High Capacity Reversible Data Hiding Algorithm for Audio Files Based on Code Division Multiplexing

Abstract

Aiming at the problem of small embedding capacity and low security of reversible data hiding algorithm for audio files,a reversible data hiding(RDH) algorithm for audio files based on code division multiplexing(CDM) is proposed in this paper.The orthogonal spreading sequences are employed to carry secret message.For reversible data hiding in the proposed scheme,they enable the original image can be recovered completely after the secret data having been extracted accurately.At the same time,according the orthogonal character of the embedding vector,the secret data can be overlapping embedded into the audio files and most elements of the sequence are mutually canceled in the process of the data embedding,and thus higher audio fidelity ability is obtained even at large data embedding capacity.Moreover,only the receiver who holds the same embedding vector as the sender can restore the embedded information and the original audio file losslessly,which improves the security performance of the algorithm effectively.Experimental results show that,compared with other audio reversible data hiding algorithms,the CDM based reversible data hiding (RDH) algorithm of audio file can achieve higher data embedding capacity at same audio distortion.

Keywords

• reversible data hiding(rdh)|audio files|code division multiplexing(cdm)|high capacity