octave-signal 1.4.1-3 (s390x binary) in ubuntu focal

 This package provides signal processing tools including filtering,
 windowing and display functions in octave.
 .
 Blackman-Harris, Blackman-Nuttall and Bohman are among the windowing functions
 and filters include Chebyshev type filters and butterworth filters.
 .
 Additionally, some wavelet functions are included.
 .
 This Octave add-on package is part of the Octave-Forge project.