A discrete cosine transform (DCT) is defined and an algorithm to compute it using the fast Fourier transform is developed. It is shown that the discrete cosine transform can be used in the area ofâ€¦ (More)

A simple method for generating a class of time-sequency-amplitude plots called Walsh spectrograms is presented. A Fortran computer program which enables one to generate such spectrograms readily isâ€¦ (More)