New implementation techniques of an efficient MPEG advanced audio coder
Identifieur interne : 001D40 ( Main/Exploration ); précédent : 001D39; suivant : 001D41New implementation techniques of an efficient MPEG advanced audio coder
Auteurs : E. Kurniawati [Singapour] ; C. T. Lau ; B. Premkumar ; J. Absar ; S. GeorgeSource :
- IEEE Transactions on Consumer Electronics [ 0098-3063 ] ; 2004.
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- Pascal (Inist)
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Abstract
MPEG-AAC is the current state of the art in audio compression technology. The CD-quality promised at bit rate as low as 64 kbps makes AAC a strong candidate for high quality low bandwidth audio streaming applications over wireless network. Besides this low bit rate requirement, the codec must be able to run on personal wireless handheld devices with its inherent low power characteristics. While the AAC standard is definite enough to ensure that a valid AAC stream is correctly decodable by all AAC decoders, it is flexible enough to accommodate variations in implementation, suited to different resources available and application areas. This paper reviews various implementation techniques of the encoder. We then proposed our method of an optimized software implementation of MPEG-AAC (LC profile). The coder is able to perform encoding task using half the processing power compared to standard implementation without significant degradation in quality as shown by both subjective listening test and an ITU-R compliant quality testing program (OPERA). © 2004 IEEE.
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Absar</name></author><author><name sortKey="George, S" sort="George, S" uniqKey="George S" first="S." last="George">S. 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Kurniawati</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Computer Engineering Nanyang Technological University</s1><s2>Singapore 639798</s2><s3>SGP</s3><sZ>1 aut.</sZ></inist:fA14><country>Singapour</country><wicri:noRegion>School of Computer Engineering Nanyang Technological University</wicri:noRegion></affiliation></author><author><name sortKey="Lau, C T" sort="Lau, C T" uniqKey="Lau C" first="C. T." last="Lau">C. T. Lau</name></author><author><name sortKey="Premkumar, B" sort="Premkumar, B" uniqKey="Premkumar B" first="B." last="Premkumar">B. Premkumar</name></author><author><name sortKey="Absar, J" sort="Absar, J" uniqKey="Absar J" first="J." last="Absar">J. Absar</name></author><author><name sortKey="George, S" sort="George, S" uniqKey="George S" first="S." last="George">S. George</name></author></analytic><series><title level="j" type="main">IEEE Transactions on Consumer Electronics</title><title level="j" type="abbreviated">IEEE Trans Consum Electron</title><idno type="ISSN">0098-3063</idno><imprint><date when="2004">2004</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">IEEE Transactions on Consumer Electronics</title><title level="j" type="abbreviated">IEEE Trans Consum Electron</title><idno type="ISSN">0098-3063</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acoustic signal processing</term><term>Audio acoustics</term><term>Audio compression</term><term>Cosine transforms</term><term>Data compression</term><term>Digital audio streaming</term><term>MPEG advanced audio coder</term><term>Psychoacoustics model</term><term>Signal encoding</term><term>Sound recording</term><term>Theory</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Théorie</term><term>Acoustique audio</term><term>Traitement signal acoustique</term><term>Codage signal</term><term>Enregistrement son</term><term>Transformation cosinus</term><term>Compression donnée</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">MPEG-AAC is the current state of the art in audio compression technology. The CD-quality promised at bit rate as low as 64 kbps makes AAC a strong candidate for high quality low bandwidth audio streaming applications over wireless network. Besides this low bit rate requirement, the codec must be able to run on personal wireless handheld devices with its inherent low power characteristics. While the AAC standard is definite enough to ensure that a valid AAC stream is correctly decodable by all AAC decoders, it is flexible enough to accommodate variations in implementation, suited to different resources available and application areas. This paper reviews various implementation techniques of the encoder. We then proposed our method of an optimized software implementation of MPEG-AAC (LC profile). The coder is able to perform encoding task using half the processing power compared to standard implementation without significant degradation in quality as shown by both subjective listening test and an ITU-R compliant quality testing program (OPERA). © 2004 IEEE.</div></front></TEI><affiliations><list><country><li>Singapour</li></country></list><tree><noCountry><name sortKey="Absar, J" sort="Absar, J" uniqKey="Absar J" first="J." last="Absar">J. Absar</name><name sortKey="George, S" sort="George, S" uniqKey="George S" first="S." last="George">S. George</name><name sortKey="Lau, C T" sort="Lau, C T" uniqKey="Lau C" first="C. T." last="Lau">C. T. Lau</name><name sortKey="Premkumar, B" sort="Premkumar, B" uniqKey="Premkumar B" first="B." last="Premkumar">B. Premkumar</name></noCountry><country name="Singapour"><noRegion><name sortKey="Kurniawati, E" sort="Kurniawati, E" uniqKey="Kurniawati E" first="E." last="Kurniawati">E. 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