METHODS AND APPARATUS TO MEASURE EXPOSURE TO BROADCAST SIGNALS HAVING EMBEDDED DATA
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United States of America Patent
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Nov 4, 2021
app pub date -
Jul 12, 2021
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Jun 28, 2017
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Abstract
Example methods and apparatus to measure exposure to broadcast signals having embedded data are disclosed. Example meters disclosed herein are to decode a watermark from a first audio signal to obtain an identifier of a broadcast station, and query a data structure based on (i) the identifier of the broadcast station obtained from the watermark and (ii) a location, the query to obtain a transmission frequency of a broadcast signal corresponding to the audio signal. Disclosed example meters are also to tune a radio to the transmission frequency of the broadcast signal, and compare the first audio signal with a second audio signal from the radio to verify an identity of the broadcast station.
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