## Functions for use with frame based processing

sig2coef | Produce a single set of coefficents from a waveform.
sigpr_base | Produce multiple coefficients from a waveform by repeated calls to sig2coef.
power | Calculate the power for each frame of the waveform.
energy | Calculate the rms energy for each frame of the waveform.
fbank | Mel scale filter bank analysis.
melcep | Mel scale cepstral analysis via filter bank analysis.

> In the following functions, the input is a EST_Wave waveform, and the output is a (usually multi-channel) EST_Track. The track must be set up appropriately before hand. This means the track must be resized accordingly with the correct numbers of frame and channels.

> The positions of the frames are found by examination of the time array in the EST_Track, which must be filled prior to the function call. The usual requirement is for fixed frame analysis, where each analysis frame is, say, 10ms after the previous one.

> A common alternative is to perform pitch-synchronous analysis where the time shift is related to the local pitch period.

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This page is part of the Edinburgh Speech Tools Library documentation
Copyright University of Edinburgh 1997
Contact: speech_tools@cstr.ed.ac.uk