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Method for data preparation and watermark insertion

  • US 6,834,345 B2
  • Filed: 08/08/2001
  • Issued: 12/21/2004
  • Est. Priority Date: 06/05/1998
  • Status: Expired due to Fees
First Claim
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1. A method for inserting a watermark into compressed data, the compressed data having sets of data characteristics, the method comprising:

  • manipulating the set of data characteristics; and

    optimizing the manipulated data by modifying the compressed data characteristics subject to a set of constraints, wherein the optimization procedure comprises;

    (i) obtaining a set of values from the compressed data;

    (ii) determining a set of changes to the compressed data that satisfy the set of constraints;

    (iii) choosing a change from the set of changes that optimizes detection of the watermark in the absence of any future changes; and

    (iv) repeating steps (i) through (iii) until all the compressed data is processed.

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