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watermark_paper Downloaded：0: 首先将二值水印图像经过降维操作转化为一维序列,再将一维序列与m 序列做扩频调制,最后对音频信号进行分段离散余弦变换,把经过调制的水印信号经过量化处理过程嵌入到离散余弦变换后的系数中提取水印时对含水印信号的音频信号也进行分段离散余弦变换,然后利用原始音频信号提取水印. 实验证明了该技术的鲁棒性和不可感知性.
Date : 2025-07-16 Size : 175kb User : li
watermark_paper2 Downloaded：0: 摘　要: 为了提高盲检测数字水印算法的鲁棒性, 从同频DCT 系数间的线性关系着手, 结合人类视觉系统(HV S) 理论和JPEG 压缩的工作原理, 提出了一种简单易行数字水印算法. 该算法具有良好的不可见性, 能很好地抵抗JPEG 压缩, 是完全意义上的盲检测算法. 并通过与口令系统结合, 使只有合法用户才可正确检测出水印. 关键词: 数字水印 DCT 线性关系盲检测
Date : 2025-07-16 Size : 189kb User : li
watermark_paper3 Downloaded：0: A new chaotic sequence spread spectrum watermarking algorithm, a very good article
Date : 2025-07-16 Size : 570kb User : li
watermark_paper4 Downloaded：0: A new spread spectrum audio watermarking algorithm, a very good article of a digital watermark。
Date : 2025-07-16 Size : 130kb User : li
watermark_paper5 Downloaded：0: An application of digital watermarking algorithm for error correction coding, a very good article of a digital watermark
Date : 2025-07-16 Size : 144kb User : li
Objective-C Downloaded：0: Object C syntax reference, Simplified Chinese, ideal for novice reference!
Date : 2025-07-16 Size : 8kb User : wangyi
Java-language-program-design- Downloaded：0: Java language program design
Date : 2025-07-16 Size : 43.45mb User : 陈建峰
BTREE2 Downloaded：0: B tree，include insert , search, and delete
Date : 2025-07-16 Size : 8kb User : niujia
yanshi Downloaded：0: welcome
Date : 2025-07-16 Size : 129kb User : 杨娇
count Downloaded：0: time counter up to 1hr
Date : 2025-07-16 Size : 110kb User : jbma
LM3S Downloaded：0: The embedded learning materials based on LM3S8962
Date : 2025-07-16 Size : 5.76mb User : 杨娇
32009072118-(6) Downloaded：0: Network programming library system log, very good, oh, welcome to download
Date : 2025-07-16 Size : 36kb User : 赵刚

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