Description: 电话计费器程序/*信号定义：
clk： 时钟信号，本例中其频率值为1Hz；
decide： 电话局反馈回来的信号，代表话务种类，“01”表示市话，“10”表示
长话，“11”表示特话；
dispmoney： 用来显示卡内余额，其单位为角，这里假定能显示的最大数额为50 元
（500 角）；
disptime： 显示本次通话的时长；
write,read： 当write 信号下降沿到来时写卡，当话卡插入，read 信号变高时读卡；
warn： 余额过少时的告警信号。本例中，当打市话时，余额少于3 角，打长
话时，余额少于6 角，即会产生告警信号；
cut： 当告警时间过长时自动切断通话信号。 */-telephone billing for procedures / * signal definition : clk : clock signal, which in this case, their frequency of 1Hz; decide : Telephone Bureau feedback signal, then the Treasury representative types, "01" Urban said, "10" The point said, "11" expressed special words; dispmoney : to show the card balance, the unit of angle, Here are supposed to show the maximum amount of 50 billion yuan (500 angle); disptime : The calls show the length; write, read : When the write signal arrival of the down time to write cards, When the card insert, read signal change high Reader; warn : Fees balance of the alarm signal. In this example, when fighting City words, the balance is less than 30 cents, playing The point, the balance is less than 60 cents, would produce warning Platform: |
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Author:slam |
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Description: 电话计费器程序/*信号定义：
clk： 时钟信号，本例中其频率值为1Hz；
decide： 电话局反馈回来的信号，代表话务种类，“01”表示市话，“10”表示
长话，“11”表示特话；
dispmoney： 用来显示卡内余额，其单位为角，这里假定能显示的最大数额为50 元
（500 角）；
disptime： 显示本次通话的时长；
write,read： 当write 信号下降沿到来时写卡，当话卡插入，read 信号变高时读卡；
warn： 余额过少时的告警信号。本例中，当打市话时，余额少于3 角，打长
话时，余额少于6 角，即会产生告警信号；
cut： 当告警时间过长时自动切断通话信号。 */-telephone billing for procedures/* signal definition : clk : clock signal, which in this case, their frequency of 1Hz; decide : Telephone Bureau feedback signal, then the Treasury representative types, "01" Urban said, "10" The point said, "11" expressed special words; dispmoney : to show the card balance, the unit of angle, Here are supposed to show the maximum amount of 50 billion yuan (500 angle); disptime : The calls show the length; write, read : When the write signal arrival of the down time to write cards, When the card insert, read signal change high Reader; warn : Fees balance of the alarm signal. In this example, when fighting City words, the balance is less than 30 cents, playing The point, the balance is less than 60 cents, would produce warning Platform: |
Size: 1024 |
Author:slam |
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Description: matlab下实现降噪，功率谱计算。％程序中设定采样点数为256个，采样频率为10000hz，
％输入信号为随机噪声和两个正弦的合成信号
％设定的滤波器的截止频率为3500hz
％通过挈比雪肤滤波器，运行程序，比较滤波前后的频域波形
％滤波去除了高频信号-matlab achieve noise reduction, power spectrum calculation. Sampling procedure set for 256 points, the sampling frequency of 10000hz, input signal for the random noise and the two sinusoidal signals synthetic filter set a cut-off frequency 3500hz manner than through the filter雪肤, run procedures, compared before and after filtering in frequency domain waveforms filtering in addition to high-frequency signals Platform: |
Size: 1024 |
Author:范范 |
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Description: 用于频域滤波的m函数，接受输入一幅图像和一个滤波函数，输出经滤波和剪切后的图像。还有一个高通滤波函数。-For frequency domain filtering m function, to accept the importation of an image and a filter function, the output cut by the filtering and image. There is also a high-pass filtering function. Platform: |
Size: 1024 |
Author:乔连芝 |
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Description: 问题是高切滤波或低通滤波，如果采用硬件实现，速度最快，但是现在计算机速度这么快，硬件实现起来相对麻烦，成本高，且灵活性性差，
软件实现相对方便多了，具体体的操作步骤如下（频率域）
先对数据作正FFT,再对变换后的频域数据乘以滤波因子，滤波因子的选择有理想高通、巴特沃斯高通、指数高通、梯形高通，一般选择梯形高通滤波因子，具体原因你可从数字信号处理的书上找到，，接下来将数据再作逆FFT就是了，还有就是在空间域作滤波，这里有一个带同滤波的程序的程序，你可参考一下，（将低切参数设为零就是你的高切滤波）-The problem is the high cut filter or low pass filter, if the use of hardware, the fastest, but now the computer speed so fast, hardware problems are relatively high cost and poor flexibility,
Software is relatively easy to achieve more concrete steps are as follows body (frequency domain)
Is the first of the data for FFT, then the transformed frequency domain data multiplied by the filter factor, choose the ideal filter factor of the high-pass, Butterworth high-pass, index of high-pass, high pass ladder, generally choose high-pass ladder filter factor the specific reason you can book on digital signal processing found, then the data further inverse FFT is it, there is in the spatial domain for filtering, there is a filtering process with the same program, you can refer to , (the low-cut parameters set to zero is your high-cut filter) Platform: |
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Author:夏燕苹 |
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Description: Implementation of a speech codec based on coding of speech at 8 kbit/s
using conjugate-structure algebraic-code-excited linear-prediction (CS-ACELP)
- We took .wav files that is sampled at 8000 Hz using 16-bit linear PCM. The encoding process is done every 10ms frame or 80 samples. For the preprocessing stage, the samples are high passed with cut-off frequency of 140 Hz and scaled down by 2. A total of 240 samples are buffer for windowing and autocorrelation computation. The autocorrelation coefficients are used to calculate the LP filter coefficients using the Levinson-Durbin algorithm. The LP filter coefficients are converted to Line Spectral Pair (LSP) coefficients. LSP coefficients are converted back to the LP filter coefficients, which is just the reverse process of the conversion from LP to LSP. This module is exactly what the decoder will need in order to convert the LSP coefficients to LP coefficients. We decided not to implement the LSF quantization module because we did not have the codebook information when we designed our system.
The open-loop pitch delay is calculated first for each frame. Then the closed-loop pitch Platform: |
Size: 40960 |
Author:coco |
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Description: 用窗函数法设计FIR带通滤波器。指标：低端通带截止频率wlp=0.35π 低端阻带截止频率wls=0.2π。高端通带截止频率whp=0.65π 高端阻带截止频率whs=0.8π。-Design of FIR with window function bandpass filter target: low-pass with cutoff frequency wlp = 0.35π low stopband cutoff frequency wls = 0.2π passband cutoff frequency of high-end whp = 0.65π high stopband cut-off frequency whs = 0.8π Platform: |
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Author:beifang |
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Description: 1． 利用傅立叶级数展开的方法，自由生成所需的x(t)；
2． 通过选择不同的采样间隔T（分别选T>或<1/2fc），从x(t)获得相应的x(n)（作出x(n)图形）；
3． 对获得的不同x(n)分别作傅立叶变换，分析其频率响应特性（给出幅频与相频特性曲线）；
4． 利用巴特沃思、切比雪夫或椭圆滤波器设计数字滤波器（滤波特性自定），要求通过改变滤波器参数或特性（低通、高通、带通或带阻）设计至少两种数字滤波器，分析所设计滤波器（画出频率特性曲线），并对上述给出的不同x(n)分别进行滤波（画出滤波结果），然后加以讨论；
5． 利用窗函数设计法或频率采样法设计数字滤波器（滤波特性自定），要求通过改变滤波器参数或特性（低通、高通、带通或带阻等）设计至少两种数字滤波器，分析所设计滤波器（画出频率特性曲线），并对上述给出的不同x(n)分别进行滤波（画出滤波结果），然后加以讨论。
-A.Fourier series expansion method, the freedom to generate the required x (t)
Two. Respectively election by selecting different sampling interval T (T> or <1/2fc), the corresponding x (n) from x (t) (make x (n) graphic)
3. The different x (n) the Fourier transform analysis of the frequency response characteristics (given amplitude frequency and phase frequency response curve)
4. Butterworth, cut than the Chebyshev or elliptic filter design digital filter (the filter characteristics from the set), requirements designed to change the filter parameters or characteristics (low pass, high pass, band pass or band-stop) at least two digital filtering to analyze the filter design (draw-frequency characteristic curve), and were given above x (n) filter (Paint filter results), and then to be discussed
5 Window function design method or frequency of sampling design of digital filters (filter characteristics from the set), at least two digital filter design for change the filter para Platform: |
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Author:youngshine |
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Description: 利用截止频率不同的频域高通滤波器对图像进行处理，并比较不同截止频率对滤波效果的影响，说明产生差异的原因。-Cut-off frequency of the different frequency-domain high-pass filter to the image processing, and compare the different cut-off frequency of the filtering effect, explain the causes of differences. Platform: |
Size: 38912 |
Author:jinly |
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Description: A low-pass filter is a filter that passes low-frequency signals but attenuates (reduces the amplitude of) signals with frequencies higher than the cutoff frequency. The actual amount of attenuation for each frequency varies from filter to filter. It is sometimes called a high-cut filter, or treble cut filter when used in audio applications. A low-pass filter is the opposite of a high-pass filter. A band-pass filter is a combination of a low-pass and a high-pass. Platform: |
Size: 1024 |
Author:nicolas |
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Description: 下载并读入被噪音污染的Noisychurch图像数据，用Matlab 编程采用下述方法分
别实现该图像的增强操作：
1） 用空域法实现图像的增强，分别采用如下模板操作：2x2 和3x3 的幅值为1
的模板，比较去噪和模糊的折中效果；采用3x3 的中值滤波器进行去噪操作；
采用Laplacian 模板[0 -1 0 -1 5 -1 0 -1 0]进行锐化操作。
2） 用频域法实现该图像的低通和高通滤波，选择合适的截止频率。
3） 用小波分析法实现该图像的低通和高通滤波，注意离散小波分析的分解和重
构算法的运用。
4） 比较上述三种处理方法的结果。 -Download and read by the noise pollution Noisychurch image data using Matlab programming using the following method to achieve the image enhancement operation: 1) image enhancement airspace law, respectively, using the following template operation: 2x2 and 3x3 amplitude a template comparison denoising and fuzzy compromise denoising operation with a 3x3 median filter using Laplacian template [0-10 -15-1 0-10] for sharpening operation. . 2) low-pass and high-pass filtering of the image using the frequency-domain method, select the appropriate cut-off frequency. 3) low-pass and high-pass filtering of the image using wavelet analysis, pay attention to the use of discrete wavelet analysis decomposition and reconstruction algorithm. 4) comparing the results of the three processing method. Platform: |
Size: 2606080 |
Author:Haibin Zhang |
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Description: 有限冲击响应模拟滤波器，可自行设计滤波器类型，拓扑结构、高、低截止频率
增益、窗函数等等，滤波效果好。-Limited impact response analog filter, can to design filter types, topology structure, high and low cut-off frequency Gain, window function and so on, filtering effect is good.
Platform: |
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Author:周志鹏 |
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Description: 对原图分别在频域内使用理想低通滤波器（选择任意截止频率）和理想高通滤波器（选择任意截止频率）和理想高通滤波器，再对其使用快速傅里叶变换，并输出修复后的图像的频率谱图。最后将高通滤波与低通滤波后的相加，输出，并与原图进行比较。-Respectively of the original image in the frequency domain using the ideal low-pass filter (choose an arbitrary cut-off frequency) and the ideal high-pass filter (choose an arbitrary cut-off frequency) and the ideal high-pass filter, and its use of fast Fourier transform, and output restored the image of the frequency spectrum. Finally, after the high pass filtering and low-pass filtering the summed output, and compares with the original image. Platform: |
Size: 1024 |
Author:woody |
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Description: 采用双线性变换法设计一巴特沃斯高通滤波器，其通带截止频率（-3dB点处） =3KHz，阻带上限截止频率 =2KHz，能带衰减不大于3dB,阻带衰减不小于14dB，采样频率 =10KHz。-Bilinear transform design a Butterworth high-pass filter, the passband cut-off frequency (-3dB point) = 3KHz stopband upper cut-off frequency = 2KHz band attenuation is not greater than 3 dB stop-band attenuation of less than 14dB sampling frequency = 10kHz. Platform: |
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Author:曹芬 |
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Description: 一段FPGA的分频代码,可以完成FPGA中高频分成低频的功能-a section of code about division of frequency which can cut high frequency to low frequency Platform: |
Size: 1024 |
Author:王亚威 |
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Description: 2nd order high pass filter with cut off frequency at 400 Hz. Designed with cheby2 function in MATLAB.
-2nd order high pass filter with cut off frequency at 400 Hz. Designed with cheby2 function in MATLAB.
Platform: |
Size: 1024 |
Author:caowonsue |
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Description: 2nd order high pass filter with cut off frequency at 31 Hz. Designed with cheby2 function in MATLAB.
-2nd order high pass filter with cut off frequency at 31 Hz. Designed with cheby2 function in MATLAB.
Platform: |
Size: 1024 |
Author:hoziutie |
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Description: 公共端：共阳
脉冲：最大2MHz 对于57电机来说 最大频率为1K
方向：高低信号
脱机：输入低电平时电机电源被切断。也就是说的使能，高有效
步距角：1.8度-Common: common anode pulse: maximum 2MHz to 57 motors for maximum frequency of 1K direction: high and low signal off: When entering low motor power is cut off. That' s enabled, high effective step angle: 1.8 degrees Platform: |
Size: 195584 |
Author:sowar |
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Search - high cut frequency