Process for transmitting digital data, in particular sound data, in a TV channel
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United States of America Patent
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Jun 28, 1994
Grant Date -
N/A
app pub date -
Jul 17, 1992
filing date -
Dec 22, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method of transmitting digitally coded information in a television sound channel, the digitally coded information is inserted on an existing frequency-modulated RF sound carrier as a channel-coded signal above the television audio-frequency base spectrum in the base band. The modulation amplitude is selected so that disturbances during reproduction of the television sound are excluded in the receiver. The spectrum of the channel-coded signal is evenly distributed over the available frequency range using a pseudo-signal during modulation intervals. The clock frequency of the channel-coded signal is coupled with the line frequency.
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