A Complex Cepstnim Fragile Audio Watermarking Algorithm Based on Quantization

摘要

The paper proposed a complex cepstrum domain fragile audio watermarking algorithm based on quantization, by analyzing the effect of complex cepstrum direct current coefficient's change to time domain audio signal. Quantized length of the algorithm was calculated by the expression of signal-to-noise ratio. According to audio auditory quality requirements, it needn't experiments again and again to gain proper quantization length. The different simulation method with the present cepstrum domain watermark scheme was used and experiment results different from with the present robust watermarking was gained: fragile audio watermarking. Experimental results showed the algorithm is fragile to common signal process and cropping attacks. The algorithm is adapt to signal integrity authentication.