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A High-capacity Audio Watermarking Scheme in the Time Domain Based on Multiple Embedding

机译：基于多重嵌入的时域大容量音频水印方案

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摘要

This paper introduces a new multiple embedding technique for the design of a time domain audio watermarking scheme. The concept of multiple embedding is realized by exploiting the properties of Polar coordinate system. In fact, more than one marking space is obtained from the host audio where watermarks are embedded, i.e., the same set of samples is utilized to convey information of more than one message bit. This embedding technique enables this scheme to attain higher embedding capacity. During embedding, high audio quality is maintained by controlling distortion level of the sample groups which is later verified by the objective measurement of quality. Security of the proposed system is ensured by the random embedding positions and associated information which cannot be determined statistically without the secret key. Error correction code is also incorporated in this scheme to enhance its robustness against external attacks. At the detector, watermark extraction is performed by informed detection while utilizing correlation coefficient. Eventually, several signal manipulation attacks, according to different benchmarks, are applied to evaluate performance of the proposed scheme. The test results ensure high retrieval rate of the watermark message in most of the instances.
机译：本文介绍了一种新的多重嵌入技术，用于时域音频水印方案的设计。通过利用极坐标系的特性来实现多重嵌入的概念。实际上，从嵌入有水印的主机音频中获得了一个以上的标记空间，即，利用同一组样本来传递一个以上消息位的信息。这种嵌入技术使该方案可以获得更高的嵌入能力。在嵌入过程中，通过控制样本组的失真级别，可以保持较高的音频质量，随后可以通过客观测量质量来验证这一点。所提出的系统的安全性是通过随机嵌入位置和相关联的信息来保证的，这些位置和相关信息在没有密钥的情况下无法进行统计确定。纠错码也被合并到该方案中，以增强其抵抗外部攻击的鲁棒性。在检测器处，在利用相关系数的同时通过知情检测执行水印提取。最终，根据不同的基准，进行了几种信号操纵攻击，以评估所提出方案的性能。测试结果确保了大多数情况下水印消息的高检索率。

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