Patent ID: 6055020
Filing Date: 2000-04-25
Classification: H04N

Abstract:
A method of transmitting additional data in television images comprising the steps of:a) for each FBAS signal of a television frame to be transmitted, storing predetermined line structure data, the predetermined line structure data containing intervals free of color and/or video signals,b) deriving a frame pulse and line pulses from the FBAS signals of the television frame to be transmitted,c) counting the line pulses in response to the frame pulse,d) selecting the line structure data stored for a first FBAS signal of the frame to be transmitted as a function of the frame pulse and a first line pulse,e) inserting the additional data into the intervals free of color and/or video signals of the first FBAS signal in a rhythm of a predetermined data clock pulse and as a function of the line structure data of the first FBAS signal,f) transmitting the additional data in the first FBAS signal with signal levels that reduce interference in the reception of television broadcasts, andg) repeating steps d) through f) for each additional FBAS signal of the television frame to be transmitted.