| 摘要 |
A method and apparatus is featured for encoding electronic intelligence into the horizontal synchronizing pulses of a television video signal, utilizing Amplitude Modulation of the horizontal synchronizing pulses during the active picture portion of the video field. The prime function of the invention is to utilize television transmission links as a co-existant transport medium for another form of electronic intelligence, typically, but not limited, to text, simultaneously with the transport of the television video signal. The invention clearly multiplies the efficiency and utility of existing and future television transmission links, by allowing another form of electronic intelligence to share transport mediums in a parasitic manner.
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