man.diff

来自「speech signal process tools」· DIFF 代码 · 共 107 行

.\" Copyright (c) 1987 Entropic Speech, Inc.; All rights reserved
.\" @(#)spectrans.1	3.7 3/28/97
.TH SPECTRANS 1\-ESPS 3/28/97
.ds ]W "\fI\s+4\ze\h'0.05'e\s-4\v'-0.4m'\fP\(*p\v'0.4m'\ Entropic Speech, Inc.
.SH "NAME"
spectrans - transform spectral parameters in a FEA_ANA file
.SH "SYNOPSIS"
.B spectrans 
[
.BI \-x " debug_level"
] [
.BI \-w " grid_width"
] [
.BI \-m " spec_rep"
] 
.I " infile.fea outfile.fea"
.SH "DESCRIPTION"
.PP
.I Spectrans
transforms the spec_param field of a FEA_ANA file
.I infile.fea
to a different spectral representation and outputs the FEA_ANA file
.I outfile.fea.  
The output spectral representation is is determined
by the \fB\-m\fP option.  If
.I infile.fea
is equal to "\-", 
then standard input is used. If
.I outfile.fea
is equal to "\-", standard output is used.  
If the 
.B \-m
option specifies the current spectral representation 
of 
.I infile.fea,
.I spectrans
exits with a warning message and without creating 
.I outfile.fea.
.PP
See \fItranspec\fR(1\-ESPS)
for transforming paramters from ordinary FEA(5\-ESPS)
files.
.SH OPTIONS
.PP
.TP
.BI \-x " debug_level"
.I Debug_levels 
greater than 0 cause messages to print to stderr.
.TP
.BI \-w " grid_width"
\fIGrid_width\fR is the nominal spacing (in Hz.) of the 
grid used in the search for LSFs. It is used only during
computation of LSF values, and if not specified, a default value
of 4 Hz. is used. Reasonable values for \fIgrid_width\fR depend on the
bandwidth of the original sampled data, but for 4 kHz. data,
values between 2 and 62 Hz. are reasonable.
.TP
.BI \-m " spec_rep"
.I Spec_rep
is the type of spectral parameter to put in the output FEA_ANA file.
Legal values are defined in 
.I <esps/anafea.h>, 
but they include the following:
AUTO == normalized autocorrelations, RC == reflection coefficients,
AFC == autoregressive filter coefficients, LAR == log area ratios, 
CEP == cepstrum coefficients, and 
LSF == line spectral frequencies.
.SH "ESPS PARAMETERS"
.PP
The ESPS parameter file is not read by 
.I spectrans.
.SH ESPS COMMON
.PP
The ESPS Common file is not read by 
.I spectrans. 
.SH ESPS HEADERS
.PP
Values in the header of 
.I outfile.fea
are copied from  the values in the header of 
.I infile.fea, 
except for the spec_rep type.
It takes on the 
.B \-m
specified value.  Also, if the parameter is being converted to LSFs,
then a generic header item \fILSF_grid_width\fR of type double is
added that contains the \fB\-w\fR value.
.SH "FUTURE CHANGES"
.PP
Add AF (area functions) as 
spectral parameters that are supported.
.SH "SEE ALSO"
.PP
.nf
\fIrefcof\fP(1\-ESPS), \fIlpcana\fP(1\-ESPS), \fIme_spec\fP(1\-ESPS),
\fIESPS\fP(5\-ESPS), \fIFEA_ANA\fP(5\-ESPS), \fItranspec\fP(1\-ESPS)
.fi
.SH "BUGS"
.PP
None known.
.SH "AUTHOR"
.PP
Manual page and program by David Burton.  Converted to 
ESPS 3.0 by John Shore.