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United States of America Patent
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Nov 21, 2017
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app pub date -
Jan 25, 2008
filing date -
Jan 25, 2007
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Abstract
An ancillary code is extracted from the media signal by monitoring the media signal during a first time interval according to a first monitoring parameter, evaluating the media signal to detect an ancillary code and optionally monitoring the media signal during a second monitoring time interval depending on an outcome of the evaluation of the media signal. In different iterations, different data acquisition window durations and/or overlaps are applied according to a factor such as an iteration count or a detection confidence level.
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