High capacity digital audio watermarking technique in the frequency domain exploiting the properties of a psychoacoustic model

View the development of the Internet in the 90s and direction of the world into an era where digital is playing an increasingly important we found face serious problems of copyright, piracy, rights... OF where watermarking comes as an effective solution faces to these problems. Watermarking a signal (audio, image, video) means inserting a message (audio, image, beep, text) in an inaudible manner in the original audio signal in order to protect it. In this paper, we present a digital audio watermarking technique operating in the frequency domain. This technique uses the modified discrete cosine transform (MDCT) to switch to the frequency domain and the characteristics of the psychoacoustic model 2 of the MPEG standard in the insertion phase. The bits of the brand are duplicated to increase the capacity of insertion and then inserted into the sample selected by the MPH. To improve reliability in the decoding phase, an error correction code (Hamming) was introduced. The inaudibility of this technique is evaluated by using the PEAQ algorithm and calculating the SNR. The robustness of this technique is shown against different types of attacks.