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/* DEscr iptION */
/* Measuring the signal to noise ratio of an audio signal using the */
/* TMS320C6416 DSK. Uses a sampling rate of 48000 Hz (48 kHz). */
/* */
/* Takes an input from a microphone or from a CD player and feeds */
/* straig
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该matlab程序实现了计算信号信噪比的功能-Matlab program to calculate the signal to noise ratio to achieve the function of
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用一个2阶的AR模型产生一平稳的随机过程s(n)。
其中， ， ， 可任意选定。
再产生一方差为 的白噪声 。接收信号为
，
要求对接收信号进行维纳滤波，输出信号为 。
1， 给定维纳滤波器的长度M，考察代价和函数与SNR之间的关系。
2， 给定SNR,考察代价函数与信噪比之间的关系。
3， 做一步预测，代价函数随滤波器的长度和信噪比的变化关系。
-With a 2-order AR model to generate a stationary rand
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For a file(.wave)
• Find the sampling frequency and the number of bits per sample.
• Re-quantize the samples using the following methods:
o Linear Quantization
o A-Law Companding with A=87.6
o μ-Law Companding with μ=255
•
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基于改进谱减法的语音增强，通过改进和传统的比较得出信噪比-Based on improved spectral subtraction speech enhancement, derived signal to noise ratio through improved and traditional
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ML estimation method can be a good signal to noise ratio, Complete class-based image processing, contains all of the source code, auto image, Through repeated training CEyjPrGlate have higher recognition rate.
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Through repeated training MrLrFSxlate have higher recognition rate, Accuracy can reach 98%, Including the final calculation of the compressed image peak signal to noise ratio and compression of the source.
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ML estimation method can be a good signal to noise ratio, Calculate the multifractal trend fluctuation analysis, LM386 audio signal amplification.
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