Modified Phase Coding Audio Watermarking Resistant to Signal Attacks

Provided by: International Journal of Computer Applications
Topic: Security
Format: PDF
In this paper, a new phase coding method is used to embed any watermark data type (text, image, audio) in audio signals. The basic idea is to segment the audio signal and transforming it using the Discrete Fourier Transformation (DFT) and then embedding the watermark in the initial phase coefficients for every four segments. The used cover audio files of WAV type. The watermark can be extracted semi-blindly. Performance of the proposed watermarking methods was tested by using Normalized Correlation (NC) and Bit Error Rates (BER) to measure the robustness, and Signal to Noise Ratio (SNR) to evaluate the imperceptibility of their proposed methods.

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