Multiple lingual television in a multiplex broadcast system
First Claim
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1. MEANS FOR MODIFYING A CONVENTIONAL TV RECEIVER HAVING A DISCRIMINATOR AND AUDIO AMPLIFIER TO PERMIT SELECTION OF ANY ONE OF A PLURALITY OF DIFFERENT LINGUAL AUDIO SIGNALS RESPECTIVELY AMPLITUDE MODULATED ON SUBCARRIERS SPACED APART IN FREQUENCY WITHIN THE ALLOTTED SOUND BANDWIDTH WITH THE SUBCARRIERS BEING FREQUENCY MODULATED ON A SINGLE CHANNEL CARRIER TO BE SIMULTANEOUSLY BROADCAST COMPRISING IN COMBINATION A PLURALITY OF FREQUENCY SELECTIVE PATHS INCLUDING RESPECTIVELY BANDPASS FILTERS RESPONSIVE TO THE SUBCARRIERS OF THE AUDIO SIGNALS;
- AN AMPLITUDE DETECTOR;
AND SWITCHING MEANS FOR SELECTIVELY CONNECTING ANY ONE OF SAID PATHS BETWEEN THE DISCRIMINATOR AND THE DETECTOR TO PERMIT DETECTION OF THE AUDIO SIGNAL FROM THE SELECTED SUBCARRIER FOR APPLICATION TO THE AUDIO AMPLIFIER TO PROVIDE LANGUAGE FOR USE WITH THE TV PICTURE.
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1 Claim
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1. MEANS FOR MODIFYING A CONVENTIONAL TV RECEIVER HAVING A DISCRIMINATOR AND AUDIO AMPLIFIER TO PERMIT SELECTION OF ANY ONE OF A PLURALITY OF DIFFERENT LINGUAL AUDIO SIGNALS RESPECTIVELY AMPLITUDE MODULATED ON SUBCARRIERS SPACED APART IN FREQUENCY WITHIN THE ALLOTTED SOUND BANDWIDTH WITH THE SUBCARRIERS BEING FREQUENCY MODULATED ON A SINGLE CHANNEL CARRIER TO BE SIMULTANEOUSLY BROADCAST COMPRISING IN COMBINATION A PLURALITY OF FREQUENCY SELECTIVE PATHS INCLUDING RESPECTIVELY BANDPASS FILTERS RESPONSIVE TO THE SUBCARRIERS OF THE AUDIO SIGNALS;
- AN AMPLITUDE DETECTOR;
AND SWITCHING MEANS FOR SELECTIVELY CONNECTING ANY ONE OF SAID PATHS BETWEEN THE DISCRIMINATOR AND THE DETECTOR TO PERMIT DETECTION OF THE AUDIO SIGNAL FROM THE SELECTED SUBCARRIER FOR APPLICATION TO THE AUDIO AMPLIFIER TO PROVIDE LANGUAGE FOR USE WITH THE TV PICTURE.
- AN AMPLITUDE DETECTOR;
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Current AssigneeEugene S. Feldman, Omar Wing
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Original AssigneeEugene S. Feldman, Omar Wing
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InventorsFeldman, Eugene S., Wing, Omar
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Application NumberUS04/217,201Time in Patent Office1,203 DaysField of SearchUS Class Current348/738CPC Class CodesH04N 5/607 for more than one sound sig...H04N 7/06 Systems for the simultaneou...
