Liu_Zhang_ISPRS2008_PV

一本很好的范畴书，基础研究工作者必读一本很好的范畴书，基础研究工作者必读。(The scope of the book a good, basic research workers must-read)

耳蜗实质上相当于一个滤波器组，耳蜗的滤波作用是在对数频率尺度上进行的，在1000HZ下，人耳的感知能力与频率成线性关系；而在1000HZ以上，人耳的感知能力与频率不构成线性关系，而更偏向于对数关系，这就使得人耳对低频信号比高频信号更敏感。Mel频率的提出是为了方便人耳对不同频率语音的感知特性的研究。频率与Mel频率的转换公式为(Cochlear substantially equivalent to a filter set, cochlear filter is used on logarithm frequency scale, under the 1000 hz, the perception of the human ear and a linear relationship with frequency In more than 1000 hz, the perception of the human ear does not constitute a linear relationship with frequency, and prefer to logarithmic relationship, which makes the human ear is sensitive to low frequency signal is better than high frequency signal. Mel frequency is put forward in order to facilitate the ear of the study of speech perception characteristics of different frequency. For frequency and Mel frequency conversion formula )

说明：  改进后的BP神经网络，可以用于模型的优化和预测(The improved BP neural network can be used for optimization and prediction models)

noise cancellation matlab m-files

very important reference for matalab

Test for A law decoder

ESQ measure: ------------- Usage of the PESQ objective measure is as follows: [pesq_mos]=pesqESQ measure------------- Usage of the PESQ objective measure is as follows: [pesq_mos]=pesq(cleanfile.wav,enhanced.wav) where cleanfile.wav contains the clean speech file and enhanced.wav contains the enhanced file. ------------------------- Loizou, P. (2007) "Speech enhancement: Theory and Practice", CRC Press. Any questions, please email: loizou@utdallas.edu.(ESQ measure------------- Usage of the PESQ objective measure is as follows: [pesq_mos]=pesq(cleanfile.wav,enhanced.wav) where cleanfile.wav contains the clean speech file and enhanced.wav contains the enhanced file. ------------------------- Loizou, P. (2007) "Speech enhancement: Theory and Practice", CRC Press. Any questions, please email: loizou@utdallas.edu)

matlab中常用代码集合，适合初学者学习参考。(matlab a collection of commonly used code, suitable for beginners to learn.)

for canny edge detection.

It is stbc 2x2 antenna configuration matlab code for wireless communication system.