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• ECE438 Lab Spring 2017
  *Week 9: [[Media:lab7aECE438F15.pdf| Lab 7a - Digital Filter Design]] *Week 11: [[Media:lab7bECE438F15.pdf| Lab 7b - Digital Filter Design]]
  2 KB (325 words) - 18:20, 30 March 2017
• HW4ECE438S17
  ...he patient is being monitored. You are going to design a high-pass digital filter to eliminate the 60 Hz interference and everything at frequencies below 60 a) Sketch the CTFT of the (analog) high-pass filter that is needed in this case
  4 KB (658 words) - 14:50, 1 February 2017
• Audio filtering of the Trayvon Martin 911 call
  ...ne the frequency ranges of both the signal and the noise so an appropriate filter could be applied. Spectrograms for each section were created with the MATLA ...d a clearer result. This filter was implemented using MATLAB's butterworth filter command.
  6 KB (984 words) - 21:39, 23 April 2017
• An Implementation of Sobel Edge Detection
  ...f differently (or symmetrically) weighted indexes. This will represent the filter that we will be implementing for an edge detection. ...user wanted to exaggerate the edge, then the user would need to change the filter values of -2 and 2 to higher magnitude. Perhaps -5 and 5. This would make t
  7 KB (1,184 words) - 20:31, 23 April 2017
• BRITA Filter
  ===BRITA Filter: Audio Filtration and FFT Visualizer=== ...ss, HPF, LPF, etc) with different Q and cutoff values to achieve the exact filter response desired. Very simple filters, such as the HPF and LPF discussed in
  6 KB (1,048 words) - 16:58, 24 April 2017
• Mock up Final Exam
  a. Yes! This can be accomplished by passing the signal through a low-pass filter with a gain of 5 and a cutoff at <math> \frac {2 \pi 2000} {9000} </math>
  7 KB (1,194 words) - 19:21, 24 April 2017
• ECE438 Lab Fall 2017
  *Week 9: [[Media:lab7aECE438F15.pdf| Lab 7a - Digital Filter Design]] *Week 10: [[Media:lab7bECE438F15.pdf| Lab 7b - Digital Filter Design]]
  3 KB (418 words) - 21:57, 7 January 2018
• 3D Visualization of Z-Transform
  Take the high pass filter y[n] = 1/2*(x[n]-x[n-1]) as an example. Figure2: Fourier Transform of a high pass filter
  2 KB (310 words) - 21:40, 30 November 2017
• 3-D Visualization of Z-Transform
  Take the high pass filter y[n] = 1/2*(x[n]-x[n-1]) as an example. Figure2: Fourier Transform of a high pass filter
  2 KB (310 words) - 21:44, 30 November 2017
• Characteristic Analysis of Simply Distortion Pedal
  ...ference point of 4.5V with 0V, and I assumed that the frequency responses' filter characteristics should remain the same. ...n offers a Low-Pass Filter while the rightmost position offers a High-Pass Filter, which fits the User's Manual description of "Max Bass" and "Max Treble."
  5 KB (752 words) - 16:44, 2 December 2017
• Characteristic Analysis of a Simply Distortion Pedal
  ...ference point of 4.5V with 0V, and I assumed that the frequency responses' filter characteristics should remain the same. ...n offers a Low-Pass Filter while the rightmost position offers a High-Pass Filter, which fits the User's Manual description of "Max Bass" and "Max Treble."
  3 KB (499 words) - 03:53, 2 December 2017
• Summary of Facts about ROC/ROAC of a Z-Transform
  | FIR Filter || ROC of transfer function is the whole complex plane except z=0 and/or z=
  967 B (143 words) - 13:22, 3 December 2017
• Digital Filters: An Overview on Design Points and Considerations
  ...and design in addition to how concepts learned in ECE 438 apply to actual filter design. ...The step response is the integrated impulse response and will show how the filter will affect the signal in the time-domain. On the other hand, the frequency
  6 KB (897 words) - 16:44, 7 December 2017
• ECE438 Lab Spring 2018
  *Week 6: [[Media:lab7aECE438F15.pdf| Digital Filter Design 1]]
  3 KB (375 words) - 13:15, 25 January 2018
• Sampling theorem review
  ...rain does not overlap then the signal can still be recovered by applying a filter.
  2 KB (332 words) - 03:22, 23 November 2018
• Use of Fourier Transforms in MP3 Audio Compression
  ...des the audio signal into smaller pieces, these are called frames. An MDCT filter is then performed on the output. ...1024-point FFT, and then the psychoacoustic model is applied. Another MDCT filter is performed on the output.
  5 KB (752 words) - 17:40, 2 December 2018
• Modulation and Demodulation
  ...mind that when there is a specific frequency channel specified, a Bandpass filter must be added at the end of the pulse train example in order to get the pro ...mind that when there is a specific frequency channel specified, a Bandpass filter must be added in before multiplying by the carrier.
  2 KB (405 words) - 23:42, 2 December 2018
• Use of FFT in MATLAB
  ...find out which frequency is needed, you can use the frequency obtained to filter out other frequencies that creates noise.
  3 KB (555 words) - 22:02, 2 December 2018
• QE2010 CS-2 ECE538
  ...ution of the causal sinewave of length N in Equation (1) with a causal FIR filter of length L, where L < N.<br/>
  8 KB (1,474 words) - 16:37, 24 February 2019
• QE2011 CS-2 ECE538
  ...ters, <math>f_0[n]</math> and <math>f_1[n]</math>,form a Quadrature Mirror Filter (QMF). Specially, <br> The DTFT of the halfband filter <math>h_0[n]</math> above may be expressed as follows:<br>
  4 KB (738 words) - 15:34, 19 February 2019
• QE 2017 CS-5
  e) Describe what ths filter does and how the output changes as <math>\lambda</math> increases.<br>
  2 KB (338 words) - 16:48, 19 February 2019
• 2017CS-5-1
  This is a sharpen filter. The image will become more sharpen as <math>\lambda</math> increases.
  2 KB (282 words) - 11:58, 25 February 2019
• Filtering text on a chalkboard
  ...come hardly visible. The goal of this mini-project was to apply a low pass filter learnt in class and observe its effectiveness in removing the excess chalk ...r (and popular) filters to implement at this scale. Secondly, the low-pass filter is versatile enough to extend applications to any writing on a background,
  7 KB (1,006 words) - 19:22, 7 April 2019
• Filtering Sound with Adobe Audition
  ...spike), we can try to apply something we already know about - a band-pass filter! To do this, we are going to go to '''Effects -> Filter and EQ -> FFT Filter...'''. This will display a simpler Fourier Transform of our signal at a spe
  6 KB (1,077 words) - 20:29, 7 April 2019
• AM SSB and DSM Matlab Exercise
  In both cases, we must first low pass filter each audio file
  1 KB (185 words) - 17:30, 25 April 2019
• 2019 Fall ECE 438 Boutin
  | [[ece438f19achakrabortybonus|Finding the Optimal Filter Size for Median Filtering]] | [[ece438f19mvermabonus|Image Convolution with Different Filter Applications]]
  4 KB (467 words) - 02:18, 10 December 2019
• ECE438 Lab Fall 2019
  *Week 9: [[Media:lab7aECE438F15.pdf| Lab 7a - Digital Filter Design]] - [[Media:lab7agradingrubric.pdf|Lab7a cover sheet with grading ru *Week 10: [[Media:lab7bECE438F19new.pdf| Lab 7b - Digital Filter Design]] - [[Media:lab7bgradingrubric.pdf|Lab7b cover sheet with grading ru
  4 KB (572 words) - 11:16, 3 December 2019
• Lecture Schedule ECE438Fall2019 Boutin
  *** [[Media:lab7aECE438F15.pdf| Lab 7a - First Lab on Digital Filter Design]] *Week 10-(11): Filtering (Systems defined by Difference equations, Filter Design, DFT view of Filtering)
  10 KB (1,356 words) - 18:52, 20 August 2019
• Ece438f19bhelfrechtbonus
  ...cy content from the original signal by first passing it through a low pass filter to ensure the final downsampled signal satisfies the Nyquist criterion. See <math>x_1[n]</math> → Low pass filter with cutoff <math>\frac{𝜋}{D}</math> and gain 1 → Downsample by factor
  16 KB (2,611 words) - 14:11, 12 November 2019
• ECE438f19svezhavebonus
  The Karplus-Strong algorithm uses a noise burst as an initial condition, a filter of the designer's choice, and a positive feedback loop to produce a signal ...s at the bottom of the article show what happens to the output when an IIR filter with poles near an A string's harmonic frequencies is chosen.
  3 KB (546 words) - 23:43, 1 December 2019
• Ece438f19trujillabonus
  ...MATLAB to remove the frequencies above 11 kHz. Next, we design a high-pass filter to remove the frequencies below 7.5 kHz. See the MATLAB code and listen to [[File:batnoisesmatlab.PNG|unframed|MATLAB code used to filter recording of nighttime noises to hear bat noises more clearly]]
  2 KB (280 words) - 23:27, 1 December 2019

• File:Batnoisesmatlab.PNG MATLAB code used to filter nighttime noises to hear bat noises more clearly (621 × 293 (10 KB)) - 20:32, 1 December 2019

• Ece438f19achakrabortybonus
  <big>'''Finding the Optimal Filter Size for Median Filtering'''</big> ...contained salt and pepper noise. This page will demonstrate how the median filter size affects the filtered image in terms of-<br />
  6 KB (1,000 words) - 23:15, 30 November 2019
• Ece438f19mvermabonus
  <big>'''Image Convolution with Different Filter Applications'''</big> ...ically then applied to the image matrix. We add the product of the flipped filter matrix together to get the value of that pixel of the filtered image. This
  4 KB (624 words) - 09:11, 6 December 2019
• Creating your own vowel resonators using tubing
  ...We can therefore model the vocal tract as a series of uniform tubes that filter the signal.
  5 KB (849 words) - 02:10, 10 December 2019
• Walther MA271 Fall2020 topic20
  ...ddition, the transform can detect unwanted periodic patterns in images and filter them out.<br /><br />
  12 KB (2,051 words) - 14:20, 5 December 2020
• Laplace Operator Page 7 2020
  ...g at a decreasing rate (or vice-versa). This process is called the Laplace filter in image processing. The original image, before application of the Laplace filter.
  2 KB (392 words) - 23:11, 6 December 2020
• Laplace Operator Page 8 2020
  ...//docs.opencv.org/3.4/d5/db5/tutorial_laplace_operator.html OpenCV Laplace Filter Image Processing]
  2 KB (242 words) - 00:36, 7 December 2020
• Features of Nyquist's Theorem
  ...ented with a variety of anti-aliasing tools, such as low-pass filters that filter out high frequencies.
  3 KB (444 words) - 23:32, 6 December 2020