A Hadamard transform (HT) analyzes a waveform into Walsh Function spectral components in the same manner that a Fast Fourier transform (FFT) analyzes a waveform into sinewave components. In contrast to the FFT, a real time HT network is easy to construct from analog components as the flow graph does not involve complex number arithmetic. The separated Walsh spectral components can be manipulated in a variety of ways before applying them to the inverse transform and time ordering the output for an audio signal.

Author: Hutchins, Jr., Bernard A.
Affiliation: ELECTRONOTES, ITHACA, NY
AES Convention: 51 (May 1975) Paper Number: 1041
Publication Date: May 1, 1975

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