Hottest Questions This Month

6

votes

3

answers

537

views

Compress a signal by storing signal diff instead of actual samples - is there such a thing?

modified Apr 15 at 3:35 Olli Niemitalo 8,688

5

votes

2

answers

351

views

Pole-zeros of a real-valued causal FIR system

fir poles-zeros

answered Mar 28 at 7:32 Kevin 11

7

votes

1

answer

195

views

Optimal amplitude of an $m$-bit sinusoid

snr quantization cosine thd

modified Apr 14 at 10:00 Olli Niemitalo 8,688

3

votes

3

answers

82

views

How Much Zero Padding Do We Need to Perform Filtering in the Fourier Domain?

image-processing fourier-transform computer-vision convolution zero-padding

modified Apr 4 at 23:00 Royi 7,301

2

votes

3

answers

96

views

Presenting an all-pass filter of a high order as a cascade of all-pass filters of the 1-st order

infinite-impulse-response allpass

modified Mar 27 at 19:49 CyberMen 613

2

votes

2

answers

177

views

Do Fourier frequencies actually exist in real life in form of “fundamental frequency”?

frequency fourier

modified yesterday Maurizio Carcassona 13

4

votes

2

answers

159

views

Removing step-function like noise from signal, knowing when the step functions occur

matlab discrete-signals signal-analysis

modified Apr 8 at 1:13 Luis Costa 70

3

votes

2

answers

95

views

STFT calculation with Gaussian Window

gaussian stft

modified Apr 13 at 2:12 robert bristow-johnson 11.4k

0

votes

3

answers

70

views

What is the precise definition of a nonlinear signal?

signal-analysis

answered Apr 18 at 13:11 Hilmar 10.6k

1

vote

2

answers

78

views

Question About Sampling White Noise

noise sampling homework

modified 8 hours ago Dilip Sarwate 13.5k

0

votes

4

answers

47

views

What's the advantage/disadvantage of oversampling followed by decimation, verses sampling at the correct rate to begin with?

sampling decimation

modified Apr 17 at 14:11 hotpaw2 26.2k

1

vote

2

answers

59

views

Why can convolution only be applied to compute the output of a linear filter?

image-processing filters computer-vision convolution linear-systems

modified Apr 10 at 13:50 Izzo 329

1

vote

2

answers

57

views

Ideal sampling using sinc funcion

fourier-transform sampling zoh

modified Mar 26 at 21:06 Dilip Sarwate 13.5k

5

votes

2

answers

73

views

How to determine if a filter is bandpass/stopband from its pole-zero diagram in z-domain

filters z-transform bandpass poles-zeros

answered Apr 9 at 17:49 Aditya 141

1

vote

1

answer

116

views

Autocorrelation of sinc function

autocorrelation fourier

modified Apr 3 at 2:21 Yu Hao 26

0

votes

2

answers

48

views

Delay in Savitzky-Golay filtering

filters python delay scipy array-signal-processing

answered Apr 8 at 13:25 Matt L. 51.6k

2

votes

1

answer

75

views

Hanning and Hamming Window

window-functions window

modified Apr 3 at 1:40 robert bristow-johnson 11.4k

1

vote

2

answers

73

views

Why isn't bilateral filtering shift-invariant?

image-processing filters computer-vision convolution

modified Apr 8 at 13:54 Olli Niemitalo 8,688

2

votes

1

answer

54

views

Phase of a real number

phase

modified Mar 29 at 22:06 MBaz 9,080

1

vote

1

answer

60

views

Maximum likelihood estimation complexity computation

digital-communications algorithms signal-detection complex

answered Apr 19 at 8:31 Marcus Müller 12.6k

2

votes

1

answer

56

views

Why Does 2D FFT of Gaussian Looks More Sharper than Gaussian Itself?

image-processing fft fourier-transform convolution gaussian

modified Mar 25 at 8:29 Royi 7,301

2

votes

3

answers

56

views

“Dirac Comb” vs “Ones Comb”

fourier-transform z-transform

answered Mar 30 at 13:24 Community♦ 1

0

votes

2

answers

52

views

What is the interpretation of Fourier Transform containing only imaginary part?

fourier-transform dft fourier dtft

modified Apr 20 at 18:37 Matt L. 51.6k

0

votes

1

answer

63

views

Term for integral multiples of fundamental period?

signal-analysis frequency frequency-response time-frequency fundamental-frequency

modified Apr 9 at 16:22 Dilip Sarwate 13.5k

2

votes

1

answer

79

views

Purpose of multiplying fft output by Hann window?

fft window-functions frequency-domain

modified Apr 4 at 9:50 RTbecard 120

2

votes

2

answers

78

views

Doppler Shifting A Chirp Signal

discrete-signals doppler linear-chirp chirp

modified Apr 1 at 6:29 robert bristow-johnson 11.4k

0

votes

0

answers

88

views

“Improved” MZT/IIM type One pole LPF

filters lowpass-filter approximation

modified Mar 28 at 16:35 Juha P 155

2

votes

1

answer

66

views

Nyquist Plot for transfer functions with poles at the origin

frequency-spectrum frequency-response nyquist poles-zeros stability

modified Apr 7 at 18:40 Matt L. 51.6k

3

votes

1

answer

65

views

Understading sampling theorem and aliasing

sampling lowpass-filter aliasing

answered Mar 27 at 13:45 Dan Szabo 281

2

votes

1

answer

37

views

Electret microphone RC filter design contradiction among information sources

fft filter-design

modified Apr 1 at 18:09 PAK-9 732

0

votes

1

answer

45

views

low pass filter

filters

modified Mar 31 at 16:35 Matt L. 51.6k

1

vote

1

answer

57

views

Split audio file into audio phrases

speech-processing speech-recognition audio-processing

answered Mar 31 at 19:34 Nikolay Shmyrev 943

0

votes

2

answers

55

views

Convolution of Two Impulse Signals

filters discrete-signals convolution fir

modified Apr 10 at 16:22 Dilip Sarwate 13.5k

2

votes

2

answers

42

views

Contradiction while using the convolution sum for a non-LTI system

discrete-signals signal-analysis convolution linear-systems

modified Apr 13 at 16:57 Matt L. 51.6k

1

vote

1

answer

66

views

FFT Heart Rate Monitor on Arduino

fft

answered Mar 30 at 12:05 MaximGi 579

2

votes

1

answer

39

views

Understanding sampling rate conversion

downsampling multirate

answered Mar 27 at 21:09 Hilmar 10.6k

1

vote

2

answers

49

views

Beat detection in Matlab or Python

matlab python

answered Mar 27 at 14:37 CyberMen 613

1

vote

1

answer

49

views

Calculation of line of sight system gain

signal-analysis

answered yesterday MBaz 9,080

1

vote

1

answer

47

views

Cost function for LTI system identification

linear-systems transfer-function system-identification autoregressive-model

modified yesterday Jonas Schwarz 264

1

vote

1

answer

60

views

What do we mean by spectrum?

image-processing computer-vision terminology

modified Mar 27 at 15:04 nbro 177

1

vote

1

answer

60

views

Change durration/tempo of a .Wav file without introducing pops or pitch shift?

audio filter-design audio-processing

modified Apr 11 at 20:15 user2169557 106

1

vote

2

answers

36

views

Physical meaning of average values of random signals

stochastic

answered Mar 31 at 1:34 mark leeds 572

0

votes

1

answer

46

views

Difference between two sine generators

signal-analysis frequency-spectrum signal-synthesis

modified 14 hours ago Olli Niemitalo 8,688

0

votes

3

answers

59

views

Significance of signal energy in audio?

signal-analysis audio

answered Apr 11 at 20:19 Hilmar 10.6k

1

vote

2

answers

45

views

Why do mobile phone calls produce a vibration when they are near a speaker?

soft-question

answered Apr 12 at 16:39 Dr. Dan 119

0

votes

1

answer

35

views

DTFT frequency range

fft discrete-signals fourier-transform dft

modified Apr 3 at 19:56 robert bristow-johnson 11.4k

1

vote

2

answers

35

views

What exactly is captured in a Sample of the Nyquist-Theorem variety?

discrete-signals sampling nyquist

answered Apr 5 at 1:42 robert bristow-johnson 11.4k

1

vote

1

answer

27

views

How do bode plots work with unstable systems work?

signal-analysis frequency-spectrum frequency-response laplace-transform bode

modified Apr 12 at 9:45 Matt L. 51.6k

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