Spectral mapping of natural signals

Abstract

Here we present an algorithm to procedurally remap spectral contents of natural signals. The algorithm takes in two inputs: a signal whose spectral component needs to be remapped and a warping or remapping function. The algorithm generates one output, which is a remapped version of the original signal. The input signal is remapped into the output signal in two steps. In the analysis step, the algorithm performs a series of operations to modify the spectral content, i.e., compute the warped phase of the signal according to the given remapping function. In the synthesis step, the modified spectral content is combined with the envelope information of the input signal to reconstruct the warped or remapped output signal.