Data transmission using color burst position modulation

Details Data transmission using color burst position modulation Data transmission using color burst position modulation

1990-12-13

1993-03-23

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358147, 358 18, H04N 945, H04N 9455

Patent

active

051969211

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.

REFERENCES:
patent: 3723637 (1973-03-01), Fujio et al.
patent: 4134127 (1979-01-01), Campioni
patent: 4350999 (1982-09-01), Mortimer
patent: 4783699 (1988-11-01), DePaul
patent: 4916736 (1990-04-01), Ryan

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