With the growth of social media, authentication and patent protection of audio files contents protection becomes a challenging task.The old techniques proposed to overcome this problem have not sufficient ability to control the copyright protection of contents. This paper proposes a hybrid DWT-DCT algorithm for copyright protection of audio files. The audio signal is divided into frames according to the size of watermarking image. After that, watermark is added into audio file to protect the contents of audio file from unauthorized user.Finally the watermarked audio is tested against different attacks includingre-sampling, re-quantization, adding white Gaussian noise and filtering with 10 KHZ.The results are further compared with previously described technique. The experimental results demonstrate that this technique is robust enough against different attacks.
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