Display device on/off detection methods and apparatus
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United States of America Patent
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Aug 16, 2016
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app pub date -
Aug 30, 2013
filing date -
Aug 16, 2005
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Abstract
Display device ON/OFF detection methods and apparatus are disclosed. Example methods disclosed herein include performing audio code detection on an audio signal corresponding to an output of a presentation device. Such disclosed example methods also include determining a first result based on whether a valid audio code is detected in the audio signal, and determining a second result based on an audio gain level used to adjust the audio signal prior to performing audio code detection on the audio signal. Such disclosed example methods further include combining the first result and the second result to determine a third result indicating whether the presentation device is ON or OFF.
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