Digital Signal Processing

01

Fourier Transform

Time to frequency domain conversion with animated spectrum analysis.

02

FFT Algorithm

Butterfly operations and bit-reversal in the Fast Fourier Transform.

03

Windowing Functions

Hann, Hamming, Blackman windows for spectral leakage control.

04

Aliasing Demo

Nyquist sampling theorem and frequency folding visualization.

05

Convolution

Flip-shift-multiply-sum operation with step-by-step animation.

06

FIR Filter Design

Windowed sinc method with impulse and frequency response.

07

IIR Filter Poles/Zeros

Interactive pole-zero placement with stability analysis.

08

Butterworth Filter

Maximally flat magnitude response design.

09

Chebyshev Filter

Equiripple response with Type I and Type II comparison.

10

Elliptic Filter

Sharpest cutoff comparison: Butterworth vs Chebyshev vs Elliptic.

11

Notch Filter

50/60 Hz power line interference removal.

12

Comb Filter

Periodic nulls and peaks - feedforward vs feedback.

13

All-Pass Filter

Phase modification with unity magnitude response.

14

Filter Cascade

Series combination of multiple filter stages.

15

Wavelet Transform

Multi-resolution analysis with Haar wavelets.

16

Spectrogram Display

Time-frequency representation with adjustable parameters.

17

Autocorrelation

Signal self-similarity and pitch detection.

18

Cross-Correlation

Pattern matching and signal detection in noise.

19

Hilbert Transform

Analytic signal for envelope and instantaneous frequency.

20

Phase Vocoder

Time stretching without pitch change.