gusucode.com > 《MATLAB图像与视频处理实用案例详解》代码 > 《MATLAB图像与视频处理实用案例详解》代码/第 19 章 基于语音识别的信号灯图像模拟控制技术/voicebox/voicebox.m
function y=voicebox(f,v)
%VOICEBOX set global parameters for Voicebox functions Y=(FIELD,VAL)
%
% Inputs: F is a field name
% V is a new value for the field
%
% Outputs: Y is set equal to the structure of parameters if the
% f and v inputs are both present or both absent. If only
% input f is specified, then y is set to the value of the
% corresponding field or null if it doesn't exist.
%
% This routine contains default values for constants that are used by
% other functions in the VOICEBOX toolbox. Values in the first section below,
% entitled "System-dependent directory paths" should be set as follows:
% PP.dir_temp directory for storing temporary files
% PP.dir_data default directory to preappend to speech data file names
% when the "d" option is specified in READWAV etc.
% PP.shorten location of SHORTEN executable. SHORTEN is a proprietary file compression
% algorithm that is used for some SPHERE-format files. READSPH
% will try to call an external decoder if it is asked to
% read such a compressed file.
% PP.sfsbin location of Speech Filing Sysytem binaries. If the "c" option
% is given to READSFS, it will try to create a requested item
% if it is not present in the SFS file. This parameter tells it
% where to find the SFS executables.
% PP.sfssuffix suffix for Speech Filing Sysytem binaries. READSFS uses this paremeter
% to create the name of an SFS executable (see PP.sfsbin above).
% Other values defined in this routine are the defaults for specific algorithm constants.
% If you want to change these, please refer to the individual routines for a fuller description.
% Bugs/Suggestions
% (1) Could allow a * at the end of F to act as a wildcard and return/print a part structure
% Copyright (C) Mike Brookes 2003
% Version: $Id: voicebox.m,v 1.17 2011/07/28 06:48:45 dmb Exp $
%
% VOICEBOX is a MATLAB toolbox for speech processing.
% Home page: http://www.ee.ic.ac.uk/hp/staff/dmb/voicebox/voicebox.html
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% This program is free software; you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation; either version 2 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You can obtain a copy of the GNU General Public License from
% http://www.gnu.org/copyleft/gpl.html or by writing to
% Free Software Foundation, Inc.,675 Mass Ave, Cambridge, MA 02139, USA.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
persistent PP
if isempty(PP)
% System-dependent directory paths and constants
PP.dir_temp='F:\TEMP'; % directory for storing temporary files
PP.dir_data='E:\dmb\data\speech'; % default directory to preappend to speech data file names
PP.shorten='C:\bin\shorten.exe'; % location of shorten executable
PP.flac='C:\bin\flac.exe'; % location of flac executable
PP.sfsbin='F:\Program Files\SFS\Program'; % location of Speech Filing Sysytem binaries
PP.sfssuffix='.exe'; % suffix for Speech Filing Sysytem binaries
PP.memsize=50e6; % Maximum amount of temporary memory to use (Bytes)
% DYPSA glottal closure identifier
PP.dy_cpfrac=0.3; % presumed closed phase fraction of larynx cycle
PP.dy_cproj=0.2; % cost of projected candidate
PP.dy_cspurt=-0.45; % cost of a talkspurt
PP.dy_dopsp=1; % Use phase slope projection (1) or not (0)?
PP.dy_ewdly=0.0008; % window delay for energy cost function term [~ energy peak delay from closure] (sec)
PP.dy_ewlen=0.003; % window length for energy cost function term (sec)
PP.dy_ewtaper=0.001; % taper length for energy cost function window (sec)
PP.dy_fwlen=0.00045; % window length used to smooth group delay (sec)
PP.dy_fxmax=500; % max larynx frequency (Hz)
PP.dy_fxmin=50; % min larynx frequency (Hz)
PP.dy_fxminf=60; % min larynx frequency (Hz) [used for Frobenius norm only]
PP.dy_gwlen=0.0030; % group delay evaluation window length (sec)
PP.dy_lpcdur=0.020; % lpc analysis frame length (sec)
PP.dy_lpcn=2; % lpc additional poles
PP.dy_lpcnf=0.001; % lpc poles per Hz (1/Hz)
PP.dy_lpcstep=0.010; % lpc analysis step (sec)
PP.dy_nbest=5; % Number of NBest paths to keep
PP.dy_preemph=50; % pre-emphasis filter frequency (Hz) (to avoid preemphasis, make this very large)
PP.dy_spitch=0.2; % scale factor for pitch deviation cost
PP.dy_wener=0.3; % DP energy weighting
PP.dy_wpitch=0.5; % DP pitch weighting
PP.dy_wslope=0.1; % DP group delay slope weighting
PP.dy_wxcorr=0.8; % DP cross correlation weighting
PP.dy_xwlen=0.01; % cross-correlation length for waveform similarity (sec)
% RAPT pitch tracker
PP.rapt_f0min=50; % Min F0 (Hz)
PP.rapt_f0max=500; % Max F0 (Hz)
PP.rapt_tframe=0.01; % frame size (s)
PP.rapt_tlpw=0.005; % low pass filter window size (s)
PP.rapt_tcorw=0.0075; % correlation window size (s)
PP.rapt_candtr=0.3; % minimum peak in NCCF
PP.rapt_lagwt=0.3; % linear lag taper factor
PP.rapt_freqwt=0.02; % cost factor for F0 change
PP.rapt_vtranc=0.005; % fixed voice-state transition cost
PP.rapt_vtrac=0.5; % delta amplitude modulated transition cost
PP.rapt_vtrsc=0.5; % delta spectrum modulated transition cost
PP.rapt_vobias=0.0; % bias to encourage voiced hypotheses
PP.rapt_doublec=0.35; % cost of exact doubling or halving
PP.rapt_absnoise=0; % absolute rms noise level
PP.rapt_relnoise=2; % rms noise level relative to noise floor
PP.rapt_signoise=0.001; % ratio of peak signal rms to noise floor (0.001 = 60dB)
PP.rapt_ncands=20; % max hypotheses at each frame
PP.rapt_trms=0.03; % window length for rms measurement
PP.rapt_dtrms=0.02; % window spacing for rms measurement
PP.rapt_preemph=-7000; % s-plane position of preemphasis zero
PP.rapt_nfullag=7; % number of full lags to try (must be odd)
% now check some of the key values for validity
if exist(PP.dir_temp)~=7 % check that temp directory exists
PP.dir_temp = winenvar('temp'); % else use windows temp directory
end
[fnp,fnn,fne]=fileparts(mfilename('fullpath'));
if exist(PP.shorten)~=2 % check that shorten executable exists
PP.shorten=fullfile(fnp,'shorten.exe'); % next try local directory
if exist(PP.shorten)~=2 % check if it exists in local directory
PP.shorten='shorten.exe'; % finally assume it is on the search path
end
end
if exist(PP.flac)~=2 % check that flac executable exists
PP.flac=fullfile(fnp,'flac.exe'); % next try local directory
if exist(PP.flac)~=2 % check if it exists in local directory
PP.shorten='flac.exe'; % finally assume it is on the search path
end
end
end
if nargin==0
if nargout==0
% list all fields
nn=sort(fieldnames(PP));
cnn=char(nn);
fprintf('%d Voicebox parameters:\n',length(nn));
for i=1:length(nn);
if ischar(PP.(nn{i}))
fmt=' %s = %s\n';
else
fmt=' %s = %g\n';
end
fprintf(fmt,cnn(i,:),PP.(nn{i}));
end
else
y=PP;
end
elseif nargin==1
if isfield(PP,f)
y=PP.(f);
else
y=[];
end
else
if isfield(PP,f)
PP.(f)=v;
y=PP;
else
error(sprintf('''%s'' is not a valid voicebox field name',f));
end
end