tiaozhishibie

实现matlab中常用函数功能，只要将其加入进去，就可直接调用。 (Matlab function to achieve the commonly used features, as long as its accession into the call directly.)

基于离散余弦变换的数字水印，在图像的dct变换域中相应嵌入数字水印(Discrete cosine transform-based digital watermarking, the image of the dct transform domain watermark embedding corresponding)

说明：  关于可见光通信信道建模的有关对数正态pdf的MATLAB代码。(MATLAB code of lognormal PDF for modeling of visible light communication channel.)

说明：  卡尔曼滤波器是用前一个估计值和最近一个观察数据估计信号的值，他是用状态方程和递推的方法进行估计，本例用来追踪一个5阶的FIR不确定的滤波器系数。(Kalman filter is to use the previous estimate and the most recent observation data to estimate the value of the signal, he is using the state equation and recursive estimation methods, in this case is used to track a 5-order FIR filter coefficients of uncertainty.)

step respons of system cotinus and disecret

对实域信号加窗（矩形窗、汉明窗）做DFT分析信号频谱(The real field signal plus (rectangle window, hamming window) do DFT spectrum analysis)

pri变换分选算法仿真实现，改进经典PRI变换算法(PRI transformation algorithm)

产生任意相关系数的多路高斯分布的噪声，用于模拟信号处理的噪声环境。(Generate multiple channals of noise with arbitrary cross-correlation coefficient )

As all of you know, MATLAB is a powerful engineering language. Because of some limitation, some tasks take very long time to proceed. Also MATLAB is an interpreter not a compiler. For this reason, executing a MATLAB program (m file) is time consuming. For solving this problem, Mathworks provides us C Math Library or in common language, MATLAB API. A developer can employ these APIs to solve engineering problems very fast and easy. This article is about how can use these APIs.

voice box 语音识别箱 包含各种常用的语音处理程序(voice box voice recognition box)