view aim-mat/tools/@signal/erb2log.m @ 4:537f939baef0 tip

various bug fixes and changed copyright message

% method of class @signal
% function sig=erb2log(sig,cfs)
%
% changes the signal (that is ususally a function of frequencies, into
% another signal with frequencies, but now the spacing is according to the
% cf list in cfs. All points are interpolated
%
%   INPUT VALUES:
%       sig: original @signal
%       cfs: list of frequencies
% 
%   RETURN VALUE:
%       sig: new @signal
%
% This external file is included as part of the 'aim-mat' distribution package
% (c) 2011, University of Southampton
% Maintained by Stefan Bleeck ([e-mail])
% download of current version is on the soundsoftware site: 
% http://code.soundsoftware.ac.uk/projects/aimmat
% documentation and everything is on http://www.acousticscale.org


function sig=erb2log(sig,cfs)


min_fre=cfs(1);
max_fre=cfs(end);
nr_points=length(cfs);

log_fres=distributelogarithmic(min_fre,max_fre,nr_points);

erb_fres=cfs;
erb_vals=sig.werte;

method='cubic';
% for i=1:nr_points
%     log_fre=log_fres(i);
new_vals=interp1(erb_fres,erb_vals,log_fres,method);


% end

sig=setvalues(sig,new_vals);

a=0;