senqai

this file is for mfcc extraction

The (a) section of Figure 1 illustrates the Line Echo Canceller (LEC) residing in the access network where echoes occur. Other voice processing modules, such as Automatic Level Control (ALC) and Noise Reduction (NR), are shown merely for illustration purposes. On the terminal side, both acoustic and electrical echo can occur. If the voice terminal is a speaker telephone set with an open acoustical path from the speaker to the microphone, the effect of acoustical echo is combined with the effect of the network echo. Because there is only a miniscule delay between the electrical signal and its echo, the speaker/listener is exposed to an effect known as side tone. Typically, instead of mounting a LEC at the terminal, side tone circuitry is placed to control the amount of the returned energy. The (b) section of Figure 1 shows examples of echo canceller signals representing the following:

对比各种小波变换的效果，B为输入的原始数据，需要自己添加数据并设置为B(Comparative effects of various wavelet transform, B is the input original data, and the data they need to be added to B)

通过KL变换实现特征提取从而达到表情识别以及人脸识别的目的(By KL Transform feature extraction so as to achieve the purpose of face recognition and face recognition)

This code is used to simulation of bed load transport in two phase flow domain.

用PCA主成分分析進行錯誤訊號分離 可應用在晶圓製程資料的分析(PCA principal component analysis of the error signal separation can be applied to the wafer process data analysis)

MATLAB code for filtering taking floating filter coefficients

这是在数值计算时经常用的样条插值的程序，能够在在MATLAB环境下直接运用。(This is the numerical calculation frequently used spline interpolation procedures in the MATLAB environment direct use.)

程序模拟了均匀光栅的反射谱特性、色散特性和时延特性(Program to simulate the reflection spectrum in uniform grating dispersion characteristics and delay characteristics)

一种matlab匹配算法，计算图像的7个不变矩 (A matlab matching algorithm to calculate the images of seven invariant moments)