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Digital watermarking is now drawing attention as a new method of protecting digital content from unauthorized copying. This paper proposes a new watermarking scheme in based on Fast Fourier Transformation (FFT) for copyright protection of digital audio. In the proposed watermarking scheme, the original audio is segmented into non-overlapping frames. Watermarks are embedded into the selected prominent peaks of the magnitude spectrum of each frame. Informal listening reveals excellent imperceptibility of the embedded watermark. The proposed watermarking scheme is tested by various kinds of attack to demonstrate the robustness of watermarking.
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