cb_filt.tes

speech signal process tools

#!/bin/sh
# 9/7/93 @(#)cb_filt.tes	1.1

USE_ESPS_COMMON=off;export USE_ESPS_COMMON
ESPS_VERBOSE=0;export ESPS_VERBOSE

donefile='/tmp/done'
outfile='/tmp/out'
echo "The following filters designed have:"
echo "	 sampling rate 8000"
echo "Designing Lows pass filter, visually inspect if it is:"
echo "   passband ends at 1600, stopband start at 2000"
echo "   maximally flat on the passband"

cat > $donefile << END
int filt_length_L = 31;
int filt_length_S = 21;
float samp_freq = 8000.000000;
int nspec = 5;
string model = "cosine";
string push_direction = "neither";
string spec1_type = "limit";
string spec1_sense = "+";
float spec1_edge1 = 0.000000;
float spec1_edge2 = 1600.000000;
float spec1_bound1 = 1.000000;
float spec1_bound2 = 1.000000;
string spec1_hug = "hugged";
string spec1_interp = "arithmetic";
string spec2_type = "limit";
string spec2_sense = "-";
float spec2_edge1 = 0.000000;
float spec2_edge2 = 1600.000000;
float spec2_bound1 = 0.900000;
float spec2_bound2 = 0.900000;
string spec2_hug = "not hugged";
string spec2_interp = "arithmetic";
string spec3_type = "limit";
string spec3_sense = "+";
float spec3_edge1 = 2000.000000;
float spec3_edge2 = 4000.000000;
float spec3_bound1 = 0.100000;
float spec3_bound2 = 0.100000;
string spec3_hug = "not hugged";
string spec3_interp = "arithmetic";
string spec4_type = "limit";
string spec4_sense = "-";
float spec4_edge1 = 2000.000000;
float spec4_edge2 = 4000.000000;
float spec4_bound1 = -0.100000;
float spec4_bound2 = -0.100000;
string spec4_hug = "not hugged";
string spec4_interp = "arithmetic";
string spec5_type = "concave";
string spec5_sense = "-";
float spec5_edge1 = 0.000000;
float spec5_edge2 = 1600.000000;
END
cb_filt -P$donefile  $outfile
filtspec -ml $outfile - |plotspec -

echo "Designing highpass filter, check visually"
echo "   stopband ends at 1600, passband ends at 2000"
echo "   maximally flat on stopband"
#--------CONSTRAINT_BASED HIGHPASS --------------------
cat > $donefile << END
int filt_length_L = 31;
int filt_length_S = 21;
float samp_freq = 8000.000000;
int nspec = 5;
string model = "cosine";
string push_direction = "neither";
string spec1_type = "limit";
string spec1_sense = "+";
float spec1_edge1 = 0.000000;
float spec1_edge2 = 1600.000000;
float spec1_bound1 = 0.100000;
float spec1_bound2 = 0.100000;
string spec1_hug = "hugged";
string spec1_interp = "arithmetic";
string spec2_type = "limit";
string spec2_sense = "-";
float spec2_edge1 = 0.000000;
float spec2_edge2 = 1600.000000;
float spec2_bound1 = -0.100000;
float spec2_bound2 = -0.100000;
string spec2_hug = "not hugged";
string spec2_interp = "arithmetic";
string spec3_type = "limit";
string spec3_sense = "+";
float spec3_edge1 = 2000.000000;
float spec3_edge2 = 4000.000000;
float spec3_bound1 = 1.000000;
float spec3_bound2 = 1.000000;
string spec3_hug = "not hugged";
string spec3_interp = "arithmetic";
string spec4_type = "limit";
string spec4_sense = "-";
float spec4_edge1 = 2000.000000;
float spec4_edge2 = 4000.000000;
float spec4_bound1 = 0.900000;
float spec4_bound2 = 0.900000;
string spec4_hug = "not hugged";
string spec4_interp = "arithmetic";
string spec5_type = "concave";
string spec5_sense = "-";
float spec5_edge1 = 2000.000000;
float spec5_edge2 = 4000.000000;
END
cb_filt -P$donefile  $outfile
filtspec -ml $outfile - |plotspec -

#--------------DIFFERENTIATOR---------------------------
echo "Designing a differentiator, visually inspect the response"
echo "   passband with a slope 1 goes from 0 to 2000"
echo "   stopband starts at 3200"
cat > $donefile << END
#
float samp_freq = 8000;
string model = "sine";
string push_direction = "left";
int filt_length_L = 16;
int filt_length_S = 16;
 
string spec1_type = "limit";
string spec1_sense = "+";
string spec2_type = "limit";
string spec2_sense = "-";
float spec1_edge1 = 0;
float spec2_edge1 = 0;
float spec1_edge2 = 2000;
float spec2_edge2 = 2000;
float spec1_bound1 = .01;
float spec1_bound2 = 0.26000;
float spec2_bound1 = 0;
float spec2_bound2 = 0.25000;
string spec1_hug ="not hugged";
string spec1_interp ="arithmetic";
string spec2_hug ="hugged";
string spec2_interp ="arithmetic";
 
string spec3_type = "limit";
string spec3_sense = "+";
string spec4_type = "limit";
string spec4_sense = "-";
float spec3_edge1 = 3200;
float spec3_edge2 = 4000;
float spec4_edge1 = 3200;
float spec4_edge2 = 4000;
float spec3_bound1 = 0.01;
float spec3_bound2 = 0.01;
float spec4_bound1 = -0.01;
float spec4_bound2 = -0.01;
string spec3_hug ="not hugged";
string spec3_interp ="arithmetic";
string spec4_hug ="not hugged";
string spec4_interp ="arithmetic";
 
int nspec =4;
int nspec_pushed = 2;
int spec1_pushed = 4;
int spec2_pushed = 3;
END
cb_filt -P$donefile  $outfile
filtspec -ml $outfile - |plotspec -
rm $donefile
rm $outfile