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2010-11-18T16:31:56Z

1 revision: Initial import

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initial import

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====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 <code>[[Programmer Guide/SPU Reference/ADASEG - RMS based automatic segmentation|ADASEG]]</code>. A detailed documentation will be included after finishing testing and debugging.

This SPAtom was developed for the NOIDESc project in 2006.

=====Usage:=====

<code>ADRECORD <var>X1 X2 WOUT TPAR TSEG</var></code>

=====Inputs:=====

;<var>X1, X2</var>

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

;<var>WOU</var>

:The output wave item.

;<var>TPAR</var>

: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
|}

;<var></var>

{|
|-
|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<nowiki>-</nowiki>offset = time subtracted from the detected beginning (>=0)
|1
|-
|8
|tpost/s
|post<nowiki>-</nowiki>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
|}

;<var>TABSEG</var>

: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<nowiki>-</nowiki>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 <nowiki>-</nowiki> RMS level reached by 95% of the segment frames (dB).
|-
|[i,10*ch]
|L05 <nowiki>-</nowiki> RMS level reached by 5% of the segment frames (dB).
|-
|[i,11*ch]
|L01 <nowiki>-</nowiki> RMS level reached by 1% of the segment frames (dB).
|-
|[i,12*ch]
|Lamax <nowiki>-</nowiki> The average energy level of the amax region (dB).
|-
|[i,13*ch]
|Leq <nowiki>-</nowiki> 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

Programmer Guide/SPU Reference/ADRECORD - Revision history

Admin: 1 revision: Initial import

193.171.195.8: initial import