/Users/richardeakin/projects/libsms/trunk/src/spectralApprox.c File Reference

line segment approximation of a magnitude spectrum More...

#include "sms.h"

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Functions
int	sms_spectralApprox (sfloat *pFSpec1, int sizeSpec1, int sizeSpec1Used, sfloat *pFSpec2, int sizeSpec2, int nCoefficients)
	approximate a magnitude spectrum First downsampling using local maxima and then upsampling using linear interpolation. The output spectrum doesn't have to be the same size as the input one.

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Detailed Description

line segment approximation of a magnitude spectrum

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Function Documentation

int sms_spectralApprox	(	sfloat *	pFSpec1,
		int	sizeSpec1,
		int	sizeSpec1Used,
		sfloat *	pFSpec2,
		int	sizeSpec2,
		int	nCoefficients
	)

approximate a magnitude spectrum First downsampling using local maxima and then upsampling using linear interpolation. The output spectrum doesn't have to be the same size as the input one.

Parameters:

	pFSpec1	magnitude spectrum to approximate
	sizeSpec1	size of input spectrum
	sizeSpec1Used	size of the spectrum to use
	pFSpec2	output envelope
	sizeSpec2	size of output envelope
	nCoefficients	number of coefficients to use in approximation

Returns:

error code

See also:

SMS_ERRORS (or -1 if the algorithm just messes up, it will print an error of its own.

References MAX, MIN, sfloat, sms_error(), SMS_MALLOC, and SMS_OK.

Referenced by InterpolateArrays(), sms_hybridize(), sms_stocAnalysis(), sms_stochastic(), and StocSynthApprox().

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