.\"@(#)synt.1 1.5 1/22/87 .TH SYNT 1\-SPS 1/22/87 .ds ]W "\fI\s+4\ze\h'0.05'e\s-4\v'-0.4m'\fP\(*p\v'0.4m'\ Entropic Processing, Inc. .SH "NAME" synt \- Performs pitch-synchronous synthesis .SH "SYNOPSIS" .B synt [ .B \-d ] [ .BI \-x " debug_level" ] [ .BI \-h " his_file" ] [ .BI \-P " param_file" ] [ .BI \-s ] .VI \-p " range" .I ana_file sd_file .SH DESCRIPTION .PP .I Synt takes as input an SPS ANA file .I ana_file containing analysis information, performs pitch-synchronous synthesis, and outputs the synthesized speech to an SPS SD file .I sd_file. If the .B \-s option is specified, the output file is written as shorts, otherwise it is written in floating point format. .SH SPS PARAMETERS .PP The following parameters are read from the parameter file: .I " synt_interp," .I " synt_pwr," .I " synt_rc," .I " synt_order," .I " v_excit_method," .I " uv_excit_method," .I " synt_method." .I " post_filt_num" .I " post_filt_den" .TP .I synt_interp .IP If .I synt_interp is "none", then no interpolation is performed on the reflection coefficients from the ANA file. .IP .I synt_interp is "pulse", then the the reflection coefficients from the ANA file are interpolated at every pitch pulse. .IP .I synt_interp is "sample", then the the reflection coefficients from the ANA file are interpolated at every sample. .TP .I synt_pwr .IP If .I synt_pwr is "rawpulse", then the power per pulse in the synthesized speech is made to match that of the analyzed speech. .IP If .I synt_pwr is "lpcpulse", then the power per pulse in the synthesized speech is obtained from the LPC residual signal power. .TP .I synt_rc .IP If .I synt_rc is "ana", then the reflection coefficients are taken as is from the input ANA file. .IP If .I synt_rc is "sinx", then the reflection coefficients from the ANA file are converted to autocorrelations and extrapolated, sin(x)/x windowing is applied, and then the autocorrelations are converted back to reflection coefficients for synthesis. .TP .I synt_order .IP If .I synt_order = 0, then the order of the synthesis filter is determined by the ANA file header entries .I hd.ana->order_vcd and .I hd.ana->order_unvcd. .IP If .I synt_order != 0, then the order of the synthesis filter is MIN(\fIsynt_order,hd.ana->order.vcd\fP) for voiced speech and MIN(\fIsynt_order,hd.ana->order.unvcd\fP) for unvoiced speech. .TP .I v_excit_method .IP If .I v_excit_method is "impulse", a single impulse is used as the excitation function for each pitch pulse in the case of voiced speech. .IP If .I v_excit_method is "white", white noise is used as the excitation function for each input pitch pulse in the case of voiced speech. The result is so-called "whispered speech". .TP .I uv_excit_method .IP If .I uv_excit_method is "white", white noise is used as the excitation function for a single ANA frame in the case of unvoiced speech. This is the only excitation method for unvoiced speech supported at present. .TP .I synt_method .IP IF .I synt_method is "psynch", pitch synchronous synthesis is performed. This is the only supported value of .I synt_method at present. .TP .I post_filt_num - vector .IP A three element vector indicating the numerator of a pole-zero post processing filter - for example {1.0, -1.0, 0.0}. .TP .I post_filt_den - vector A three element vector indicating the denominator of a pole-zero post processing filter - for example {1.0, -0.875, 0.0}. .SH SPS HEADERS .PP The following parameters are read from the header of the input ANA file: .I hd.ana\->start, hd.ana\->nan, hd.ana\->frmlen, hd.ana\->order_vcd, .I hd.ana\->order_unvcd, hd.ana\->src_sf, hd.ana\->psynch, .I hd.ana\->maxpulses, hd.ana\->maxraw, hd.ana\->maxlpc, hd.ana\->sincflag, .I hd.ana\->pre_emp. .PP .I Synt writes the usual values into the common part of the output file header. .PP .I Synt writes the following header items in the output SD file: .TP .I hd.sd\->equip .IP is set to NONE. .TP .I hd.sd\->max_value .IP is set to 0. .TP .I hd.sd\->scale .IP is set to 0. .TP .I hd.sd\->sf .IP is copied from the input header .I hd.ana\->src_sf. .TP .I hd.sd\->src_sf .IP is copied from the input header .I hd.ana\->src_sf. .TP .I hd.common\->refer .IP is copied from the .I hd.common\->refer of the input ANA file. .TP .I hd.sd\->nchan .IP is set to 1. .TP .I hd.sd\->dcrem .IP is set to 0. .TP .I hd.sd\->synt_interp .IP is determined by the value in the parameter file. .TP .I hd.sd\->synt_pwr .IP is determined by the value in the parameter file. .TP .I hd.sd\->synt_rc .IP is determined by the value in the parameter file. .TP .I hd.sd\->synt_order .IP is determined by the value in the parameter file. .TP .I hd.sd\->v_excit_method .IP is determined by the value in the parameter file. .TP .I hd.sd\->uv_excit_method .IP is determined by the value in the parameter file. .TP .I hd.sd\->synt_method is determined by the value in the parameter file. .TP .I hd.sd\->prefilter is determined by the values in the parameter file ( .I post_filt_num and .I post_filter_den ). .SH OPTIONS The following options are supported: .TP .B \-d This option should be specified if the synthesis very close to that of the dsp synthesizer needs to be performed. Otherwise, some pitch smoothing is performed by the synthesizer. .TP .BI \-h " his_file" If .I his_file is specified, .I synt lists (i) the location at which the amplitude of the synthesized speech is likely to be clipped, (ii) pulse locations at which pitch doubling is noticed, (iii) pulse locations at which some discontinuity in pulse duration estimates are noticed, and (iv) when .I synt_pwr = RAWPULSES, pulse locations at which power matching does not succeed. .TP .BI \-x " debug_level" If .I debug_level is positive, .I synt prints various information or debugging messages, on the standard error. The messages are more verbose when .I debug_level is larger. If .I debug_level is 0, no message is printed. The default is 0. .TP .BI \-P " param_file" uses the parameter file .I param_file rather than the default which is .I params. .TP .BI \-p " range" Selects a subrange of points to be synthesized, where the start and end points are defined with respect to the original SD file that is the source of the input ANA file. The range is specified using the format .I start\-end or .IR start:end . Either .I start or .I end may be omitted, in which case the omitted parameter defaults respectively to the start or end of the input ANA file. .TP .BI \-s Write the ouput file as SHORT instead of FLOAT. .SH FUTURE CHANGES .PP Modification will occur when we include silence detection in the overall algorithm. .SH SUBROUTINES CALLED: .PP extendrc, fowrdfilt, gauss, getatal, latticefilt, preemp, rand, rctoc smartsynt. .SH SEE ALSO ana (1-SPS), ptrack (1-SPS), SPS(5-SPS), ANA(5-SPS), SD(5-SPS). .SH "BUGS" .PP None known. .SH "AUTHOR" .PP S. Shankar Narayan; modified for SPS by Rodney Johnson and John Shore.
