Improved Technique for Audio Watermarking Based on Discrete Wavelet Transform
Mangal Patil1, J. S. Chitode2
1Mrs. Mangal V. Patil, Department of Electronics, Bharati Vidyapeeth University College of Engineering, Dhanakawadi, Pune, Maharashtra, India.
2Dr. Janardan S. Chitode, Department of Electronics, Bharati Vidyapeeth University College of Engineering, Dhanakawadi, Pune, Maharashtra, India.
Manuscript received on May 22, 2013. | Revised Manuscript received on June 10, 2013. | Manuscript published on June 30, 2013. | PP: 511-516 | Volume-2, Issue-5, June 2013. | Retrieval Number: E1905062513/2013©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: With digital computers, Internet flexibility promotes an efficient distribution of the digital contents. An Approach of digital watermarking has been proved as an effective approach for providing the copyright protection of multimedia data for audio, image & video signals. We propose an effective watermarking algorithm based on Discrete Wavelet Transform for audio. This approach embeds the image watermark data into approximate coefficients of the wavelet transform. Embedded watermark can be faithfully recovered under different attacks such as volume scaling, re-Sampling, low pass filtering & re-quantization, etc. The performance evaluation of proposed algorithm indicates improved signal to Noise ratio & peak signal to noise ratio.
Keywords: Digital Audio Watermarking, Information Hiding, Copyright Protection, Wavelet Transform, Robustness.