Steganography of speech signal into an image

This paper proposes a new technique in which a speech signal is hidden inside an image. The method proposed has been implemented in matlab. In matlab image is basically stored in the form of a 3-dimension array say across the dimensions are x, y, z. The proposed method works by hiding sequence of speech signal elements in an image by varying the y dimension of the image while keeping x and z dimension of the image as constant. The value of the x dimension is changed by some interval for storing next speech signal elements. For the varied value of x dimension, y dimension is varied across the same interval as above while z dimension is constant here the next sequence of speech signal elements are saved. The above process is repeated for the next interval of x dimension till all the speech signal elements have been stored. The proposed method is easy to implement and requires less programming effort. As a speech signal is a multimedia data the amount of space a speech signal occupy´s large. The paper consists of experimental results driven in matlab environment.