RESAMP
NAME
resamp - resample waveform to new rate
SYNOPSIS
resamp
(-I) (-i item) (-F) (-f new_sampfreq) file
DESCRIPTION
resamp
returns a new item sampled at a different frequency.
The new and old sampling rates should be related by a simple rational number.
The sampling rate change is done in stages, each stage involves going up
n times in frequency and down d times. n and d are determined automatically
at each stage. Filtering may be done using
1) IIR elliptic
filters with passband ripple and stopband attenuation of 0.2db and approx 80db
respectively.(default)
2) or FIR
filters with passband ripple and stopband attenuation of 0.2db and approx 70db
respectively. (-F flag has to be used)
Options
and their meanings are:
-I
Identify program and exit.
-i item
Select input item type and subtype.
-f new_sampfreq
Specify integer sampling rate in Hz.
-F (null)
Use FIR filters instead of IIR.
NOTE
The new sampling rate should always be different from the old.
If the new sampling rate results in very large interpolation or decimation
factors, the filters designed by this program will be almost unstable if IIR.
Arithmetic errors would then cause problems.
If FIR these filters might not have been designed.
INPUT ITEMS
1.xx
2.xx Any waveform item
OUTPUT ITEMS
1.
2. The same item as input
VERSION/AUTHOR
1.1 - K Frimpong-Ansah (17/3/87)
2.0 - Mark Huckvale
Fri Jul 09 14:54:32 2004