% AudioSpectrumBasisType - basis components of a spectrum matrix
%                         computes basis functions and projection coefficients.
%
% [V,delta]=AudioSpectrumBasis(X, k, DDL_FLAG)
%
% Inputs:
% X - spectrum data matrix ( t x n, t=time points, n=spectral channels)
% k - number of components to extract
% DDL_FLAG - 1=write XML output. [0]
%
% Outputs
% V - n x k matrix of basis functions
% delta - k singular values of V

% Copyright, 1997-2002 Michael A. Casey, MIT Media Lab, MERL
% All Rights Reserved


Technique	AudioSpectrumBasisType
Document	ISO/IEC WD 15938-4
Name		Michael Casey
EMail		mkc@media.mit.edu
Type		low-level audio descriptor extraction tool
External Libraries 	--
Related Ds/DSs	AudioSpectrumProjectionD, SoundModelDS, SoundClassificationModelDS
Used Ds/DSs	audioSpectrumAttributeGroup
Input		Wav file
Extraction	Yes
Client Appl	NA
Summary		Extract a set of basis functions from a list of wav files 
Strong Points 	--