rel4.2.me

来自「speech signal process tools」· ME 代码 · 共 445 行 · 第 1/2 页

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.he 'ESPS Version 4.2 Release Notes''page %'
.ce 3
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ESPS Version 4.2 Release Notes
.sp
Document version: 1.4 2/1/93
.sh 1 "INTRODUCTION"
.lp
This document provides notes for release 4.2 of ESPS.  These release
notes document changes to ESPS since the revision 4.1.  This document
can be viewed conveniently using \fIeinfo\fP (1\-\s-1ESPS\s+1) or
\fIeversion\fP (1\-\s-1ESPS\s+1).
.lp
Note that when shipped as an update (i.e. not to new customers) new
hardcopy manuals are not provided.   The online documentation is up to
date.  Please refer to the online manual pages for all programs and
library functions mentioned below.
.sh 1 "SUMMARY OF MAJOR CHANGES"
.lp
This release is primarily a maintenance release and most of the changes
were bug fixes to programs and error corrections to the documentation.
Major highlights include:
.ip \ \ \ \(bu
major improvements to the filter design and filtering programs
.ip \ \ \ \(bu
license manager startup delay reduced from 3 minutes to 1 minute
.ip \ \ \ \(bu
automatic checkout of ESPS license when required
.ip \ \ \ \(bu
\fIe2sphere\fR a license\-free program added to convert ESPS files to Sphere header files
.ip \ \ \ \(bu
updated documentation
.sh 1 "CHANGES TO USER-LEVEL ESPS PROGRAMS"
.sh 2 "CHANGES TO FILTER PROGRAMS"
.lp
In the ESPS 4.2 release, the numerical stability of many filter
programs is improved.  The new \fIfilter2\fR program implements an IIR filter
in cascade form of second order sections, rather than in direct form
implementation as in the old \fIfilter\fR program. 
The \fIfilt_spec\fR and \fIimpulse_rs\fR programs have been
re-written for numerical stability for high order IIR filters.
.lp
The library functions \fIblock_filter2(3-ESPS)\fR and \fIinit_fdata(3-ESPS)\fR, 
the core functions of \fIfilter2\fR, 
replace the old \fIblock_filter(3-ESPS)\fR in the library.  The function 
\fIfil_spectrum(3-ESPS)\fR
is added to the library for computing filter spectral characteristics.
.lp
Chebyshev2 and elliptical IIR filter design methods are added in the
\fIiir_filt\fR program.  The user-interface of \fIiir_filt\fR is 
made easier than the
previous release by requiring only the input parameters of passband
and stopband frequencies and loss characteristics.
.lp
A binary \fIsfconvert\fR program has been written to replace the old 
\fIsfconvert\fR
shell script for sampling frequency conversion.  The new program
allows user to have complete control over trade-off between
computation efficiency vesus accuracy.
.lp
\fIwmse_filt\fR now stores correct number of bandedges in the \fIbandedges\fR
generic header item.
.sh 3 "SPECIFIC CHANGES TO FILTER PROGRAMS"
.np
\fIiir_filt\fR - Major IIR filter improvements:
.sp
Elliptical and  Chebyshev II are now supported.
.sp
Only need to specify stop/passband frequencies and stop/passband loss
for filter design.  No need to estimate the order, no need to know
what 3dB frequency (for Butterworth), or critical frequency (for
Cheveyshev1)
is, if the user is not familiar with filter design.  The new \fIiir_filt\fR
allows a precise control on filter characteristics.
.sp
The program computes the optimal filter order.  But the user
has an option of over-riding the filter order by means of supplying
his own filter order in the parameter file.
.sp
No array parameter input.  This means you can run \fIiir_filt\fR with
\fIxwaves\fR by the use of \fIxeparam\fR to design a filter and 
process the data on the fly.
.sp
Maximum passband gain is normalized to 0dB.  The old \fIiir_filt\fR
has its maximum passband amplitude different from 0dB if the filter
order is odd.
.np
\fIwmse_filt\fR - this program now checks for a license checkout before
the user enters the parameters.   The header item \fInbands\fR has been
fixed to store the correct number of bandedges.
.np
\fIfilter2\fR - a new numerically-stable filtering program intended to
replace the existing program \fIfilter\fR.  
.np
\fIsfconvert\fR - this is an all new program (the old script by the same
name is gone).   It has a number of new options and is much faster than
the previous shell script version.   See the man page for details.
This program is also linked to the name \fIesfconvert\fR to avoid a name
clash on SGI machines by an SGI supplied program named \fIsfconvert\fR.
.np
\fIxsfconvert\fR - XIG version of the new \fIsfconvert\fR.
.np
\fIimpulse_rs\fR - improved the numerical stability.
.np
\fIfiltspec\fR - improved the numerical stability.
.np
\fIplotspec\fR - improved the numerical stability.
.sh 2 "CHANGES TO OTHER PROGRAMS"
.np
\fIvqasc\fR - this program has a new option \fB-l\fR to specify the
maximum length of input lines (removing a hard-coded limit).
.np
\fIvq\fR - no longer limits the maximum codeword dimension to 1000.
Allocations are done dynamically as needed.
.np
\fIlpcana\fR - now uses \fIanal_method\fR correctly from the parameter
file.
.np
\fIexprompt\fR - the output parameter file is now deleted if exit was
not the result of clicking on DONE.
.np
\fIme_spec\fR - the parameters \fIstartrec\fR and \fInrecs\fR have been
changed to \fIstart\fR and \fInan\fR to be consistent with other ESPS programs.
.np
\fIfea_stats\fR - the standard output has been made more readable for
non-stat files (changed output format from %f to %e).  
An error message has been added to indicate if the
covariance matrix is singular.
.np
\fIrefcof\fR - the \fB-S0\fR option has been fixed.
.np
\fIpsps\fR - now prints the correct bandedges header items for FIR
FT_FILT files.  This program is linked to the name \fIepsps\fR to avoid a
name clash with a Sun supplied \fIpsps\fR (part of Open Windows).
.np
\fItestsd\fR - fixed sine drift problem.
.np
\fIacf\fR - this program now correctly computes the start time of the
output file in cases where input files have negative start times.  
.np
\fIfftcep\fR - this program now correctly outputs both real and
imaginary parts of the complex cepstrum.
.np
\fIfea_stats\fR - this program computes an inverse covariance matrix
using \fImatrix_inv\fR(3\-ESPS).   The old \fImatrix_inv(3\-ESPS)\fR 
had a broken
singular matrix check, so a bad inverse covariance matrix was generated
silently in the \fIfea_stats\fR output.
.np
The following programs now place temporary files in the directory
specified by the environment variable \fBESPS_TEMP_PATH\fR: acf, addfea,
auto cross_cor, dither, frame, lpcana, mergefea, refcof, select, setmax,
addgen, copysps, rem_dc, fea_stats, fea_edit, addclass, and comment.
.np
\fIgpstohp\fR - this is the GPS to HP Laserjet filter.   This has been
improved so that it produces smaller output files for a given plot.  In
many cases the data sent to the printer has been cut in half.   This
filter is called by the plot programs when the \fB-Thp\fR option is
used.
.np
\fIplotsd\fR - this program used to subsample (plot by simply skipping
points) if the number of points to plot exceeds the available number of
pixels.  Now the program plots the min and the max of a segment.  This
produces plots that look just like \fIxwaves\fR.
.np
\fIplotsd\fR - fixed to work with ESPS common processing turned off and
removed the (now useless) \fB-P\fR option.
.np
\fIplaytest\fR - fixed man page to mention that script lines are run
twice.  Also the (nonfunctional) \fB-n\fR option has been removed.
.np
\fIplot3d\fR - after \fIplot3d\fR started up (on Suns), the initial graph was
offset and
scaled differently than the space the cursor was moving in.
This was fixed by having the plot frame size established BEFORE the
enclosed canvas was created.
.np
\fIaddfea\fR - this program failed on SGI machines when the \fB-f\fR option
was not used.   It has been fixed.
.np
\fItofspec\fR - The \fB-s\fR option was added to allow specification of the
generic header
item \fIsf\fR in the output file.  This is a generally useful change as it
permits control over the frequency scale when the output is displayed
via \fIxwaves\fR.
This change (when coupled with an \fIxspecav\fR script change) fixes the
fairly serious \fIxwaves\fR display bug that shows incorrect frequency scale
for spectral averages.
Note that there's a corresponding parameter as well (\fIsf\fR).  If it is
not present or has zero value (also the default of \fB-s\fR), then the old
behavior is used.
.np
\fIsend_xwaves\fR - Implemented and documented blocking in \fIsend_xwaves\fR.
This permits any
\fIxwaves\fR command to be issued reliably from \fIsend_xwaves\fR 
without concern
about completion of a previous command.
This new version of \fIsend_xwaves\fR must be used with the new version of
\fIxwaves\fR (3.1).  However, the old \fIsend_xwaves\fR will work ok with the
new \fIxwaves\fR.
.np
\fIfft\fR and \fIfftinv\fR -
.sp
Now both \fB-S0\fR on the command line and \fIstep\fR = 0 in the parameter
file imply a step equal to the default; the frame length.  
.sp
Omitting the end of the range in the fft \fB-r\fR option is now equal to
setting \fInan\fR = 0 in the parameter file and implies processing from the
starting point through the end of the file.
.sp
The manual page has been fixed to document nan adequately.
.sp
Previous version would not run on a pipe with \fInan\fR = 0. The main problem
with \fInan\fR = 0 on a pipe is that the default frame