Description: 这是对音频信号进行bch编码后进行嵌入水印的程序-This is the audio signal BCH coding embedded watermark after the procedure Platform: |
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Author:尹超 |
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Description: 彩色图像的篡改检测及自恢复算法赵春晖，孙建军，朱海峰(哈尔滨工程大学信息与通信工程学院，黑龙江哈尔滨150001)摘要：数字水印是图像认证的有效手段之一．利用小波变换提出一种计算简单的彩色图像水印算法，将一个图像的主要内容嵌入该图像自身之中，用均值量化的方法在亮度信号中嵌入水印，实现篡改检测和定位篡改区域；用多余的色度空间嵌入亮度信号和色度信号，用于恢复被篡改的图像内容．该算法可以获取较高的峰值信噪比，具有很好的鲁棒性．实验结果表明，该算法对删除、替换等恶意图像篡改具有良好的检测、定位和自修复能力．-color image tamper detection and self-recovery algorithm Zhao Chunhui, Sun Jianjun, Zhu Haifeng (Harbin Engineering University, Information and Communication Engineering Institute, Harbin, Heilongjiang 150001) Abstract : digital watermark image authentication is one of the effective means. Using wavelet transform A simple calculation of the color image watermarking algorithm, an image of the main elements embedded in the image itself, and use of quantitative methods mean the luminance signal embedded watermark, achieve tamper detection and localization tampering with the region; use of surplus space embedded color luminance signals and chrominance signals, for the restoration of tampering with the image content. The algorithm can generate a higher signal-to-noise ratio of the peak value, h Platform: |
Size: 237568 |
Author:ghostsx |
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Description: 向音频信号加入伪随机序列的的音频水印源码-to the audio signal to the pseudo-random sequence of audio watermarking FOSS Platform: |
Size: 1024 |
Author:李若 |
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Description: 转载音频信号的数字水印相关论文,打包下载.-Reproduced audio signal of the digital watermarking-related papers, packaged download. Platform: |
Size: 10868736 |
Author:jht1002 |
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Description: 数字水印技术是指用信号处理的方法在数字化的多媒体数据中嵌入隐蔽的标记，这种标记通常是不可见的，只有通过专用的检测器或阅读器才能提取。数字水印在信息隐藏及图象隐藏方面有着极为广泛的应用。-Digital watermarking technology is that by using the method of signal processing in the digital multimedia data embedded hidden tag, this tag is not usually visible only through a dedicated detector or reader can be extracted. Digital Watermarking and Information Hiding in the hidden image has a very wide range of applications. Platform: |
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Author:周狼 |
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Description: 由高斯正态分布序列产生 ，经（7，4）汉明编码，得到水印信号。能抵抗压缩 滤波等攻击-Sequence generated by the Gaussian normal distribution, with (7,4) Hamming code, the watermark signal. Resistant to compression filtering attack Platform: |
Size: 9216 |
Author:zhangyiyi |
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Description: Firstly, research on robust image watermarking. A digital watermarking scheme based on wavelet transform was proposed. It realizes the watermarking extract without the original image using 64×64×8 bit gray image as the watermark signal. In order to enhancing the security of the watermark, we employ an encryption technology based on chaos and bit plan. Simulation results show that our scheme have good invisibility and can survive low-quality JPEG compression, median filtering and so on. In addition, the analysis of the extracted watermark can help us to detect and localize tampers.-Firstly, research on robust image watermarking. A digital watermarking scheme based on wavelet transform was proposed. It realizes the watermarking extract without the original image using 64 × 64 × 8 bit gray image as the watermark signal. In order to enhancing the security of the watermark, we employ an encryption technology based on chaos and bit plan. Simulation results show that our scheme have good invisibility and can survive low-quality JPEG compression, median filtering and so on. In addition, the analysis of the extracted watermark can help us to detect and localize tampers. Platform: |
Size: 102400 |
Author:xiaxianming |
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Description: Watermarking, as an important embranchment of information hiding, is the effective means for protect copyrights piracy. It can identify the signal’s integrity or property through embedding of additional information into multimedia signal.-Watermarking, as an important embranchment of information hiding, is the effective means for protect copyrights piracy. It can identify the signal s integrity or property through embedding of additional information into multimedia signal. Platform: |
Size: 1024 |
Author:xiaxianming |
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Description: matlabf非常好基于Contourlet变换的水印算法.与小波变换不同的是Contourlet变换采用类似于线段（contoursegment的基得到一种多分辨、局部化、方向性的图像表示。水印信号通过基于内容的乘性方案加载到Contourlet 变换系数-matlabf very good Contourlet Transform-based watermarking algorithm. and wavelet transform is different Contourlet transform similar segment (contoursegment the base to be a multiresolution, local and express direction of the image. watermark signal by the adoption of content-based programs loaded into Contourlet transform coefficients Platform: |
Size: 477184 |
Author:ddsdsds |
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Description: MP3音频流数字水印方案，试验表明该方案能得到较高的嵌入容量，对原始音频信号的改变较小，具有较好的隐形性，完整水印提取时间短，可以在音频播放过程中同步完成。通过对算法的进一步研究，我们发现可以利用插件技术将算法嵌入了当前的主流播放器中，从而实现水印信息的实时嵌入和提取。这可能成为保护网络音频版权、网络秘密通讯的一种可行的、低成本的解决方案。
-MP3 audio streaming digital watermarking program, experiments show that the program can be embedded in a higher capacity, the original audio signal changes in smaller, has better stealth, and integrity of the watermark extraction time is short, you can sync audio player to complete the process. Algorithm by further studies, we found that plug-in technology can make use of the algorithm embedded in the mainstream of the current players in order to achieve real-time information watermark embedding and extraction. This may be the protection of network audio copyright, secret communications networks as a viable, low-cost solution. Platform: |
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Author:aie |
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Description: 《语音信号处理课程专题练习>>,是语音信号处理,如语音识别,音频水印方面的理论基础.-" Speech signal processing thematic curriculum practice> > is the voice signal processing, such as speech recognition, audio watermarking theoretical foundation. Platform: |
Size: 5120 |
Author:hj |
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Description: wavelet based watermarking with dwt2 function in matlab it s an implementaton of an ieee paper.its a visible watermark it calculates the peak signal to noise ratio and the mean square error Platform: |
Size: 1024 |
Author:peed |
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Description: 对音频信号分帧加窗,对每帧进行三阶小波变换,取其逼近系数平均值(一般为零).在此嵌入二值图像 并有对潜入水印信号进行盲检,恢复其嵌入水印-Sub-frame of the audio signal increases the Hamming window for each frame impletment third-order wavelet transform, whichever is close to the average coefficient (usually zero). according to this embedding binary image and resume its embedded watermark from the watermark signal by the Blind detection Platform: |
Size: 2048 |
Author:wangyapeng |
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Description: 基于回声隐藏的信息隐藏算法，是一种音频信号的水印技术，包括隐藏信息的嵌入和提取，以及对于噪声，MP3压缩，滤波，重采样和延迟攻击的模拟。-Based on echo hiding information hiding algorithm, is an audio signal watermarking techniques, including embedding and extracting hidden information, as well as for noise, MP3 compression, filtering, resampling and delay attack simulation. Platform: |
Size: 529408 |
Author:张小小 |
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Description: ：针对MP3 编码方式和帧结构进行分析，利用帧中的比例因子提出了一种压缩域水印算法。算法通过引入帧变化分析步
骤，很好地实现了水印的自适应嵌入。对于不同的系统要求，还可以通过修改门限信噪比的值SNRlim按需进行水印嵌入，使算法
具有更大灵活性。同时在牺牲一定的嵌入空间前提下，实现了水印信息的自同步。实验表明，对于不同风格的音乐，该水印算法
具有很好的不可听性。-In this paper，the encoding method and the frame structure of MP3 are expounded in detail，a watermark algorithm
is proposed based on the scale factor in MP3 frame.By introducing the step of frame altering analysis，the algorithm
can realize that watermarks is embedded adaptively.By modifying threshold SNRlim（the ratio of signal to noise），the algorithm
can meet different requirements of some system，that is what enable the algorithm to have a bigger flexibility.Based on expense
of some embedding positions，the watermark can be embedded with self-synchronization.The experiment results show
this algorithm can get a good audio effect with various types of audio. Platform: |
Size: 1386496 |
Author:郑杨 |
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Description: 在保密数据传递等应用中，有时采用将一句话或一段文字或一段音乐隐藏在另一段音乐中，然后利用专门的算法来提取所传的信息-Data transfer in applications such as security, sometimes using the word or a text or a piece of music hidden in another section of music, and then use a special algorithm to extract the information transmission Platform: |
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Author: |
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