wavesdesc.me

来自「speech signal process tools」· ME 代码 · 共 307 行

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.he 'WAVES+ PRODUCT DESCRIPTIONS''page %'
.fo 'Version 1.8'\\*(ep'5/18/89'
.nf
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\s+4\fB\*(ep ENTROPIC SPEECH, INC.\fR\s-4
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\s+1\fBWAVES+ PRODUCT DESCRIPTIONS\s-1\fR


.sp .3i
Entropic Speech, Inc.
Washington Research Laboratory
600 Pennsylvania Ave. S.E., Suite 202
Washington, D.C. 20003
202-547-1420 (voice)
202-546-6648 (FAX)
.sp .5i
.fi
.sh 1 "INTRODUCTION"
.lp
This note contains a brief description of \fIwaves\fP+, the
interactive graphics interface to the Entropic Signal Processing
System (ESPS).  It also describes the differences among the various
\fIwaves\fP+ products.
.sh 1 "AT&T WAVES"
.lp
Entropic's \fIwaves\fP+ products are derived from \fIwaves\fP, a
program written by David Talkin of AT&T Bell Laboratories, Murray
Hill, and licensed by Entropic.
.lp
\fIWaves\fP exploits windows, pop-up menus, and mouse interaction to
facilitate the time-synchronous viewing, spectrum analysis, editing,
annotation, and playback of multiple signal representations.
Time-coordinated windows with synchronous cursors can display
sampled-data, spectrograms, and analysis-parameter tracks.
.lp
For example, the time series data from a speech waveform can be
displayed together on the same monitor with its spectrogram and its
fundamental frequency contour.  Cursor movement in one view is time
aligned with the other views (all views may be time-synchronized or
displayed independently), so finding an event in one view of the data
results in finding the event in all the data views.  
.lp
\fIWaves\fP operates on files written with the SIGnal header system.
It runs on Sun workstations (Sun 3, Sun4, Sun 386i).  To compute
spectrograms and to provide for speech I/O, \fIwaves\fP depends on a
proprietary AT&T DSP32 board.  This board requires a VME bus and
operates with Sun 3 and Sun 4 workstations.  A PC bus board that
operates with Sun 386i workstations will be supported shortly.
Spectrogram parameters (window size, window type, time step,
pre-emphasis, FFT order, etc.) can be controlled by the user from
ASCII parameter files.  Once displayed, the data in spectrogram
windows will not be re-scaled if the window is re-sized.  
.sh 2 "Waves Menus"
.lp
Via pop-up menus, \fIwaves\fR supports the playing of selected speech
segments through the proprietary AT&T DSP32 board, moving forward or
backward in the data display, zooming in or zooming out, computation
and display of both wide band (fine temporal resolution) and narrow
band (fine frequency resolution) spectrograms in near real-time using
the DSP32 board, saving marked segments to a named file, cutting and
pasting a segment from a data display, and editing a displayed
waveform.  When \fIwaves\fP is being run on a monochrome monitor and a
spectrogram is computed on the DSP32 board, the DSP32 uses a digital
halftone algorithm to compute and return a dithered spectra for
display on the monochrome monitor.  Spectral files written by
\fIwaves\fP for later viewing can only be viewed on color (i.e.,
greyscale) monitors.  The spectrogram displays are not
.lp
When \fIwaves\fP runs on a color monitor, mouse movements can be 
used dynamically to change contour thresholds and intensity mappings.  
.sh 2 "Waves Attachments"
.lp
\fIWaves\fP supports "attachments", separately-running programs that
communicate with \fIwaves\fP via \fIunix\fP pipes and allow extended
operations to be performed on signals being viewed under \fIwaves\fP.
Two attachments are provided with \fIwaves\fP.  One is
\fIspectrum\fP, which allows the user to apply various spectrum
analysis methods to sampled data being viewed under \fIwaves\fP. The
other is \fIlabel\fP, which supports the interactive annotation of
sampled data files.  \fIWaves\fP also comes with the standalone 
program \fIformant\fP, which computes fundamental frequencies, 
formant frequencies, and formant bandwidths for speech sampled data.  
.sh 2 "Waves Command Files"
.lp
\fIWaves\fR may be customized to perform a variety of specialized
tasks through the use of \fIwaves\fP command files.  Commands can be
used to control the display parameters (such as what colormap to use,
where to place the display windows, etc.), control the data displays
(such as what file to overlay, where to put markers on a file, etc.),
and interact with the displayed files (such as play marked region,
compute spectrogram, connect attachment, etc.).
.sh 1 "WAVES+"
.lp
Changes from \fIwaves\fP to \fIwaves\fP+ fall into the several areas
described in the following subsections.  For details, see the
\fIwaves\fP+ (1\-\s-1ESPS\s+1) manual page.
.lp
Like \fIwaves\fP, \fIwaves\fP+ runs on Sun workstations (Sun 3, Sun4,
Sun 386i).  A future version will run on other systems under X Windows.  
.sh 2 "ESPS File I/O"
.lp
\Waves\fP+ reads and writes ESPS SD and FEA files (it also reads files
with SIGnal headers).  All \fIwaves\fP operations are supported for ESPS
files, including the cut, paste, and edit operations.  When plotting
FEA files, all fields are labelled from the self-description in the
file header.  Numeric types may vary from field to field.
\fIWaves\fP+ preserves ESPS record keeping and adds notations of
\fIwaves\fP+ editing to the comment section of output ESPS file
headers.  Output headers also contain the pre-\fIwaves\fP+ history.
Arbitrary fields from FEA files can be displayed in "spectrogram"
style, and the parameter tracks from arbitrary fields can be overlayed
on such "spectrogram" displays.  
.lp
When running on a monochrome monitor, \fIwaves\fP+ uses a digital
halftone algorithm to display a dithered version of any
spectrogram-style display from FEA files.  All spectrogram-style
displays, include dithered displays, are interpolated to fill the
display window.  Spectrograms are re-scaled vertically to fill the
window if the window is re-sized (applies to both color and monochrome
monitors).  
.sh 2 "Execution of External ESPS Programs"
.lp
\fIWaves\fP+ allows the user to run external ESPS programs on marked
signal segments and to view the results in new windows.  Two classes
of such external calls are supported.  The first class comprises ESPS
programs that produce ASCII output \- the results are displayed by
\fIwaves\fP+ in a new Sun text window.  Example programs in this class
include \fIpsps\fP (1\-\s-1ESPS\s+1), \fIpplain\fP (1\-\s-1ESPS\s+1),
\fIstats\fP (1\-\s-1ESPS\s+1), and \fIfea_stats\fP (1\-\s-1ESPS\s+1).
The second class comprises ESPS programs that produce ESPS file
outputs (e.g., \fIfilter\fP (1\-\s-1ESPS\s+1), \fIrefcof\fP
(1\-\s-1ESPS\s+1), and \fItranspec\fP (1\-\s-1ESPS\s+1)).  As is the
case with \fIsgram\fP, \fIwaves\fP+ can run such external ESPS
programs elsewhere on the network.  Users can also write their own
ESPS programs or shell scripts that produce ESPS files or ASCII output
and call them from \fIwaves\fP+.  
.sh 2 "Independence of DSP32 Board"
.lp
If the DSP32 board is not present (or is disabled), \fIwaves\fP+
computes spectrograms via a system call to the ESPS program
\fIsgram\fP (1\-\s-1ESPS\s+1).  If this program is available,
spectrograms are computed and then displayed by \fIwaves\fP+.  Such
external spectrogram computations can be done by the CPU on which
\fIwaves\fP+ is running, or by another CPU elsewhere on the network
(e.g., a faster Sun or a Convex).  If ESPS is installed and the
\fIwaves\fP+ global \fIsgram_prog\fP is changed to "me_sgram",
maximum-entropy spectrograms are computed instead of FFT spectrograms
(using the ESPS program \fIme_sgram\fP (1\-\s-1ESPS\s+1)).  
.lp
Requests for D/A conversion are turned into a system call to the ESPS
program \fIplay\fP.  If this program is available (it can be any
program or script that performs D/A conversion on ESPS files), speech
output can be performed from \fIwaves\fP+ without the DSP32 board.
This can be done using local hardware or network facilities.  
.sh 2 "Remote Use of DSP32 Board for Spectrogram Computations"
.lp
Entropic has developed a version of the standalone ESPS spectrogram
program \fIsgram\fP to compute spectrograms in near real time by means
of the DSP32 board.  This program, \fIdspsgram\fP (1\-\s-1ESPS\s+1),
can be run directly (or indirectly via shell scripts) by a local
user.  It can also be run remotely by users on other workstations 
by means of \fIrsh\fP and NFS or \fIunix\fP pipes.  
.sh 2 "New Global Parameters"
.lp
\fIWaves\fP+ has several new global parameters:
.nf
.ta .3i 1.6i

	\fIdebug_level\fP \-	if non-zero, triggers varying amount of debug output
	\fIverbose\fP \-	if non-zero, enables verbose progress messages
	\fIuse_dsp32\fP \-	toggles use of DSP32 board (if installed)
	\fIdsp32_wait\fP \-	specifies number of retries for DSP32 operations
	\fIsgram_prog\fP \-	the name of the external spectrogram program
	\fIplay_prog\fP \-	the name of the external D/A program
	\fIremote_path\fP \-	prepended to file names for external ESPS calls
	\fIimage_clip\fP \-	sets simulated greyscale limits on monochrome display
	\fIimage_range\fP \-	sets simulated greyscale limits on monochrome display
	\fIcommand_step\fP \-	if non-zero, command files will be executed single-step
	\fIshow_labels\fP \-	if zero, suppresses field names in signal displays
	\fIshow_vals\fP \-	if zero, suppresses field numerical values in signal displays

.fi
.sh 2 "Waves+ Attachments"
.lp
The attachments \fIspectrum\fP and \fIlabel\fP have been modified to
operate properly with ESPS files.  The standalone program
\fIformant\fP has been modified to read ESPS SD files and write ESPS
FEA files.
.sh 2 "Documentation via eman"
.lp
On-line and hardcopy documentation for \fIwaves\fP+, \fIspectrum\fP,
\fIlabel\fP, and \fIformant\fP has been changed to use the ESPS
program \fIeman\fP (1\-\s-1ESPS\s+1) \- the ESPS version of the UNIX
\fIman\fP program.
.sh 1 "AVAILABLE WAVES+ PRODUCTS"
.sh 2 "Basic Waves+"
.lp
Basic waves+ consists of \fIwaves\fP+, \fIspectrum\fP, \fIlabel\fP,
and \fIformant\fP \- all as described in Section 3.  The ESPS program
\fIeman\fP is included (for the HELP commands), but no other ESPS
programs are included.  This means, for example, that spectrograms can
only be done with the AT&T DSP32 board.
.lp
This version of \fIwaves\fP+ is mainly of interest to those who
already have ESPS installed.  The product numbers are W+-S3 and
W+-S4 for Sun 3 and Sun 4 Workstations respectively, and W+-S386i for 
the Sun 386i.  
.sh 2 "Standalone waves+"
.lp
Standalone \fIwaves\fP+ consists of Basic \fIwaves\fP+ and sixteen
ESPS binary support programs.  The ESPS support programs facilitate
the import and export of non-ESPS ASCII and binary files, and the 
computation of spectrograms without the DSP32 board.  This version is 
of interest to those who do not have ESPS, but who wish to use
\fIwaves\fP+ to view and manipulate data computed by non-ESPS
programs, and who wish to compute and view spectrograms.  
.lp
The following ESPS programs are included in Standalone \fIwaves\fP+:
.nf
.ta .3i 1.6i

	\fIaddfea\fP \-	adds a new FEA file field based  on ASCII data
	\fIaddfeahd\fP \-	adds an ESPS feature file header to non-ESPS binary data
	\fIaddgen\fP \-	adds a generic header item to an existing  or new ESPS file header
	\fIbhd\fP \-	behead an ESPS file
	\fIbtosps\fP \-	convert binary sampled data file to an ESPS SD file
	\fIcomment\fP \-	displays or appends to comment field in ESPS file headers
	\fIeman\fP \-	displays or prints ESPS manual pages
	\fIeparam\fP \-	run an ESPS program with parameter prompts
	\fIfea_element\fP \-	prints binary format table for ESPS FEA files
	\fIhditem\fP \-	print an item from an ESPS header
	\fIhdshrink\fP \-	remove embedded headers from an ESPS file
	\fIils_esps\fP \-	convert an ILS sampled data file to an ESPS file
	\fIpplain\fP \-	print values from ESPS file in "plain format"
	\fIpsps\fP \-	print headers and data from ESPS file in "pretty format"
	\fIpspsdiff\fP \-	differential ESPS file comparator
	\fIsgram\fP \-	compute FFT-based narrow- or wide-band spectrogram
	\fIsigtosd\fP \-	convert SIGnal sampled data file to ESPS
	\fItofspec\fP \-	converts FEA data to FEA_SPEC file (for spectrogram displays)
.fi
.lp
The product numbers for Standalone \fIwaves\fP+ are W+SA-S3 and
W+SA-S4 for Sun 3 and Sun 4 Workstations respectively, and W+SA-S386i
for the Sun 386i.  
.sh 2 "Full ESPS with waves+"
.lp
When full ESPS is installed together with Basic \fIwaves\fP+, all of
the Standalone \fIwaves\fP+ features are available plus more.  
.lp
ESPS signal processing programs can be used to extend the operations
available from \fIwaves\fP+ menus.  Here are some examples:
\fIme_sgram\fP can be used in place of \fIsgram\fP to compute
maximum-entropy-based (rather than FFT-based) spectrograms;
\fIfilter\fP can be used to filter marked segments, with \fIwaves\fP+
automatically displaying the filtered signal in a window that is
time-synchronized with the unfiltered signal (the ESPS programs
\fIwmse_filt\fP and \fIiir_filt\fP can be used to design the filters);
and \fIfea_stats\fP can be used to compute statistics on marked
segments, with \fIwaves\fP+ automatically displaying a text-window
containing the results.
.lp
ESPS file manipulation programs can be used to extend the operations
that can be performed on data converted to ESPS FEA files.  For
example, \fIfea_edit\fP edits arbitrary ESPS FEA files, \fIselect\fP
applies arbitrary queries to allow interactive record selection from
FEA files and to compute expressions on the data in FEA fields;
\fIfea_deriv\fP allows the merging of data from separate FEA fields;
and \fIclassify\fP performs maximum-likelihood pattern classification
of data in FEA fields.
.lp
ESPS standalone plot programs support hardcopy plotting of
sampled-data, spectra, and FEA field data, and they extend the
\fIwaves\fP+ plotting capabilities to include scatter plots,
histograms, and spectrograms scaled to arbitrary window sizes.
.lp
Those with ESPS source licenses may find useful the source to the
generic \fIplay\fP program.  If this program is modified to provide
D/A by means of locally-available facilities, it can be used to
provide speech output from \fIwaves\fP+.
.sh 2 "Waves+ DSP32-Support Package"
.lp
Sun 3 and Sun 4 \fIwaves\fP+ users with access to the AT&T DSP32 board
can use it for \fIwaves\fP+ spectrogram computations and speech I/O.
The \fIwaves\fP+ DSP32-Support Package includes all of the necessary
drivers, support programs, and installation instructions.  Also
included are standalone \fIrecord\fP, \fIplay\fP, and \fIdspsgram\fP
programs that use the board for respectively for A/D conversion, D/A
conversion, and near real-time spectrograms.  
.lp
The ESI product number for the DSP32-Support Package is W+DSP32.