Digital Signal Processing Class

• Implementing matlab code for various type of filters or functions.

Development Environment

• IDE : Matlab
• OS : Windows10
• Language : Matlab

Overview

1. Linearlity Test
2. Sampling
3. Fast Fourier Transform (FFT)
4. Digital Filter
5. Filter Design - Noise Reduction, Speech Noise Reduction, Make Echo

1. Linearlity Test

• As I plot the function, I can classify whether linear or not

2. Sampling

• Because Our Digital system is discrete, I convert Infinite impulse signal(IIR) to Finite Impulse signal(FIR).

3. Fast Fourier Transform (FFT)

• I learned from the graph that the results of dft and fft are the same, and that in large projects, fft algorithms should be used for the efficiency of computation.

4. Digital Filter

• I implemented digital filter on two kinds of functions.

5. Filter Design

Noise Reduction using Kaiser Window & Hamming filter

Noise Reduction using Lowpass filter & Highpass filter

• I implemented various kinds of filter and window function to reduce noise at simple sound and speech.
• I also implemented echo sound using IIR & FIR on "Legends never die (by Alan walker)" Music.