Domain transform is a group of mathematical calculations that transform a set of signal data from one domain into another. E.g., from time-domain, where signal changes over time, to frequency-domain, where signal lies within each given frequency band over a range of frequencies. In some cases, there are no latent information that can be yield by analyzing a signal in time-domain. However, information that hides in the signal can be easily found out by analyzing it in frequency-domain.
This document introduces 2 kinds of domain transforms: Fourier transform (FT, including Fast Fourier transform, FFT), and discrete cosine transform (DCT). As well as how to do these transforms using MKL API functions.
Contents in this article:
1.. Preface
2.. Introduction of domain transform
3.. FFT/DFT with MKL
4.. DCT with MKL
5.. Summary