Process for transmitting digital data, in particular sound data,

Details Process for transmitting digital data, in particular sound data, Process for transmitting digital data, in particular sound data,

1992-07-17

1994-06-28

Powell, Mark R.

Television

Format

Including additional information

348484, 348487, H04N 706, H04N 704

Patent

active

053251270

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.

REFERENCES:
patent: 4079419 (1978-03-01), Siegle
patent: 4405944 (1983-09-01), Eilers
patent: 4821120 (1989-04-01), Tomlinson
patent: 5029003 (1991-07-01), Jonnalagadda
patent: 5075773 (1991-12-01), Pullen
patent: 5212551 (1993-05-01), Conanan

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