Enhancing the performance of audio data hiding method by smoothing interpolated samples

Protecting sensitive data such as military and medical data has played a significant role. Many methods have been introduced to secure and prevent the data from unauthorized users, including hiding secret data in other data such as audio, which is called data hiding methods. However, its ability to accommodate larger secret data is very limited. Moreover, the quality of the resulted stego data is not high enough. In this paper, we intend to work on these issues. Here, audio samples are firstly interpolated before being embedded by the secret. Next, the samples are smoothed to preserve their quality. In order to recover the audio and extract the secret data, the reverse steps are performed. The evaluation is done on various genres of audio musics. The experimental results show that this proposed method is able to increase the performance. Furthermore, the quality of the stego data has significantly raised in certain music genres and instruments.