Curve fitting for synchronizing readers of hidden auxiliary data
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United States of America Patent
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Jun 24, 2008
Grant Date -
Jul 5, 2007
app pub date -
Jul 11, 2006
filing date -
Dec 18, 2000
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Abstract
A curve fitting method is used to synchronize a reader of embedded data in a media signal. A circular reference signal is embedded in the media signal. After geometric distortion of the media signal, the reference signal is distorted, yet still detectable. The amount of distortion is derived by detecting the reference signal, and applying a curve fitting method from which the distortion is calculated.
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