursts in the back porch portion of the horizontal blanking interval. At the receiver, a burst demodulator extracts the color bursts and determines the position of each color burst to recover the transmitted data.

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First Claim