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New implementation techniques of an efficient MPEG advanced audio coder

Identifieur interne : 000188 ( PascalFrancis/Curation ); précédent : 000187; suivant : 000189

New implementation techniques of an efficient MPEG advanced audio coder

Auteurs : E. Kurniawati [Singapour] ; C. T. Lau ; B. Premkumar ; J. Absar ; S. George

Source :

RBID : Pascal:04-0438470

Descripteurs français

English descriptors

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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A08 01  1  ENG  @1 New implementation techniques of an efficient MPEG advanced audio coder
A11 01  1    @1 KURNIAWATI (E.)
A11 02  1    @1 LAU (C. T.)
A11 03  1    @1 PREMKUMAR (B.)
A11 04  1    @1 ABSAR (J.)
A11 05  1    @1 GEORGE (S.)
A14 01      @1 School of Computer Engineering Nanyang Technological University @2 Singapore 639798 @3 SGP @Z 1 aut.
A20       @1 655-665
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A23 01      @0 ENG
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C01 01    ENG  @0 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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C02 05  X    @0 001A02E
C03 01  1  ENG  @0 Audio compression @4 INC
C03 02  1  ENG  @0 Digital audio streaming @4 INC
C03 03  1  ENG  @0 Psychoacoustics model @4 INC
C03 04  1  ENG  @0 MPEG advanced audio coder @4 INC
C03 05  1  FRE  @0 Théorie
C03 05  1  ENG  @0 Theory
C03 06  1  FRE  @0 Acoustique audio
C03 06  1  ENG  @0 Audio acoustics
C03 07  1  FRE  @0 Traitement signal acoustique
C03 07  1  ENG  @0 Acoustic signal processing
C03 08  1  FRE  @0 Codage signal
C03 08  1  ENG  @0 Signal encoding
C03 09  1  FRE  @0 Enregistrement son
C03 09  1  ENG  @0 Sound recording
C03 10  1  FRE  @0 Transformation cosinus
C03 10  1  ENG  @0 Cosine transforms
C03 11  1  FRE  @0 Compression donnée @3 P
C03 11  1  ENG  @0 Data compression @3 P
N21       @1 250

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Pascal:04-0438470

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