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A New Audio Watermarking System using Discrete Fourier Transform for Copyright Protection


Pranab Kumar Dhar, Mohammad Ibrahim Khan, Jong-Myon Kim


Vol. 10  No. 6  pp. 35-40


Digital watermarking is now drawing attention as a new method of protecting multimedia content from unauthorized copying. This paper proposes a new watermarking system using discrete Fourier transform (DFT) for copyright protection of digital contents. In our proposed watermarking system, the original audio is segmented into non-overlapping frames. Watermarks are then embedded into the highest prominent peak in the magnitude spectrum of each frame. Watermarks are extracted by performing the inverse operation of watermark embedding process. Simulation results indicate that the proposed watermarking system is highly robust against various kinds of attacks such as noise addition, cropping, re-sampling, re-quantization, and MP3 compression, and achieves similarity values ranging from 13 to 20. In addition, our proposed system achieves SNR (signal-to-noise ratio) values ranging from 20 dB to 28 dB.


Copyright protection, digital watermarking, multimedia contents, discrete Fourier transform