Steganographic Encoding Based on Sparse Representation

A data-hider can reduce the amount of alterations necessary to be introduced into a cover signal for data hiding by using stego-encoding techniques.In this paper,construction of the generalized stego-encoding technique is described in a form of sparse representation.With this representation,a series of stego-coding methods are obtained,among which the previously introduced matrix encoding may be viewed as a special case.It is then demonstrated that a suitable combination of different stego-encoding schemes can provide improved performance under a given ratio between the amount of host data and that of secret data,which is better than the performance of the matrix encoding and the running encoding schemes.