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Example6_2
- 用MATLAB实现对一语音信号用不同小波进行分解，提取各层的高低频系数，画出各系数波形，并重构。-MATLAB voice signal to a different wavelet decomposition, from the high levels of low-frequency coefficients. he painted the waveform coefficients, and Reconstruction.
Example2_4_1
- 用MATLAB对一图象分别用单尺度和二维小波分解，观察各高低频部分，对图象进行重构和压缩。-MATLAB image of a single yardstick were used and two-dimensional wavelet decomposition, the high-low frequency observation, right image reconstruction and compression.
Example2_6_1
- 用MATLAB对一图象分别用不同小波分解，观察高低频部分进行重构，比较重构误差，再进行阈值消噪，比较消噪前后图象。-MATLAB right one image with different wavelet decomposition, high-low-frequency observations for some remodeling, more reconstruction error and then de-noising, compared before and after image
freqhoppsprdspctrm
- 已知载波频率的扩频通讯MATLAB程序，通过扩展频率实现低信噪比的传输 -known carrier frequency of spread spectrum communication MATLAB program, through the expansion of low-frequency signal-to-noise ratio transmission
fir-low-pass-filter-design
- 用矩形窗设计了一个FIR线性相位低通数字滤波器。截止频率0.5π，阶数为21阶。求出了系统函数并画出了幅频响应。-A rectangular window design with linear phase FIR low-pass digital filter. Cutoff frequency 0.5π, the order of 21 bands. Find the system function and plotted the amplitude-frequency response.
Information-hiding
- 基于 DCT(离散余弦变换 )域的信息隐藏算法是目前应用最广的变换域算法 ,此类算法的最大不足是嵌信息量小。通过分析 DCT域隐藏算法隐藏容量少的原因 ,提出了一种大容量的 DCT域信息隐藏算法。算法首先对载体图像进行频谱均匀化处理 ,然后对图像进行全局 DCT变换 ,并将隐藏信息嵌入到载体图像的低频 DCT系数上 ,信息嵌入采用分段量化的方法实现 ,提取隐藏信息时不需要原始载体图像。实验结果表明 ,该算法的嵌入容量大 ,不可感知性好。-Based on DCT (discrete cosine
ECGSYNC-physionet
- ECGSYN generates a synthesized ECG signal with user-settable mean heart rate, number of beats, sampling frequency, waveform morphology (P, Q, R, S, and T timing, amplitude,and duration), standard deviation of the RR interval, and LF/HF ratio (a measu
Butterworth
- 内含巴特沃思滤波器（Butterworth）MATLAB代码，分高通与低通两种情况，并用mesh显示滤波器的三维图-Containing Butterworth filter (Butterworth) MATLAB code, sub-high-pass and low pass both cases, with mesh filter of three-dimensional map display
yuyin
- 语音信号的采集与处理，数字信号处理课设，可对已录制好的语音进行高中低频的滤波处理，并可现场录音处理，包含所有源代码，GUI，课设报告等。-Voice signal acquisition and processing, digital signal processing class- can be carried out on the high school has recorded the voice of low-frequency filter processing, recording
matlab1
- 我们知道，小波变换的一级分解过程是，原始信号分别进行低通、高通滤波，再分别进行二元下抽样，就得到低频、高频（也称为平均、细节）两部分系数；而多级分解则是对上一级分解得到的低频系数再进行小波分解，是一个递归过程。以下是一维小波分解的程序. -We know that a wavelet transform decomposition process is that the original signal were low-pass, high pass filter, and then
lpf
- 通过时域转换为频域，在频域中截取低频部分，去掉高频部分将结果再转换到时域以实现低通滤波的功能。-Through the time domain is converted to frequency domain, in the frequency domain low-frequency part of the interception, to remove high-frequency part of the results and then switch to the time domain
matlab
- 实验指导 低通采样定理实验 FFT频谱分析实验 IIR滤波器设计实验 窗函数法FIR滤波器设计 频率采样法FIR滤波器设计实验-Experimental guide low-pass sampling theorem FFT spectrum analysis experiment experiment experiment IIR Filter Design Window Function FIR filter design frequency sampling FIR filter desi
MATLABchebhigh2cheblow1
- 自己做的： （一）用双线性变换法设计并用实验系统实现一个三阶的契比雪夫Ⅰ型低通数字滤波器，其采样频率Fs =8KHz，1DB通带边界频率为fp=2KHz。 （二）用双线性变换法设计并用实验系统实现一个三阶的契比雪夫Ⅱ型高通数字滤波器，其采样频率Fs =16KHz，阻带边界频率为fst =4KHz，As=20dB。 -(A) design using the bilinear transformation method and the experimental system of a
Krakel
- 计算水声传播的Krakel程序，属于简正波的计算程序，计算低频声波传播时较适合-underwater acoustic propagting computing program, belong to Normal Mode program, nice when low frequency.
filter0
- Useing the MATLAB command remez to obtain a low pass filter z(n) with a cutof frequency of 40 Hz at a sample rate of 1000 Hz.
Linear_and_non
- Linear and non-linear approximation with wavelets Linear approximation is obtained by keeping M low frequency coefficients and then applying the inverse wavelet transform. Here we take M=n^2/4 by keeping n/2 x n/2 low frequency coefficients. Lin
logistic_dwt
- 】利用混沌动力学系统中logistic 映射先对水印图像进行置乱预处理以增强其鲁棒性, 在小波域中将原始音频信号按比例分段, 此比例为原始音频信号低频部分与水印信号个数之比, 然后将水印信号加入到音频信号的 低频部分。用StirMark 攻击后的实验结果表明, 该算法对StirMark 的部分攻击具有一定的鲁棒性。-The logistic- map sequences to encrypt the watermark are used. The original audio signal
filter
- 2个程序，MATLAB设计的一个滤波器，将含3个频率分量的信号通过该滤波器，滤除2个高频分量，得到只含低频的信号。 单边带信号调制，用MATLAB实现，是学习信号调制的一个好例子。-Two procedures, MATLAB design a filter, will contain three frequency components of the signal through the filter, filter out high frequency components of two
qiuxinhaoguiyihua
- 求生物信号的滤波和归一化程序，是低频信号的在bp中应用的一部分。-Seeking biological signal filtering and normalization procedures, low-frequency signals in the bp part of the application.
czf_blurcue
- In this paper, a multimodal image fusion algorithm based on multiresolution transform and particle swarm optimization (PSO) is proposed. Firstly, the source images are decomposed into low-frequency coefficients and high-frequency coefficients b