NAME

Envelope - calculate signal amplitude


SYNOPSIS

       <in.H  Envelope  [tc1=1 tc2=1 freq=0]  >out.H


INPUT PARAMETERS

tc1 - integer
       half width of smoothing triangle on 1-axis.
tc2 - integer
      half width of smoothing triangle on 2-axis.
      units of tc are sample points.
freq - integer
      [1] produce instantaneous frequency instead of envelope


DESCRIPTION

 Analytic signal amplitude.


CATEGORY

seis/filter