prep: Manual Page

PREP

NAME

prep - waveform preparation

SYNOPSIS

prep (-a|-16|-s scaledb) (-p|-d) (-n) (-r) (-i item) file

DESCRIPTION

prep is a program to perform standard waveform preparation functions of AGC, pre-emphasis and de-emphasis or inversion. The pre-emphasis and de-emphasis coefficient is fixed at 0.96. Multiple options work together (not "p" and "d"), order of effect is emphasis, agc, inversion. One operation must be selected.

Options and their meanings are:

-I Identify program and exit.

-a Select automatic gain adjustment, Maximum (minimum) of waveform is set to 2047 (-2047).

-16 Select automatic gain adjustment, Maximum (minimum) of waveform is set to 16383 (-16383).

-s scaledb Scale waveform by supplied number of db (+ve = amplify, -ve = attenuate).

-p Select pre-emphasis, lift spectrum by 6db/octave > 100Hz.

-d Select de-emphasis, flatten spectrum by 6db/octave > 100Hz.

-n Select waveform inversion.

-B -r Select waveform rectification.

-i item Select input item.

INPUT ITEMS

1.xx Any speech item.

2.xx Any excitation item.

VERSION/AUTHOR

1.3 - Mark Huckvale.

_{Fri Jul 09 14:54:35 2004}