Display device on/off detection methods and apparatus
AssigneeThe Nielsen Company (US), LLC
InventorsChristen V. Nielsen, Dan Nelson
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Abstract
Display device ON/OFF detection methods and apparatus are disclosed. Example metering apparatus disclosed herein include a current detector to measure an electrical current drawn by a monitored media device from a power source, and an audio sensor. Disclosed example metering apparatus also include a processor to compare the electrical current to a first threshold and to compare a level associated with audio sensed by the audio sensor to a second threshold to determine whether the monitored media device is ON or OFF.
Claims20
A metering apparatus comprising:
- a current detector to measure an electrical current drawn by a monitored media device from a power source;
- an audio sensor;
- and
- a processor to compare the electrical current to a first threshold and to compare a level associated with audio sensed by the audio sensor to a second threshold to determine whether the monitored media device is ON or OFF.
At least one computer readable storage device or storage disk comprising computer readable instructions that, when executed, cause a processor to at least:
- compare a measured electrical current drawn by a monitored media device from a power source to a first threshold;
- compare a level associated with audio sensed by an audio sensor to a second threshold;
- and
- determine whether the monitored media device is ON or OFF based on comparison of the measured electrical current to the first threshold and comparison of the level associated with the audio to the second threshold.
A metering apparatus comprising:
- means for measuring an electrical current drawn by a monitored media device from a power source;
- means for sensing audio;
- and
- means for determining whether the monitored media device is ON or OFF based on comparison of the measured electrical current to a first threshold and comparison of a level associated with the audio to a second threshold.
Dependencies are inferred from the claim text.