1 research outputs found
A novel method of speech information hiding based on 3D-Magic Matrix
Redundant information of low-bit-rate speech is extremely small, thus it's
very difficult to implement large capacity steganography on the low-bit-rate
speech. Based on multiple vector quantization characteristics of the Line
Spectrum Pair (LSP) of the speech codec, this paper proposes a steganography
scheme using a 3D-Magic matrix to enlarge capacity and improve quality of
speech. A cyclically moving algorithm to construct a 3D-Magic matrix for
steganography is proposed in this paper, as well as an embedding and an
extracting algorithm of steganography based on the 3D-Magic matrix in
low-bit-rate speech codec. Theoretical analysis is provided to demonstrate that
the concealment and the hidden capacity are greatly improved with the proposed
scheme. Experimental results show the hidden capacity is raised to 200bps in
ITU-T G.723.1 codec. Moreover, the quality of steganography speech in
Perceptual Evaluation of Speech Quality (PESQ) reduces no more than 4%,
indicating a little impact on the quality of speech. In addition, the proposed
hidden scheme could prevent being detected by some steganalysis tools
effectively.Comment: Accepted by Journal of Internet Technolog