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Methods and apparatus to distinguish a signal originating from a local device from a broadcast signal

  • US 7,643,090 B2
  • Filed: 12/10/2004
  • Issued: 01/05/2010
  • Est. Priority Date: 12/30/2003
  • Status: Active Grant
First Claim
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1. A method of distinguishing an audio-video signal originating from a local device from a broadcast signal, the method comprising:

  • classifying a video component of the audio-video signal by at least one of analyzing a histogram of pixel data, analyzing a quality factor, or attempting to detect embedded data in the video component;

    classifying an audio component of the audio-video signal by at least one of attempting to detect embedded audio data or analyzing waveform energy associated with the audio component; and

    determining a source of the audio-video signal based on at least one of the video classification or the audio classification, wherein determining the source of the audio-video component comprises combining values associated with the video classification with values associated with the audio classification.

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