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Methods and apparatus for identifying segments of content in a presentation stream using signature data

  • US 8,407,735 B2
  • Filed: 05/04/2009
  • Issued: 03/26/2013
  • Est. Priority Date: 12/24/2008
  • Status: Active Grant
First Claim
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1. A method for processing an audio/video stream, the method comprising:

  • receiving location information including a text string associated with a first video location within the audio/video stream, the text string referencing closed captioning data associated with the audio/video stream to identify the first video location within the audio/video stream, the location information being received separately from the audio/video stream;

    receiving a signature of a portion of the audio/video stream, wherein the signature refers to waveform characteristics of the portion of the audio/video stream;

    receiving at least one search boundary offset specified relative to the first video location;

    processing the location information and the closed captioning data to locate an instance of the text string in the closed captioning data;

    identifying an intermediate video location within the audio/video stream, based on the instance of the text string located in the closed captioning data;

    applying the at least one search boundary offset to the identified intermediate video location to identify search boundaries within the audio/video stream;

    processing content of the audio/video stream within the search boundaries to locate boundaries of a segment of the audio/video stream, based on the received signature and at least one segment boundary offset associated with the received signature;

    receiving user input requesting presentation of the segment of the audio/video stream; and

    outputting the segment for presentation by a display device, wherein the outputting uses the located boundaries of the segment.

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