Improved spread spectrum: a new modulation technique for robust watermarking
IEEE Transactions on Signal Processing
An efficient speech content authentication algorithm based on coefficients self-correlation degree
IWDW'12 Proceedings of the 11th international conference on Digital Forensics and Watermaking
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A novel dual watermarking scheme is presented that incorporates two watermarks in a host audio to achieve copyright protection and content authentication. The original audio signal is divided into four parts due to the segmented binary watermark image. Our technique introduces the wavelet packet coefficients to construct zero-watermarking and embed one watermark image block in each part by quantization which is different from the previous system. Moreover, it removes the process converting two-dimensional image to one-dimensional sequence. On one hand, experimental results demonstrate the robustness of zero-watermarking, exposed to a variety of common attacks, has improved. On the other hand, the semi-fragile watermarking can detect and localize malicious attacks in the form of block showing the tampering region of the original audio accurately yet tolerate mild modifications.