Documentation |
Compute complex cepstrum of input
The Complex Cepstrum block computes the complex cepstrum of each column in the real-valued M-by-N input matrix, u. The block treats each column of the input as an independent channel containing M consecutive samples. The block does not accept complex-valued inputs.
The input is altered by the application of a linear phase term so that there is no phase discontinuity at ±π radians. That is, each input channel is independently zero padded and circularly shifted to have zero phase at π radians.
The output is a real M_{o}-by-N matrix, where M_{o} is specified by the FFT length parameter. Each output column contains the length-M_{o} complex cepstrum of the corresponding input column.
y = cceps(u,Mo) % Equivalent MATLAB code
When you select the Inherit FFT length from input port dimensions check box, the output frame size matches the input frame size (M_{o}=M). In this case, the block processes sample-based length-M row vector inputs as a single channel (that is, as an M-by-1 column vector), and returns the result as a length-M column vector. The block always processes unoriented vector inputs as a single channel, and returns the result as a length-M column vector.
The output port rate is the same as the input port rate.
When you select this check box, the output frame size matches the input frame size.
The number of frequency points at which to compute the FFT, which is also the output frame size, M_{o}. This parameter is visible only when you clear the Inherit FFT length from input port dimensions check box.
DCT | DSP System Toolbox |
FFT | DSP System Toolbox |
Real Cepstrum | DSP System Toolbox |
cceps | Signal Processing Toolbox |