Technique	AudioSpectrumEnvelopeType
Document	ISO/IEC WD 15938-4
Name		Melanie Jackson, Thibaut Sacreste University of Wollongong, Australia
EMail		tas48@uow.edu.au
Type		low-level audio descriptor extraction tool
External Libraries  	--
Related Ds/DSs	--
Used Ds/DSs	--
Input		Wav file
Extraction	Yes
Client Appl	NA
Summary	This component is the AudioSpectrumEnvelope descriptor extraction tool
Strong Points 	--	
Limitations	Only process '.wav' and '.au' audio files.
		The whole audio file is processed
Known Problems 	--	
Parameters	audioFile : string : name of the audio file to process 
		hopSize : string : hopsize in the mpeg7 specified format
		attributegrp : struct
			attributegrp.loEdge : float : frequency low edge
			attributegrp.hiEdge : float : frequency high edge
			attributegrp.octaveResolution : string : octave resolution in the mpeg7 specified format
		writeXML : boolean : flag for the generation of the XML file
		XMLFile (optional) : string : name of the generated XML file
		map (optional) : map from linear to log bands

Output		AudioSpectrumEnvelope : 2-D matrix : M*N matrix containing the ASE values with:
					  	 - M=number of audio frames
						 - N=number of frequency bands
		attributegrp : struct : same as input (they can be modified by the function)
		XMLFile : string : name of the generated XML file
		map (optional) : map from linear to log bands

Usage		1. run matlab
		2. change the working directory to the directory containing the function
		3. call the function 'mpeg7ASE' with the required parameters

Function call example 

>> attributegrp=struct('loEdge',62.5,'hiEdge',16000,'octaveResolution','1/8');
>> [AudioSpectrumEnvelope, attributegrp, XMLFile, map] = AudioSpectrumEnvelopeD('test.wav','PT10N1000F',attributegrp,1,'ASE.xml')