Description: 对原始信号做DCT的算法：Cox 和Piva 等人提出的DCT技术的经典之作。Cox利用随机数发生器产生标准正态序列作为水印信息对图像进行整体DCT变换后，选取除去DC系数之外部分较低频率系数叠加水印信息 Piva则修改整幅图像的中频部分。对原始信号分块后，再作DCT的算法：Hsu和Wu 把图像进行8*8分块，将一个二进制序列作为水印放入DCT的中频区；有些学者则计算整个图像的DCT，把一个实数序列嵌入DCT的中频系数上。选择中频区的好处是一方面尽量减少嵌入信息对图像主观视觉的影响；同时，尽量避免有损压缩对水印信息可能带来的损失。还有一种DCT方法就是把水印信息嵌入到高频系数上，但是采用这种方法，抗压缩性非常差。-done to the original signal DCT algorithm : Cox Piva and others made the DCT technology classic. Cox using random number generator producing standard normal sequence information as a watermark image of the overall DCT, DC coefficient selection removed outside some lower frequency coefficient superposition watermark information Piva will be replaced by images of the entire IF part. The original signal block, before making the DCT algorithm : Wu Hsu and put images 8* 8 block, a binary sequence as watermarks Add DCT IF; Some scholars calculated whole image of DCT, a real sequence embedded IF DCT coefficients. IF the choice is a good one to minimize the embedded information to the subjective visual images; Meanwhile, try to avoid Compression right watermark information possible losses. There Platform: |
Size: 33792 |
Author:圣子到 |
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Description: 考虑幅值谱与相位谱的人造地震动模拟与反应谱拟合
我国对《建筑结构抗震规范》进行了修订，将设计反应谱周期由原来的3秒延长到现在的6秒。反应谱周期的延长。
本程序以新规范反应谱作为目标谱，采用三角级数迭加来模拟地震动加速度。-consider amplitude spectrum and phase spectrum of the artificial seismic simulation and pattern fitting response to China's "structural seismic code" the amendment to the design spectrum cycle from three seconds to extend the current six seconds. Response spectrum cycle extension. The new procedures to regulate spectrum as the target spectrum, the use of triangular series superposition to simulate vibration. Platform: |
Size: 2048 |
Author:wz |
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Description: 数字信号处理的应用之一是从含有加性噪声的信号中去除噪声。现有被噪声污染的信号x[k]=s[k]+d[k],式中： 为原始信号d[k]为均匀分布的白噪声。
（1）分别产生50点的序列s[k]和白噪声序列d[k],将二者叠加生成x[k],并在同一张图上绘出x0[k],d[k]和x[k]的序列波形。
（2）均值滤波可以有效去除叠加在低频信号上的噪声。已知3点滑动平均数字滤波器的单位脉冲响应为h[k]=[1,1,1 k=0,1,2],计算y[k]=x[k]*h[k],在同一张图上绘出前50点y[k],s[k]和x[k]的波形，比较序列y[k]和s[k]。
-digital signal processing applications from one containing additive noise signal denoising. Existing noise pollution was a signal x [k] = s [k] d [k], where : of the original signal d [k] uniform distribution of white noise. (1) have 50 points each sequence s [k] and white noise sequence d [k] superposition of the two generation x [k] and the same is likely to draw a map x0 [k] d [k] and x [k] waveform sequence. (2) mean filter can effectively remove superimposed on the low-frequency noise on the signal. 3:00 known moving average digital filter unit for pulse response h [k] = [k = 0,1,2 1,1,1] Calculation y [k] = x [k]* h [k], the same is likely to draw a map before 50 y [k] s [k] and x [k] waveform sequence comparison y [k] s and [k]. Platform: |
Size: 28672 |
Author:魏臻 |
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Description: 语音合成程序！psalo频域基音同步叠加方法。它首先对原始语音信号进行短时频域变换，得到短时谱和短时谱包络。短时谱除以短时谱包络得到声源短时谱，对声源短时谱的实部和虚部分别进行线性插值，就可以达到改变语音信号基频的目的，然后再进行频域反变换，可得到变换后的短时语音信号。短时谱包络部分也可以独立改变，以达到改变音色的目的。-speech synthesis procedures! Psalo frequency domain pitch synchronous superposition method. It is first of the original speech signal for short-time frequency domain transform, to be short-term and short-term spectral envelope spectrum. Short-term spectrum divided by the short-time spectral envelope of the sound source to be short-term spectrum of the sound spectrum of short-term real and imaginary parts of linear interpolation, they could change the voice-frequency signals to the end, then we will proceed to frequency-domain transform, Transform available after the short speech signal. Short-term spectral envelope can be independent of changes to achieve the objective of changing colors. Platform: |
Size: 2048 |
Author:hzh |
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Description: 一束光通过一个透明圆柱体，圆柱后有一个屏幕，程序最终反映屏幕上的
图象随圆柱半径的变化而变化。其中光强分布是采用相干叠加原理，因为其中采
样点数目不足，所以光强分布的结果和真实的有一定差距。增加采样点数目和改
变采样点范围能够改善输出光强的结果逼真程度。-一束光through a transparent cylinder, a cylindrical post-screen process will ultimately reflect the on-screen image with the cylindrical radius change. Light intensity distribution of which is the principle of coherent superposition, because the insufficient number of sampling points, so light intensity distribution of the results and have some real gaps. Increase in the number of sampling points and to change the scope of sampling points can improve the outcome of the output light intensity the degree of realism. Platform: |
Size: 6144 |
Author:周胜灵 |
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Description: 图片去噪：对一幅图像加入不同的噪声（随机点噪声、椒盐噪声等），选取不同的方法去噪，比如说邻域平均、中值滤波、图像迭加等，比较对于不同的噪声，不同的方法哪种更好-Image denoising: for an image by adding different noise (random-dot noise, salt and pepper noise, etc.), select a different method of denoising, for example, the neighborhood average, median filter, image superposition and so on, compared for different noise, different methods which better Platform: |
Size: 754688 |
Author:郑文 |
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Description: 文章详细阐述了数字通信系统中BER仿真的方法与步骤，给出了从发射机——信道——接收机整个过程的信号传输模拟的matlab实现方法，特别给出了高斯噪声的叠加方法，Eb/N0的计算与表述及误比特率的统计等，介绍了相应的matlab库函数，是一篇通信仿真入门的好文章。 -The article elaborated on the digital communication system BER simulation methods and steps, are given from the transmitter- channel- receiver of the process of matlab simulation of signal transmission method, especially given the superposition method of Gaussian noise, Calculation and expression Eb/N0 and BER statistics and so on, to introduce the corresponding matlab library function, is a good entry-communications simulation article. Platform: |
Size: 63488 |
Author: |
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Description: 在自适应信号的理想输入为有正弦信号。噪声输入也为一正弦信号。它们相互迭加，再经过LMS自适应算法，再比较它们的结果。-In an ideal adaptive signal has sinusoidal input signal. Noise input for a sinusoidal signal. Their mutual superposition, and then after LMS adaptive algorithm, and then compare their results. Platform: |
Size: 2048 |
Author:闫丰 |
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Description: 不定长信号合并，％执行信号相加： y(n) = x1(n)+x2(n)
％调用方式：[y,n] = sigadd(x1,n1,x2,n2)
％ y：叠加后的信号序列的序列号，包括n1和n2
％ x1： 第一个信号序列，序列号为n1
％ x2：第二个信号序列，序列号为n2(n2可以与n1不同)-Indefinite long-Signal merger, add up to the implementation of signal: y (n) = x1 (n)+ X2 (n) call the way: [y, n] = sigadd (x1, n1, x2, n2) y: Superposition signal sequence after the serial number, including the n1 and n2 x1: the first signal sequence, the serial number for n1 x2: the second signal sequence, the serial number for n2 (n2 with n1 different) Platform: |
Size: 1024 |
Author:vfory |
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Description: 拉普拉斯算子，检测图像的边缘纹理等细节信息，然后以适当比例线性叠加原始图像和细节信息，从而完成图像的增强-Laplace operator, the edge detection image texture details, etc., and then an appropriate proportion to the linear superposition of the original image and detail information to complete the image enhancement Platform: |
Size: 88064 |
Author:shen hong |
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Description: 考虑幅值谱与相位谱的人造地震动模拟与反应谱拟合 我国对《建筑结构抗震规范》进行了修订，将设计反应谱周期由原来的3秒延长到现在的6秒。反应谱周期的延长。 本程序以新规范反应谱作为目标谱，采用三角级数迭加来模拟地震动加速度-Consider the amplitude spectrum and phase spectrum of the artificial ground motion response spectrum simulation and fitting our anti-seismic construction norms, and the amendment to the design response spectrum cycle from three seconds to extend to the present six seconds. Response spectrum of the extended cycle. This procedure to a new standard response spectrum as the target spectrum, the use of trigonometric series of superposition to simulate ground motion acceleration Platform: |
Size: 2048 |
Author:ch |
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Description: ofdm.m为主程序，可以运行，将得到迭加噪声之后的误码率曲线，并与理论QPSK加高斯白噪声误码率曲线比较，两者将重合-ofdm.m-based program, you can run, will be after the noise superposition error rate curve, and with the theoretical QPSK plus white Gaussian noise bit error rate curves, which will coincide Platform: |
Size: 2048 |
Author:解玉芳 |
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Description: 数字通信系统中采用基带传输和频带传输[ 1, 2 ] ,在抽样判决器之前,信号叠加了信道噪声. 本文利用
Matlab软件仿真[ 3, 4 ]分析了在判决器前叠加了高斯噪声后,信噪比与系统的误码率之间的关系.-Digital communication system using baseband transmission and band transmission [1, 2], in a sample before the decision device, the signal superimposed on the channel noise. In this paper, Matlab software simulation [3, 4] of the device in the sentence before the superposition of the Gaussian noise After the SNR and BER relationship. Platform: |
Size: 125952 |
Author:zhujianbo |
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Description: gui界面实现解方程，分为三种：牛顿叠加法、二分法最速下降法。-gui interface to achieve solutions of equations, is divided into three types: Newton superposition method, steepest descent method dichotomy. Platform: |
Size: 6144 |
Author:牛晓亮 |
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Description: matlab课程大作业，共两个小程序，一个是根据shouming.txt 中的数据分析人均寿命分布情况；另一个是任意输入两个相向而行的波的幅度、频率、相位，观察这两个波叠加的动画，比如可以形成驻波、拍等典型的波-matlab course great job, a total of two small programs, one is based on shouming.txt life expectancy in the distribution of data analysis the other is the two meet each other halfway arbitrary input wave amplitude, frequency, phase, observation of these two waves superposition of the animation, such as to form a standing wave, making the typical wave Platform: |
Size: 3072 |
Author:chengyuanyuan |
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Description: 提出了一种鲁棒的多水印嵌入与检测算法,该算法基于小波域,且提取水印时不需要原始图像,保护了原始图像的安
全。在该多水印算法中,提出并使用了一种将密码学和常规的数字水印制作方法- - - 叠加法和量化调制法,有机结合起
来的新的方法,在水印嵌入时,不同的水印,生成与该水印相关的不同的密钥,在进行水印的提取时,用不同的密钥和待测的
图像提取出相应的水印。通过将密钥向第三方注册,可以获得对原始图像的所有权。-A robust multi-watermark embedding and detection algorithm, the algorithm based on wavelet domain, and extract the watermark without the original image, protect the safety of the original image. In the multi-watermarking algorithm, will be presented and used a conventional cryptography and digital watermarking production method--- superposition method and quantify the modulation method, combine the new method, the watermark embedding different watermark, associated with the watermark generating different keys, making extraction of the watermark when tested with a different image key and the corresponding extracted watermark. By the key to a third party registration, can be obtained ownership of the original image. Platform: |
Size: 618496 |
Author:切尔西 |
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Description: 灰色预测 基于一次叠加 级比检验 残差检验
小误差检验-Grey-level based on a superposition of small errors than residual test test test Platform: |
Size: 1024 |
Author:yangron |
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Description: 音频处理中合唱效果的实现，通过将输入信号分为两路，一路直接输入，一路延迟，最终叠加，实现合唱效果。-The effect of the realization of the audio processing in the chorus, the input signal is divided into two, all the way to direct input, all the way to delay final superposition chorus effect. Platform: |
Size: 6144 |
Author:封森 |
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Search - superposition matlab