Patent ID: 8301893

Claim:
A method of identifying portions of digital data suspected to include digital watermark data, the method comprising: segregating, via a decoder, digital data into a plurality of windows, wherein the digital data corresponds to a single media object having first and second different areas conveying first and second different digital watermarks, respectively, wherein the first digital watermark includes a first orientation component and the second digital watermark includes a second orientation component, wherein the first and second orientation components provide information regarding distortion of the first and second digital watermarks, respectively, wherein the first orientation component is embedded so as to represent a first orientation, and wherein the second orientation component is embedded so as to represent a second different orientation; for each of the plurality of windows, determining an orientation measure via the decoder; grouping the windows based on the orientation measures via the decoder; and selecting, via the decoder, at least two of the groups based on at least one of a number of windows assigned to a group or a collective watermark strength for a group, wherein the windows within the selected groups include the portions of the digital data that are suspected to include digital watermark data.