filter

DTMF(双音多频)是用两个特定的单音频组合信号来代表数字信号的一种编码技术。两个单音的频率不同，代表的数字或实现的功能也不同。可采用8种频率代表电话机上的16个按键，10个数字键0~9和6个功能键*、#、A、B、C、D。具体的频率组合见参考书。要求： (1) 根据键盘输入的符号，利用MATLAB产生对应的DTMF信号；(2) 分别利用FFT算法和Goertzel算法计算该DTMF信号的频谱并画出频谱图；(3) 根据频谱图确定DTMF信号所代表的符号是否和输入的符号一致。 (DTMF (Dual Tone Multi-Frequency) is a single with two specific combination of audio signals to represent a kind of digital signal coding techniques. Two monosyllabic different frequency, on behalf of the numbers, or the realization of the functions are also different. Eight kinds of frequency of use on behalf of telephone on the 16 keys, 10 numeric keys 0 ~ 9 and 6 function keys*,#, A, B, C, D. The frequency of specific composition of reference books. Requirements: (1) According to the keyboard input of symbols, the use of MATLAB have a corresponding DTMF signal (2), respectively, using FFT algorithm and the Goertzel algorithm DTMF signal spectrum and frequency spectrum draw (3) According to DTMF signal frequency spectrum to determine represented by symbols and input symbols unanimously.)

非常有用的希尔伯特黄变换的实例程序，包括各作图程序( Hilbert Huang Transform example program, including the mapping program)

there some matlab code for matlab algorithms it is very useful for design algorithms

description on Matlab of JEPG compression

傅立叶相位加密，用于图像加密，效果好，需要密钥图像，也在压缩包里。适用于灰度图象。(Fourier phase encryption for image encryption, which is good, need to key images, but also compressed bundle. Apply to the gray-scale image.)

基于边缘特征提取的HOG算法·可用于边缘特征提取(HOG feature extraction algorithm based on the edge of the edge can be used for feature extraction)

Implementation of the ISO15693 Protocol in the TI TRF796x

《高等应用数学问题MATLAB求解》的PDF版及习题解答(《Higher Applied Mathematics MATLAB to solve the problem》of the PDF version and answer exercises)

说明：  极其经典的小波包分解程序，奇异点检测，附图说明(Most classical wavelet packet decomposition process, singular point detection, photo description)

How to create a turing pattern.