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Introduction

by Holger Crysandt

This java library provides a MPEG-7 audio encoder to describe an audio content (in this case: an audio file) with some descriptors of the MPEG-7 standard.

It was initially developed at the Institute of Communications Engineering at Aachen University (RWTH) - Germany and extended at the Università Politecnica delle Marche - Ancona - Italy. The software is published under the LGPL (GNU Lesser General Public License). Its binaries and sources are hosted by Sourceforge.net.

Features

Currently the encoder extracts the following descriptors and description schemes:

Low Level Descriptors

AudioPowerType
AudioWaveform
AudioSpectrumCentroid/-Spread
AudioSpectrumEnvelope
AudioSpectrumFlatness
AudioSpectrumBasis/-Projection
AudioFundamentalFrequency
AudioHarmonicity

LogAttackTime
HarmonicSpectralCentroid
HarmonicSpectralDeviation
HarmonicSpectralSpread
HarmonicSpectralVariation

SpectralCentroid
TemporalCentroid

DigitalClip
DigitalZero
SampleHold
Click
BackgroundNoiseLevel
DcOffset
BandWidth

Description Schema

AudioSignature
SoundModel

More descriptors and description schemes are under construction and might follow in the future. If you want to help us extending the encoder fell free to contact me or/and join us at http://sourceforge.net/projects/mpeg7audioenc

Requirements

To run the program Java2, Version 1.3 is required. Other programs or libraries are not necessary. Due to performance version 1.4 or later is highly recommended. It can be downloaded at http://java.sun.com. To get the version of your java installation just type:

java -version

Last updated: 2009-06-13