Real Cepstrum
Compute real cepstrum of input
Library
Transforms
dspxfrm3
Description
The Real Cepstrum block computes the real 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 always
processes unoriented vector inputs as a single channel, and returns the result as a
length-M column vector. The block does not accept complex-valued
inputs.
The output is a real Mo-by-N matrix, where you specify Mo in the FFT length parameter. Each output column contains the length-Mo real cepstrum of the corresponding input column.
y = real(ifft(log(abs(fft(u,Mo)))))
or, more compactly,
y = rceps(u,Mo)
When you select the Inherit FFT length from input port dimensions check box, the output frame size matches the input frame size (Mo=M).
The output port rate is the same as the input port rate.
Parameters
- Inherit FFT length from input port dimensions
When you select this check box, the output frame size matches the input frame size.
- FFT length
The number of frequency points at which to compute the FFT, which is also the output frame size, Mo. This parameter is visible only when you clear the Inherit FFT length from input port dimensions check box.
Supported Data Types
Double-precision floating point
Single-precision floating point
See Also
| Complex Cepstrum | DSP System Toolbox |
| DCT | DSP System Toolbox |
| FFT | DSP System Toolbox |
rceps | Signal Processing Toolbox |