NMSIS-DSP  Version 1.2.0
NMSIS DSP Software Library
Transform Functions

Modules

 Complex FFT Functions
 
 DCT Type IV Functions
 Representation of signals by minimum number of values is important for storage and transmission. The possibility of large discontinuity between the beginning and end of a period of a signal in DFT can be avoided by extending the signal so that it is even-symmetric. Discrete Cosine Transform (DCT) is constructed such that its energy is heavily concentrated in the lower part of the spectrum and is very widely used in signal and image coding applications. The family of DCTs (DCT type- 1,2,3,4) is the outcome of different combinations of homogeneous boundary conditions. DCT has an excellent energy-packing capability, hence has many applications and in data compression in particular.
 
 MFCC
 MFCC Transform.
 
 Real FFT Functions
 

Detailed Description