A Secure AMR Fixed Codebook Steganographic Scheme Based on Pulse Distribution Model

A Secure AMR Fixed Codebook Steganographic Scheme Based on Pulse Distribution Model
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基于脉冲分布模型的安全AMR固定码本隐写方案

DOI:
10.1109/tifs.2019.2905760
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发表时间:
2019-03
影响因子:
6.8
通讯作者:
Lina Wang
Lina Wang
中科院分区:
计算机科学1区
文献类型:
--
作者:
Yanzhen Ren;Hanyi Yang;Hongxia Wu;Weiping Tu;Lina Wang

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自适应多速率(AMR)是一种流行的音频压缩标准,广泛应用于移动的通信和移动的Internet应用中,成为一种新型的信息隐藏载体。为了提高统计安全性,提出了一种基于脉冲分布模型(PDM-AFS)的AMR固定码本(FCB)域隐写算法。通过消息编码和随机掩蔽来控制隐写音频中的脉冲位置,使FCB参数的统计分布接近于隐藏音频的统计分布。实验结果表明,该方案的统计安全性优于现有方案。与现有方案相比,该方案保持了隐藏容量。在12.2kbps的音频压缩率下,平均隐藏容量可达2.06kbps,具有较好的听觉隐藏效果。据我们所知,这是第一个安全的AMR FCB隐写方案,提高了统计安全性的基础上的覆盖音频的分布模型。该方案可以推广到代数码激励线性预测(ACELP)原理下的其他音频压缩编解码器,如G.723.1和G.729。
Adaptive multi-rate (AMR), a popular audio compression standard, is widely used in mobile communication and mobile Internet applications and has become a novel carrier for hiding information. To improve the statistical security, this paper presents a steganographic scheme in the AMR fixed codebook (FCB) domain based on the pulse distribution model (PDM-AFS), which is obtained from the distribution characteristics of the FCB value in the cover audio. The pulse positions in stego audio are controlled by message encoding and random masking to make the statistical distribution of the FCB parameters close to that of the cover audio. The experimental results show that the statistical security of the proposed scheme is better than that of the existing schemes. Furthermore, the hiding capacity is maintained compared with the existing schemes. The average hiding capacity can reach 2.06 kbps at an audio compression rate of 12.2 kbps, and the auditory concealment is good. To the best of our knowledge, this is the first secure AMR FCB steganographic scheme that improves the statistical security based on the distribution model of the cover audio. This scheme can be extended to other audio compression codecs under the principle of algebraic code excited linear prediction (ACELP), such as G.723.1 and G.729.
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