Audio watermarking technique using modified discrete cosine transform

Audio watermarking is a data hiding technology widely used to increase the authentication of audio files and for copyright protection. Watermarking techniques hides copyright information, which can be a binary sequence or an image, within the audio signal in such a way that it is not perceivable by the listener. A large number of audio watermarking techniques are available. Authentication requires only a simple watermarking technique but to ensure security along with authentication, strong watermarking methods should be adopted. The proposed method uses watermarking based on Modified Discrete Fourier Transform (MDCT). Experimental analysis shows that the proposed method provides high audio quality when compared to other methods such as Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT).