Description: 这是一个对语音信号(0.3kHz~3.4kHz)进行低通滤波的C语言程序， 低通滤波的截止频率为800Hz，滤波器采用19点的有限冲击响应FIR滤波。 语音信号的采样频率为8kHz，每个语音样值按16位整型数存放在insp.dat文件中。-This c program is a low pass filter for radio signal 0.3kHz-3.4kHz.The stop frequence of this
filter is 800hz.This digtal filter chooses 19 points FIR.the fs is 8kHz.every datas is memoryed in filed-insp.dat. Platform: |
Size: 1269 |
Author:郑涛 |
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Description: 数字带通滤波器的设计过程。共3个源程序。其中，dos.cpp为带通FIR的源程序，其中的滤波器阶数n，滤波器的低频fln，滤波器的高频fhn，窗函数w，可以按照自己的要求改变。这里采用的是汉宁窗。主函数main.cpp实现输入与fir的h(n)的卷积，输出结果Y(n)，并将其存储在y.txt中。最后，graphics.cpp从y.txt读取数据，再由语句画出波形，可以清楚地看出计算结果是否正确，并进行比较。-digital band-pass filter design process. A total of three sources. Among them, dos.cpp FIR bandpass to the source, the filter order n, the low-frequency filter FLN, the high-frequency filter fhn, window function w, in accordance with the requirements change. Here is the Hanning window. The main function main.cpp achieve the input and fir h (n) convolution, the output Y (n), and store them in y.txt China. Finally, graphics.cpp y.txt read data from and then draw waveform statement, we can clearly see whether calculations are correct, and comparisons. Platform: |
Size: 2048 |
Author:feide |
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Description: 这是一个对语音信号(0.3kHz~3.4kHz)进行低通滤波的C语言程序， 低通滤波的截止频率为800Hz，滤波器采用19点的有限冲击响应FIR滤波。 语音信号的采样频率为8kHz，每个语音样值按16位整型数存放在insp.dat文件中。-This c program is a low pass filter for radio signal 0.3kHz-3.4kHz.The stop frequence of this
filter is 800hz.This digtal filter chooses 19 points FIR.the fs is 8kHz.every datas is memoryed in filed-insp.dat. Platform: |
Size: 1024 |
Author: |
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Description: 在VC下实现FFT对信号滤波,包括实现低通和带通滤波,图形显示-In VC to achieve FFT of signal filtering, including the realization of low-pass and band-pass filtering, graphical display Platform: |
Size: 1963008 |
Author:刘以续 |
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Description: //在单片机系统中常用的滤波算法
（1）程序判断法（2）中值滤波法
（3）算术平均滤波法
（4）加权平均滤波法（5）滑动平均滤波法
（6）低通滤波法（7）中位值平均滤波
-//In the single-chip microcomputer system used in the filtering algorithm [1] procedures to determine law [2] Median Filter Method [3] arithmetic mean filtering method [4] the weighted average filtering method [5] moving average filtering method [6] low pass filter method [7] the median average filtering Platform: |
Size: 1024 |
Author:田亮 |
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Description: IIR滤波器的实现，这是一个低通滤波器,在visualC++6.0上的软件上实现
-The realization of IIR filter, this is a low-pass filter, in visualC++6.0 on the realization of software Platform: |
Size: 3496960 |
Author:林萍 |
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Description: We have to design a second order Butterworth filter having a sampling frequency of 20 kHz and -3db cut of frequency at 2 kHz in visual C. Only low frequency signals can pass through this filter and the signals having the frequency higher than frequency called cut off frequency get attenuated by this filter. we will use bilinear transform which is one of the most efficient way of converting a analogue filter to digital filter, we will convert the given transfer function from Laplace transform to z-transform and then we will realize poles and zeroes in the z-domain. And their corresponding frequency response.-We have to design a second order Butterworth filter having a sampling frequency of 20 kHz and-3db cut of frequency at 2 kHz in visual C. Only low frequency signals can pass through this filter and the signals having the frequency higher than frequency called cut off frequency get attenuated by this filter. we will use bilinear transform which is one of the most efficient way of converting a analogue filter to digital filter, we will convert the given transfer function from Laplace transform to z-transform and then we will realize poles and zeroes in the z-domain. And their corresponding frequency response. Platform: |
Size: 447488 |
Author:Mak_m |
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Description: Script to design an IIR Filter low pass using Butterworth & lineal transformation to convert
from analogic to digital a prototype filter.
by actinio vjgonzalezg@gmail.com :)
It plots:
1-Frecuency response of the filter impulse.
2-Magnitude response of the filter.
3-phase of the frecuency response.
4-Error of aproximation in bands.
It determines error of máximun aproximation on each band and the RMS value for the reject and pass band respectively
then, obtains plots of the first 50 samples for the following entries:
a)An rectangular pulse as the half of the longitud of the filter in n=0
b)A senoidal wave with amplitude =1 & frecuency 0.2 Fs.
c)A senoidal wave with amplitude = 1. & frecuency= 0.25 Fs.
d)A senoidal wave with amplitude = 1. & frecuency= 0.375 Fs.-Script to design an IIR Filter low pass using Butterworth & lineal transformation to convert
from analogic to digital a prototype filter.
by actinio vjgonzalezg@gmail.com :)
It plots:
1-Frecuency response of the filter impulse.
2-Magnitude response of the filter.
3-phase of the frecuency response.
4-Error of aproximation in bands.
It determines error of máximun aproximation on each band and the RMS value for the reject and pass band respectively
then, obtains plots of the first 50 samples for the following entries:
a)An rectangular pulse as the half of the longitud of the filter in n=0
b)A senoidal wave with amplitude =1 & frecuency 0.2 Fs.
c)A senoidal wave with amplitude = 1. & frecuency= 0.25 Fs.
d)A senoidal wave with amplitude = 1. & frecuency= 0.375 Fs.
Platform: |
Size: 2048 |
Author:actinio |
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Description: A simple low pass filter with file i/o programmed in C. The code calculates the output voltage given values of specific parameters such as resistor value, input voltage, etc. Platform: |
Size: 2048 |
Author:Hendrix |
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Description: 傅立叶变换在图像处理中的重要作用：
(A) 图像增强与图像去噪
绝大部分噪音都是图像的高频分量，通过低通滤波器来滤除高频噪声；边缘也是图像的高频分量，可以通过添加高频分量来增强原始图像的边缘；
(B) 图像分割与边缘检测
提取图像高频分量
(C) 图像特征提取
形状特征：傅里叶描述子
纹理特征：直接通过傅里叶系数来计算纹理特征
其他特征：将提取的特征值进行傅里叶变换来使特征具有平移、伸缩、旋转不变性
(D ) 图像压缩
可以直接通过傅里叶系数来压缩数据；常用的离散余弦变换是傅立叶变换的实变换；
-Fourier transform in the important role of image processing:
(A) image enhancement and image denoising
Most of all images of high frequency noise by low pass filter to filter out high frequency noise edge is the image of the high frequency components can be enhanced by adding high frequency components to the edge of the original image
(B) Image segmentation and edge detection
High frequency components extracted image
(C) image feature extraction
Shape features: Fourier descriptors
Texture: directly through the Fourier coefficients to calculate the texture features
Other features: The characteristic value extracted by Fourier transform to the characteristics of translation, scaling, rotation invariance
(D) image compression
Fourier coefficients can be directly compressed data commonly used discrete cosine transform is the Fourier transform of the real transformation
朗读显示对应的拉丁字符的拼音 Platform: |
Size: 147456 |
Author:夏伟 |
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Description: 这是一个对语音信号(0.3kHz~3.4kHz)进行低通滤波的C语言程序， 低通滤波的截止频率为800Hz，滤波器采用19点的有限冲击响应FIR滤波。 语音信号的采样频率为8kHz，每个语音样值按16位整型数存放在insp.dat文件中。-This c program is a low pass filter for radio signal 0.3kHz-3.4kHz.The stop frequence of this filter is 800hz.This digtal filter chooses 19 points FIR.the fs is 8kHz.every datas is memoryed in filed-insp.dat. Platform: |
Size: 1024 |
Author:余长江 |
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Description: 以中等纯度的精馏塔为研究对象，考虑到不等分子溢流的影响和非理想的汽液平衡，可以得到塔顶产品轻组分含量Y与回流量L之间的传递函数为：
其中由于现场环境干扰，输出带有测量噪声是（0，1）的正态分布序列，它的方差为ɑ=0.5。由于输出中带有很大的噪声信号，故将数字滤波技术中常见的低通滤波器由于偏差控制，滤掉其中的噪声信号，然后在对其进行PID计算，得到实际的控制量。在该方法在噪声较强的环境下，可以得到较好的控制效果。
控制要求：
1、 采用带低通滤波器的增量式PID将塔顶轻组分含量控制在0.99
2、 用ISTE法整定PID参数
3、 在控制过程中，到150周期加入幅度为-20 的阶跃干扰，在第300周期干扰消失。分析PID参数的抗干扰性。-Medium-purity distillation column, taking into account ranging from molecular overflow and non-ideal vapor-liquid equilibrium, the transfer function between the light component content of the top product Y and the back flow L can be obtained as:
Because the field of environmental interference, output with the measurement noise is a normal distribution (0,1) sequence, its variance ɑ = 0.5. As with a lot of noise in the output signal, it will be common in low-pass filter in the digital filtering techniques due to the bias control, filter out the noise signal, then its PID, the actual amount of control. In the strong noise environment, you can get better control effect.
Control requirements:
1, using the incremental PID with a low-pass filter to the top of the tower content of light components in the 0.99
2, the method of ISTE tuning PID parameters
3, in the control process, to 150 cycles join the range of-20 step disturbance, disappearance of interference in the first 300 c Platform: |
Size: 3072 |
Author:孙孙 |
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Description: MATLAB设计的低通滤波器中的自动生成的C语言头文件,是FIR数字滤波器。-C language header files automatically generated in the MATLAB design of low-pass filter is a FIR digital filter. Platform: |
Size: 1024 |
Author:小明 |
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Description: 信号处理中的低通滤波器 可适用于C语言环境 具有很好的移植性-Signal processing in the low pass filter can be applied in the C language environment has good portability Platform: |
Size: 29696 |
Author:申端明 |
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Description: 基于51单片机的C语言代码，指数加权平均算法滤波函数，也是一个一阶低通滤波器。文件中有比较详细的注释。-Based on the the 51 microcontroller C language code, exponentially weighted average algorithm filtering function is also a first-order low-pass filter. Detailed notes in the file. Platform: |
Size: 1024 |
Author:平雅畅 |
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Search - low pass filter in c