| CPC H04N 21/44222 (2013.01) [H04N 21/6582 (2013.01)] | 20 Claims |

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1. A system for real time audience measurement, the system comprising:
a display;
an endpoint device coupled to the display; and
a central controller configured to:
generate a first message that flags a channel of interest from among a plurality of channels that provide content for displaying on the display;
send the first message to the endpoint device to flag the channel of interest at the endpoint device;
determine that the display is tuned to the channel of interest based on a change in polling rate, wherein the polling rate corresponds to a frequency at which it is determined which channel is currently being displayed on the display; and
generate and send viewership data for the channel of interest to a first entity.
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