Detecting a watermark embedded in an information signal

Details Detecting a watermark embedded in an information signal Detecting a watermark embedded in an information signal

1997-07-16

1999-08-03

Shah, Kamini

Data processing: measuring, calibrating, or testing

Measurement system

Measured signal processing

380 4, G09C 500, H04L 900

Patent

active

059337982

ABSTRACT:
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.

REFERENCES:
patent: 5664018 (1997-09-01), Leighton

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