ADANA1

ADANA1 - basic spectral descriptors

This SPAtom was developed for the NOIDESc project in 2006.

Usage:

ADANA1 A AREF A0 AW DF FMIN FMAX DT DATA

Inputs:

A

An FFT amplitude spectrum (linear).

AREF

The reference amplitude (linear).

AW

The spectrum weighting: 0=NONE, 1=A (dBA).

A0

The amplitude normalization for descriptor computation in dB.

DF

The FFT frequency resolution in Hz.

FMIN, FMAX

The frequency range in Hz.

DT

The time resolution (hopsize) in seconds.

DATA

The output table (either an extended or parameter table with 6 numeric fields)

DATA[*,0] - the rms energy in dB

DATA[*,1] - the centroid in Hz

DATA[*,2] - the spread

DATA[*,3] - the skew

DATA[*,4] - the flux, 1st oder = correlation coef. of two spectra

DATA[*,5] - the (neg.) slope in dB / kHz

Note: The input A0 is used as offset (floor) for the computation of centroid, spread and skew. This means first A0 is subtracted from the log. amplitude spectrum and than the negative amplitudes are truncated (set to 0).