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Method and apparatus for establishing an accurate low bit time stamp in a remotely created watermark

  • US 8,416,983 B1
  • Filed: 04/23/2010
  • Issued: 04/09/2013
  • Est. Priority Date: 04/23/2010
  • Status: Active Grant
First Claim
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1. A method for time stamping a retrieved version of a media program, comprising the steps of:

  • receiving a media program in a receiver remote from a headend, the media program having a first watermark including a time stamp describing a media program temporal datum to a first temporal resolution;

    storing the media program;

    retrieving the stored media program;

    reading the first time stamp of the first watermark of the retrieved media program;

    computing a second time stamp from the temporal difference between a time at which the media program is retrieved from storage and the media program temporal datum, the second time stamp having a second temporal resolution greater than the first temporal resolution;

    generating a second watermark having the second time stamp;

    embedding the second watermark in the retrieved media program; and

    providing the media program and the embedded second watermark to a device external to the receiver.

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