This is a course project for Digital Signal Processing of E.E., Tsinghua University.

See the report.

This project contains:

• A DSP library written in C++:
  • FFT
  • Utilities including:
    • abs_vector for std::vector<std::complex<double>>
    • convert_to_complex from two vectors<double> of real and imag part
    • find_peaks
• Goertzel Algorithm written in MATLAB

This project solves 3 problems:

1. Detect single telephone key using FFT
2. Detect single telephone key using Goertzel Algorithm
3. Detect continous telephone keys using FFT and Goertzel Algorithm

adamstark/AudioFile : Used for reading wav files.

user lastchance on cplusplus.com : peak finding algorithm.