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This document contains information about frequency domain processing. details about 1-d,2-d fourier transform,inverse fourier transform,image enhancement techniques. contains some sample code and output also
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MFCC (Mel Frequent Cepstral Coefficient) in M-File.
epresentation of the short-term power spectrum of a sound, based on a linear cosine transform of a log power spectrum on a nonlinear mel scale of frequency.
MFCCs derived as follows:
1. Ta
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Perform Hilbert transform and calculate instantaneous magnitude and frequency.
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labview编写的求傅立叶变换的程序，输入信号的幅度、频率可以选择-labview write to seek Fourier transform procedure, the input signal amplitude, frequency can choose to
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gabor变换 用于时频分析 可以得到时频分析谱-gabor transform for time-frequency analysis can be time-frequency analysis spectral
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* Frequency domain filtering
-1. Discrete Fourier Transform
Write a C++ function for each of following:
(a) Multiply the input image by (-1)x+y to center the transform for filtering.
(b) Compute the two-dimensional discrete F
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短时傅利叶转换或短时傅利叶变换(英文：short-time Fourier transform, STFT，又称short-term Fourier transform)是和傅利叶转换相关的一种数学转换关系，用以决定时变讯号其局部段落之弦波成份的频率与相位。
-Short-time Fourier transform or short-term Fourier transform (in English: short-time Fourier transform, STFT, also kn
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基于小波包的带通滤波器设计程序。给出了小波变换的快速算法和重构算法，讨论了应用小波变换进行信号带通滤波的方法，并通过正交小波包对信号的分解，把频率成分复杂的信号分解到各个频带上，根据需要提取指定频率的信号，然后用小波包重构算法对信号进行重构，实现对信号的提取。-Based on wavelet packet band-pass filter design program. Given the fast algorithm of wavelet transform and reconstructi
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STFT 实现短时加窗 傅里叶 变换 分析
可用于跳频时频分析-STFT to achieve short time Fourier transform of windowed time-frequency analysis can be used for frequency hopping
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基于双低频小波变换和k近邻分类器的人脸识别算法源程序-Dual low frequency wavelet transform and k-nearest neighbor classifier based face recognition algorithm source
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语音信号的时域和频域特性，包括录制、计算短时能量、短时过零率、短时傅里叶变换、加矩形窗等步骤-Speech signal in time domain and frequency domain characteristics, including recording, computing time energy, short-time zero-crossing rate, short-time Fourier transform, rectangular windows and other s
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普通信号都是非线性信号，一般的傅里叶变换无法有效分析，这是利用小波变换方法进行的有效时频分析方法-Common signals are non-linear signal, generally can not be effectively Fourier transform analysis, which is carried out using wavelet transform time-frequency analysis method for the effective
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很好用的matlba时频变换工具箱，包含各种重要的信号源以及已经编写好的重要分布代码，类似魏格纳分布等等，有需要的欢迎下载。-Good use of the time-frequency transform matlba toolbox contains a variety of important sources and distribution of code already written an important, like Wigner distribution, etc., ther
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同样也是matlab时频变换工具包，包含各种重要的信号源以及已经编写好的重要分布代码，类似魏格纳分布等等，有需要的欢迎下载。-Good use of the time-frequency transform matlba toolbox contains a variety of important sources and distribution of code already written an important, like Wigner distribution, etc., ther
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很好用的matlab时频变换工具箱，包含各种重要的信号源以及已经编写好的重要分布代码，类似魏格纳分布等等，有需要的欢迎下载，由于源码数量很多，所以这是第三块儿。-Good use of the time-frequency transform matlab toolbox contains a variety of important signal sources and the distribution of the code already written an important, lik
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很好用的matlab时频变换工具箱，包含各种重要的信号源以及已经编写好的重要分布代码，类似魏格纳分布等等，有在研究信号的时频分布以及类似研究方向的同学，欢迎下载。-Good use of the time-frequency transform matlab toolbox contains a variety of important signal sources and the distribution of the code already written an important, li
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Butterworth Band reject filters remove or attenuate a band of frequencies about the origin of the Fourier transform. The aim is to enhance the image corrupted by sinusoidal noise using Butterworth band reject filter.
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C#实现话音/声音时域频域FFT实时可视化源代码-audio time and frequency transform code in c#
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时频变换工具箱,matlab版本，包含多种时频变换-Time-frequency transform toolbox, matlab version that contains a variety of frequency conversion
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S Transform matlab code for time-frequency analysis
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