Digital Water Marking and its Application in Various Media Types

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