ppt on digital watermaking . pdf download

ABSTRACT

In the wake of increasing copyright misuses, several new technologies are developed to
preserve the authentication of information. Digital water marking is one of them. It is a
technique that allows us to add hidden copyright notices, verification messages or any
other useful information to the original signal.The hidden message can be a group of bits
that describe something about the signal or about the genuine author of the signal. The
description can be about the name, place or something related to this. Much of the
research work has been done in the field of digital watermarking in the recent period of
time.In this paper, a brief description about various digital water marking techniques for
different media types is given. Watermark insertion and watermark decoding is described
as well. The watermarking techniques described for various media types include audio
water marking, video water marking, image water marking and text water marking. Some
of the properties and applications are also discussed.

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