Extraction of embedded watermarks from a host content using a plurality of tentative watermarks
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United States of America Patent
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Dec 30, 2014
Grant Date -
May 9, 2013
app pub date -
Nov 3, 2011
filing date -
Nov 3, 2011
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Abstract
Methods, devices and computer program products facilitate the extraction of embedded watermarks in the presence of content distortions. Distortion of the content is estimated using two or more detected watermarks with an associated probability of false detection that is above a desired level. The estimated content distortion is used to obtain pre-distorted synchronization templates and to reevaluate the detected watermarks. The use of pre-distorted synchronization templates results in obtaining better estimations of content distortion, and improved reliability of watermark detections.
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