Audio signal identification using code labels inserted in the audio signal
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United States of America Patent
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Jan 8, 2002
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N/A
app pub date -
Jan 11, 1999
filing date -
Mar 5, 1996
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Abstract
In an arrangement for decoding code labels embedded in audio signals by inserting signal bursts at selected frequencies into notch frequencies in the audio signal, problems of speed variations in the device producing the audio signal creating notch frequency variation are overcome by providing a plurality of decoders in parallel receiving an incoming signal, each decoder having notch frequencies incrementally displaced from those of the other decoders.
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