一种基于三维幻矩阵的语音信息隐藏新方法
A novel method of speech information hiding based on 3D-Magic Matrix
摘要：
低速率语音的冗余信息非常少，因此在低速率语音上实现大容量隐写是非常困难的。基于语音编解码器中线谱对（LSP）的多重矢量量化特性，提出了一种利用3D-Magic矩阵的隐写算法，以扩大容量，提高语音质量。本文提出了一种用于隐写术的3D-Magic矩阵的循环移动算法，以及基于3D-Magic矩阵的隐写术在低比特率语音编解码器中的嵌入和提取算法。理论分析表明，该方案的隐蔽性和隐藏容量得到了很大的提高。实验结果表明，在ITU-T G.723.1编解码器中，隐藏容量提高到200 bps。此外，语音质量感知评价（PESQ）的隐写语音质量下降不超过4%，表明对语音质量的影响很小。此外，所提出的隐藏方案可以有效地防止被一些隐写分析工具检测到。
英文摘要：
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.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
