An Overview of Digital Watermarking Techniques
Barun K. Pandhwal1, Devendra S. Chaudhari2

1Barun Pandhwal, Department of Electronics and Telecommunication Engineering, Government College of Engineering, Amravati, India.
2Dr. Devendra S. Chaudhari, Head of Department, Electronics and Telecommunication Engineering, Government College of Engineering, Amravati, India.
Manuscript received on February 05, 2013. | Revised Manuscript received on February 27, 2013. | Manuscript published on March 05, 2013. | PP: 300-304 | Volume-3 Issue-1, March 2013. | Retrieval Number: A1383033113/2013©BEIESP
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Abstract: One of the biggest technological events of the last two decades was the invasion of digital media in an entire range of everyday life aspects. Digital data can be stored efficiently with a very high quality and it can be manipulated very easily using computers. Furthermore, digital data can be transmitted in a fast and inexpensive way through data communication networks without losing quality. Digital media offer several distinct advantages over analog media. The quality of digital audio, images and video signals are better than that of their analog counterparts. Editing is easy because one can access the exact discrete locations that need to be changed. Copying is simple with no loss of information and a copy of a digital media is identical to the original. With digital multimedia distribution over World Wide Web, Intellectual Property Rights (IPRs) are more threatened than ever due to the possibility of unlimited copying. This problem can be handled by hiding some ownership data into the multimedia data, which can be extracted later to prove the ownership, a concept called watermarking. Continuous efforts are being made to device an efficient watermarking scheme and this paper conducts a literature survey of digital watermarking within an image. It describes the early work carried out on digital watermarks, including the brief analysis of various watermarking schemes and its potential applications.
Keywords: Digital watermarking, Least significant bit, Discrete Cosine Transform, Discrete Wavelet Transform.