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v_resample

PURPOSE ^

V_RESAMPLE Resample and remove end transients [y,h]=(x,p,q,n,b)

SYNOPSIS ^

function [y,h]=v_resample(x,p,q,n,b)

DESCRIPTION ^

V_RESAMPLE Resample and remove end transients [y,h]=(x,p,q,n,b)

 This multiplies the sample rate of x by p/q. It is identical to resample()
 except that the initial and final filter transients are removed.
 The number of ouput samples will be length(x)*ceil(p/q) - 2*ceil(n*max(p/q,1))
 where the filter length n has a default value of 10.

 Inputs:  x    input signal (or multiple signals with one per column)
          p,q  sampling rate is multiplied by p/q (p and q must be +ve integers)
          n    length of filter [default: 10]
          b    Kaiser window parameter beta [default: 5]

 Outputs: y    resampled output signal
          h    filter used (at a rate of p times the input sample rate)

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 function [y,h]=v_resample(x,p,q,n,b)
0002 %V_RESAMPLE Resample and remove end transients [y,h]=(x,p,q,n,b)
0003 %
0004 % This multiplies the sample rate of x by p/q. It is identical to resample()
0005 % except that the initial and final filter transients are removed.
0006 % The number of ouput samples will be length(x)*ceil(p/q) - 2*ceil(n*max(p/q,1))
0007 % where the filter length n has a default value of 10.
0008 %
0009 % Inputs:  x    input signal (or multiple signals with one per column)
0010 %          p,q  sampling rate is multiplied by p/q (p and q must be +ve integers)
0011 %          n    length of filter [default: 10]
0012 %          b    Kaiser window parameter beta [default: 5]
0013 %
0014 % Outputs: y    resampled output signal
0015 %          h    filter used (at a rate of p times the input sample rate)
0016 
0017 %      Copyright (C) Mike Brookes 2014
0018 %      Version: $Id: v_resample.m 5119 2014-09-11 07:22:12Z dmb $
0019 %
0020 %   VOICEBOX is a MATLAB toolbox for speech processing.
0021 %   Home page: http://www.ee.ic.ac.uk/hp/staff/dmb/voicebox/voicebox.html
0022 %
0023 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0024 %   This program is free software; you can redistribute it and/or modify
0025 %   it under the terms of the GNU General Public License as published by
0026 %   the Free Software Foundation; either version 2 of the License, or
0027 %   (at your option) any later version.
0028 %
0029 %   This program is distributed in the hope that it will be useful,
0030 %   but WITHOUT ANY WARRANTY; without even the implied warranty of
0031 %   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
0032 %   GNU General Public License for more details.
0033 %
0034 %   You can obtain a copy of the GNU General Public License from
0035 %   http://www.gnu.org/copyleft/gpl.html or by writing to
0036 %   Free Software Foundation, Inc.,675 Mass Ave, Cambridge, MA 02139, USA.
0037 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0038 if p==q
0039     y=x;
0040     h=1;
0041 else
0042     if nargin < 5,  b = 5;  end   % design parameter for Kaiser window LPF
0043     if nargin < 4,   n = 10;   end
0044     [y,h]=resample(x,p,q,n,b);
0045     m=ceil(n*max(p/q,1));
0046     if size(x,1)==1 % x is a row vector
0047         y=y(m+1:end-m);
0048     else
0049         y=y(m+1:end-m,:);
0050     end
0051 end

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