ENVELOPE
NAME
envelope - generate amplitude envelope track of speech waveform
SYNOPSIS
envelope
(-i item) (-w windowsize) (-h) (-d) file
DESCRIPTION
envelope
produces a smoothed amplitude envelope of a speech pressure waveform
as a track item at the same sampling frequency.
The envelope is calculated from the sum-squared sample values in
a given window. The window is supplied on the command line. A rectangular
window is used by default, but a hamming window is an option.
Options
and their meanings are:
-I
Identify program and exit.
-i item
Select input item number.
-w windowsize
Specify the envelope window width in seconds. Default 1ms.
-h
Use hamming window. Default rectangular.
-d
Output in dB (10log10(envelope)).
INPUT ITEMS
1.xx
Any speech waveform.
OUTPUT ITEMS
16
Amplitude envelope.
VERSION/AUTHOR
1.0 - Mark Huckvale.
Fri Jul 09 14:54:34 2004