mul

该程序实现多特征自适应阈值算法，两个matlab文件，一个为函数，该函数求出信号的特征量值并通过梯度下降法训练出其初始阈值，另一个为主函数，调用该函数文件；该程序将4路信号，每一路信号的特征量值及其自适应阈值求出来，并一起画出图来。(The program features multi-adaptive threshold algorithm, two matlab files, one for the function,the function seek out characteristics value and initial threshold value of the signal by gradient descent , the other main function, called the function file the program seek out four signals , characteristics of each road and the adaptive threshold value,then draw them together on the map.)

说明：  ：针对MP3 编码方式和帧结构进行分析，利用帧中的比例因子提出了一种压缩域水印算法。算法通过引入帧变化分析步 骤，很好地实现了水印的自适应嵌入。对于不同的系统要求，还可以通过修改门限信噪比的值SNRlim按需进行水印嵌入，使算法 具有更大灵活性。同时在牺牲一定的嵌入空间前提下，实现了水印信息的自同步。实验表明，对于不同风格的音乐，该水印算法 具有很好的不可听性。(In this paper，the encoding method and the frame structure of MP3 are expounded in detail，a watermark algorithm is proposed based on the scale factor in MP3 frame.By introducing the step of frame altering analysis，the algorithm can realize that watermarks is embedded adaptively.By modifying threshold SNRlim（the ratio of signal to noise），the algorithm can meet different requirements of some system，that is what enable the algorithm to have a bigger flexibility.Based on expense of some embedding positions，the watermark can be embedded with self-synchronization.The experiment results show this algorithm can get a good audio effect with various types of audio.)

tutorial on matlab signal processing commands

二元ldpc译码器 min-sum算法 迭代次数固定 输入信号长度一帧512bits(binary ldpc decoder. min-sum algorithm。fixed iter number.512 bits/frame)

matlab program for thinning an image

说明：  matlab基础教学系列5，一步步教学代码(the door to matlab)

MACHINE SYNCHRONE A AIMANT PERMANANT ALIMENTE CONNECTEE A UNE EOLIENNE

Listing program for LM35 temperature

This is a matlab code to simulate PAPR Vs CCDF of Selective Mapping (SLM) based Peak-to-Average power reduction of OFDM signal.

语音识别中求取LPCC系数，即语音信号的特征参数(Speech Recognition feature parameters strike LPCC coefficients, namely the speech signal)