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中文摘要：
提出了一种新的非对称数字水印方案．该方案通过DCT—Ⅳ变换矩阵构造一个非满秩的线性矩阵，并利用该矩阵和嵌入水印生成非对称的检测水印．在水印检测阶段，先从加水印的载体信号提取特征向量，然后对该特征向量进行DCT—Ⅳ变换，最后利用检测水印和变换后的特征向量进行相关检测．理论分析和实验结果表明该非对称水印方案能够提供可靠的非对称检测，并且在非对称检测失败的情况下，对称检测能够检测到水印．
英文摘要：
A new asymmetric watermarking scheme is proposed. In this scheme, a non-full linear matrix constructed through the DCT-Ⅳ transform matrix is used to generate a detection watermark with an embedded watermark. During the watermark detection procedure, the feature vector is extracted from the watermarked signal firstly, and then it is transformed through the DCT-Ⅳ transform. In the end,the correlation detection is performed with the detection watermark and the transformed feature vector. Theory analysis and experimental results demonstrate that the asymmetric watermarking scheme can provide reliable asymmetric detection, and the symmetric detection can detect the embedded watermark when the asymmetric detection has failed.
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