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Signal continuity assessment using embedded watermarks

  • US 9,558,526 B2
  • Filed: 02/01/2016
  • Issued: 01/31/2017
  • Est. Priority Date: 10/08/2003
  • Status: Expired due to Term
First Claim
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1. A method for detecting a change in arrangement of sections of a content, comprising:

  • receiving a multimedia content;

    extracting at least two watermark messages from the multimedia content;

    determining a separation between a first one of the at least two extracted watermark messages and a second one of the at least two extracted watermark messages within the multimedia content;

    using the payloads of the at least two extracted watermark messages to retrieve metadata associated with the at least two watermark messages; and

    processing the retrieved metadata in conjunction with the determined separation to detect a change in arrangement of the multimedia content sections, wherein each watermark message enables recovery of at least a first field and a second field, the first field including an identical value for each watermark embedded in a plurality of segments of the multimedia content, and the second field including different values in different segments of the multimedia content and wherein processing the metadata in conjunction with the determined separation includes one or both of;

    comparing the first field associated with the second extracted watermark message with the first field associated with the first extracted watermark message to detect a first difference value, orcomparing the second field associated with the second extracted watermark message with the second field associated with the first extracted watermark message to detect a second difference value.

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