用于版权保护与内容认证的半脆弱音频水印算法

A Semi-fragile Audio Watermarking for Copyright Protection and Content Authentication

提出了一种可同时用于版权保护与内容认证的半脆弱数字音频肓水印算法.该算法具有以下特点:1)结合音频自身特性,不仅能够自适应划分音频数据段,而且能够智能调节水印嵌入强度,增强了数字音频水印的鲁棒性;2)能够同时进行数字音频的版权保护与内容认证,并可大致确定篡改发生区域.仿真实验表明,文中算法不仅具有较好的不可感知性,而且对常规处理具有较好的鲁棒性,同时能够对替换等恶意篡改作出报警并确定被篡改位置.

Semi-fragile watermarking methods aim at detecting unacceptable malicious manipulations, while allowing for acceptable regular manipulations such as lossy compression. In this paper, a semi-fragile audio watermarking algorithm for copyright protection and content authentication is proposed. The features of the proposed algorithm are as follows： 1） The original audio signal can be adaptively divided, and the watermark depth can be intelligently adjusted according to human auditory masking and local audio character; 2） The copyright protection and content authentication for digital audio can be utilized simultaneously. Experimental results show that our semi-fragile audio watermarking scheme is not only inaudible and robust against various common images processing, but also fragile to malicious modification. Especially, it can detect effectively the tampered regions.