visioconferencemobile

noise power estimation

书名为:<MATLAB实用教程> 主编:苏金明,阮沈勇. (Title: <MATLAB实用教程> editor: Su Jin-ming, RUAN Shen-yong.)

用Matlab程序实现P阶Levinson-Durbin算法。以一个2阶自回归模型（参数为b0=1, a1=0, a2=0.81）和一个2阶滑动平均模型（参数为b0=1, b1=1, b2=1）为例，选取观测数据长度为1000，分别用一个AR(2)模型和一个AR(10)阶模型来估计其功率谱。设激励信号模型的高斯白噪声的均值为0，方差为1。用Levinson-Durbin算法迭代计算AR模型参数，并用估计出的AR模型参数画出观测信号的功率谱。并对Levinson-Durbin算法的性能进行分析。(Write a small MATLAB program that implements the pthorder Levinson-Durbin (L-D). Run/Test the program using a AR(2) process (b0=1,a1=0, a2=0.81) and an MA(2) (bn=1,1,1) process-about 1000 samples. Use L-D with p=2 (for the AR) and 10 (for the MA). Plot the AR spectra produced in the two cases with L-D. List the direct form and the reflection coefficients in a table. Profile the L-D (total number of computations for a pthorder)

有循环检测，周期性检测，部分实现了追踪测速迭代松弛算法，内含心电信号数据及运用MATLAB写的源代码。( There are cycle detection, periodic testing, Partially achieved tracking speed iterative relaxation algorithm, ECG data and includes source code written in MATLAB.)

说明：  将一系列图象转换成avi电影，使用matlab编程．(will be converted into a series of images avi film, the use of Matlab programming.)

matlab code (kMean.m) used kMean, clusturing. for Speech Recognition

MATLAB实现的HOUGH变换直线提取(MATLAB implementation of the HOUGH transform line extraction)

超声图像信号的模拟程序，可模拟不同频率、不同深度等情况(Simulation program for ultrasound,including different central frequency,depth,and so on.)

matlab时频分析工具箱，包括各种时频分析函数(matlab time-frequency analysis toolbox, including a variety of time-frequency analysis functions)

说明：  FIR和IIR滤波器，低通，高通，带通，附带注释(FIR and IIR filter, low-pass, high-pass, band-pass, with comments)