초록 ▼

To detect a watermark signal embedded within an information signal, predictive filtering is applied to either the information signal, a plurality of applied watermark signals, or both types of signals. After the filtering, a correlation is determined between the information signal and the watermark

To detect a watermark signal embedded within an information signal, predictive filtering is applied to either the information signal, a plurality of applied watermark signals, or both types of signals. After the filtering, a correlation is determined between the information signal and the watermark signals. The amount of the correlation is indicative of whether a particular watermark is embedded within the information signal.

대표청구항 ▼

[ I claim:] [5.] An arrangement for detecting a watermark signal embedded in an information signal, comprising:correlation means for correlating the information signal and an applied watermark signal and:evaluation means for evaluating the result of said correlation, communicating with the correlati

[ I claim:] [5.] An arrangement for detecting a watermark signal embedded in an information signal, comprising:correlation means for correlating the information signal and an applied watermark signal and:evaluation means for evaluating the result of said correlation, communicating with the correlation means; anda predictive filter for filtering the information signal or for filtering the applied watermark, or both, and connected for applying the filtered signal and the filtered watermark to the correlation means.