ADRECORD

ADRECORD

This atom is a test implementation for automatic segmentation using adaptive background amplitude estimation during real-time recording. It is based on the atom ADASEG. A detailed documentation will be included after finishing testing and debugging.

This SPAtom was developed for the NOIDESc project in 2006.

Usage:

ADRECORD X1 X2 WOUT TPAR TSEG

Inputs:

X1, X2

The signal of channel 1 and 2, none-overlapping frames.

WOU

The output wave item.

TPAR

The parameter input table. This is an extended table with 1 numeric field and at least 2 rows.

Row/Column Index	Name	Description	Default Value
[0,0]	aw,	use spectral A weighting (0/1)	1
[1,0]	fmin/Hz,	minimum analysis frequency	0
[2,0]	fmax/Hz,	maximum analysis frequency	8000

3	prms/%	background rms percentage	95
4	tdelay/s	background level estimation time	60
5	tsignal/s	minimum signal duration	3
6	tpause/s	minimum pause between signals (= maximum pause in the signal segments)	2
7	tpre/s	pre-offset = time subtracted from the detected beginning (>=0)	1
8	tpost/s	post-offset = time added to the detected end (>=0)	1
9	lsignal/dB	minimum offset of signal to background	10
10	lpause	background level estimation range (0<lpause<lsignal)	6

TABSEG

The segment output table. This is an extended table with 10 numeric fields and must be empty on initialization.

[i,0]	segment begin (frame index) (s)
[i,1]	segment end time (s)
[i,2]	segment duration (s)
[i,3]	long time rms (dB)
[i,4]	long time spectral cut-off amplitude (dB)
(for each channel where ch = 1..n)
[i,5*ch]	amax region begin (s)
[i,6*ch]	amax region end (s)
[i,7*ch]	amax region duration (s)
[i,8*ch]	amax region offset to segment begin (s)
[i,9*ch]	L95 - RMS level reached by 95% of the segment frames (dB).
[i,10*ch]	L05 - RMS level reached by 5% of the segment frames (dB).
[i,11*ch]	L01 - RMS level reached by 1% of the segment frames (dB).
[i,12*ch]	Lamax - The average energy level of the amax region (dB).
[i,13*ch]	Leq - The average energy level for the segment (dB).

Examples:

[spu test2spu wi wo n tpar tseg]

a1 = asigin

a2 = adrecord

a1 $wi 0 $n 1 0

a2 X1=a1.x1 X2=a1.x2 WOUT=$wo TPAR=$tpar TSEG=$tseg