Description: 端点检测是指用数字处理技术来找出语音信号中的各种段落（如音素、音节、词素、词等）的始点和终点的位置。语音段起止端点检测是语音分析、语音合成和语音识别中的一个必要环节。传统的端点检测方法是从wav文件中获取语音采样，将其分帧并计算短时能量和过零率参数，然后进行端点检测。这种工作方式被称为离线处理方法 ，无法实现语音信号的实时处理，对于语音信号分析具有一定的局限性。本文通过开发ActiveX控件，在MATLAB环境下将其嵌入到figure窗口中，以GUI程序的方式使用，实现语音信号端点检测的实时处理。-Endpoint detection is the use of digital processing techniques to identify the speech signals in a variety of paragraphs (such as phoneme, syllable, morpheme, word, etc.) the starting point and the end position. Speech endpoint detection is a paragraph beginning and end speech analysis, speech synthesis and speech recognition of a necessary link. Traditional endpoint detection method is to obtain from the wav file voice sampling, its sub-frame and calculate the short-term energy and zero-crossing rate parameters, and then proceed to endpoint detection. This work is called off-line approach can not achieve real-time speech signal processing, analysis of the speech signal has a certain limitations. In this paper, through the development of ActiveX controls, in the MATLAB environment to embedded figure window to use GUI program, the realization of speech signal processing real-time endpoint detection. Platform: |
Size: 30720 |
Author:cike |
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Description: 基于感兴趣区的零数字水印的算法及检测算法。-Region of interest based on the zero-digital watermarking algorithm and detection algorithm. Platform: |
Size: 998400 |
Author:马新悦 |
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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: Owing to the broad application value of audio
watermarking in remote transmission and mobile
extraction, it is very important to study watermarking
approaches against A/D and D/A conversion. Based
on wavelet decomposition and cepstrum technology,
an audio watermarking algorithm is proposed where
the low-frequency wavelet coefficients are chosen for
cepstrum transforming. Then, the obtained cepstrum
data shows stable for watermark hiding by the
methods of edging data cutting and statistical mean
modification. The synchronization is not required in
the algorithm. Experimental results show that the
proposed algorithm can resist on the attack of A/D
and D/A successfully with features of large capacity
and zero bit error. It will be helpful for the mobile
audio in secure broadcast and management in the Platform: |
Size: 207872 |
Author:vinay |
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Description: Owing to the broad application value of audio
watermarking in remote transmission and mobile
extraction, it is very important to study watermarking
approaches against A/D and D/A conversion. Based
on wavelet decomposition and cepstrum technology,
an audio watermarking algorithm is proposed where
the low-frequency wavelet coefficients are chosen for
cepstrum transforming. Then, the obtained cepstrum
data shows stable for watermark hiding by the
methods of edging data cutting and statistical mean
modification. The synchronization is not required in
the algorithm. Experimental results show that the
proposed algorithm can resist on the attack of A/D
and D/A successfully with features of large capacity
and zero bit error. It will be helpful for the mobile
audio in secure broadcast and management in the Platform: |
Size: 199680 |
Author:vinay |
Hits:
Description: Owing to the broad application value of audio
watermarking in remote transmission and mobile
extraction, it is very important to study watermarking
approaches against A/D and D/A conversion. Based
on wavelet decomposition and cepstrum technology,
an audio watermarking algorithm is proposed where
the low-frequency wavelet coefficients are chosen for
cepstrum transforming. Then, the obtained cepstrum
data shows stable for watermark hiding by the
methods of edging data cutting and statistical mean
modification. The synchronization is not required in
the algorithm. Experimental results show that the
proposed algorithm can resist on the attack of A/D
and D/A successfully with features of large capacity
and zero bit error. It will be helpful for the mobile
audio in secure broadcast and management in the Platform: |
Size: 346112 |
Author:vinay |
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Description: 为了实施图像的版权保护,提出了一种基于Zernike不变矩的零水印算法。利用Zernike矩幅度的旋转不
变性提取图像特征点,将特征点通过设定的阈值量化为二值序列作为零水印保存到零水印信息库( IPR) 。证明版权
利用Zernike矩提取待检测图像特征点,以同样的阈值量化为二值水印序列与零水印作相关性检测。实验结果表明,
该方法很好地解决了传统水印鲁棒性和不可感知性的矛盾问题,对常用的图像处理和几何攻击具有较好的鲁棒性。-In order to imp lement the p icture copyright p rotection, this article p roposed a zero watermarking algorithm
based on the Zernike moments. The rectangular revolves invariability of Zernike moments was used to withdraw p icture
characteristic point, and quantified it for the binary sequence as the zero watermarking. The other image used the samemethod
to extract its feature and quantify for the binary sequence. Then comparison to zero watermarking was made to p roof the
copyright. The result indicated thismethod is very good to solute the contradictory question of robustness and impercep tibility Platform: |
Size: 380928 |
Author:ll |
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Description: 一种基于混沌系统和奇异值分解的
零水印算法
改变了传统通过修改图像内容进行版权保护的做法，描述了一种基于混沌理论和奇异值分解（’()*+,-. /-,+0
1023453’()*，678）的零水印方案；利用了93*(’:(2 混沌系统的初值敏感性映射信息隐藏的位置，增强了算法的安全
性；采用了奇异值的不变特性构造注册中心的水印，保证了在不改变宿主图像任何信息的同时进行有效地版权保
护；将有意义的二值图像作为水印图像，解决了零水印方案水印为无意义二值序列的问题；同时深入分析了水印容
量和算法安全性之间的关系 通过对标准测试图像、卡通、医学、风景、遥感、诗画等图像进行实验测试以及和其他
算法比较表明，该算法简单有效，适用性强，而且对滤波、噪声、<=>? 压缩、剪切等攻击表现出了较强的鲁棒性 -A novel zero bit watermarking algorithm based on logistic chaotic system and singuar value decomposition. Platform: |
Size: 275456 |
Author:li |
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Description: 提出了基于Contourlet变换的数字图像水印算法。与小波变换不同的是，Contourlet变换采用类似于线段
（contour segment）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。在采用零均值广义高斯分布拟合 Contourlet 变换系数的基础上，提出采用极大似然估计
实现水印的盲检测。依据 Neyman-Pearson 准则，在给定虚警率的情况下对判决准则进行了优化。实验结果表明
在保证水印隐蔽性的前提下，水印对常见的信号处理手段以及几何变换具有很好的稳健性-Contourlet transform is proposed based on digital image watermarking algorithm. The difference is that with the wavelet transform, Contourlet transformation similar to that of line (contour segment) of the base by a multi-resolution, localization, directional image representation. Watermark-based content of the program is loaded into Contourlet by transform coefficients. The introduction of zero-mean generalized Gaussian distribution fitting Contourlet transform coefficient based on maximum likelihood estimation proposed by the blind watermark detection. Based on Neyman-Pearson criterion, the false alarm rate in a given case to the sentencing guidelines were optimized. The results show that the watermark hidden in the guarantee under the premise of the watermark signal processing means of the common geometric transformations and is robust Platform: |
Size: 134144 |
Author:betty |
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Description: 对水印图像进行置乱，然后嵌入到载体图像小波域中的细节子带中-the watermark image is Scrambled, and then embedded into the details of wavelet sub-band domain Platform: |
Size: 872448 |
Author:yhtppp |
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Description: 离散小波变换和零树编码在数字水印中的应用研究-Discrete wavelet transform and zero tree coding in digital watermarking Platform: |
Size: 828416 |
Author:Lily |
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Description: 本代码是一种基于小波的零水印算法，算法在小波域进行水印的嵌入，并进行了鲁棒性测试-zero-watermarking based on wavelet -watermarking based on wavelet Platform: |
Size: 70656 |
Author:张晓婷 |
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Description: DCT域图像隐藏，基于DCT系数关系的图像水印算法，88分块后比较选定的两个系数的大小以此来隐藏1或者0.-DCT domain image hiding, based on the relationship between the DCT coefficients image watermarking algorithm, 88 blocks selected after comparing the size of the two coefficients in order to hide one or zero. Platform: |
Size: 397312 |
Author:hua |
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Description: 基于小波变换的零水印算法，包括水印的嵌入及提取，用到了阿诺德变换-Zero-watermarking algorithm based on wavelet transform, including the watermark embedding and extraction, use Arnold transformation Platform: |
Size: 3072 |
Author:傅新星 |
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Search - zero watermarking