Methods and apparatus to detect an internally generated...

Details Methods and apparatus to detect an internally generated... Methods and apparatus to detect an internally generated...

2010-05-20

2011-12-27

Salce, Jason (Department: 2421)

Interactive video distribution systems

Use surveying or monitoring

By passively monitoring receiver operation

C725S009000, C725S014000, C725S015000, C725S016000, C725S017000, C725S019000, C725S020000, C348S587000, C348S592000

Reexamination Certificate

active

08087042

ABSTRACT:
Methods and apparatus to detect an internally generated signal mode of a local media playback device are disclosed. A disclosed method comprises tuning a harmonic frequency of a chrominance signal output by a local media playback device, and determining that the local media playback device is in an internally generated signal mode if the measured harmonic frequency exceeds a predetermined threshold.

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