HK1077391A1 - Device and method for coding and decoding audio signal - Google Patents

Device and method for coding and decoding audio signal

Info

Publication number
HK1077391A1
HK1077391A1 HK05109316A HK05109316A HK1077391A1 HK 1077391 A1 HK1077391 A1 HK 1077391A1 HK 05109316 A HK05109316 A HK 05109316A HK 05109316 A HK05109316 A HK 05109316A HK 1077391 A1 HK1077391 A1 HK 1077391A1
Authority
HK
Hong Kong
Prior art keywords
audio signal
quantization block
whole
loss
spectral values
Prior art date
Application number
HK05109316A
Inventor
Ralf Geiger
Thomas Sporer
Karlheinz Brandenburg
Jurgen Herre
Jurgen Koller
Joachim Deguara
Original Assignee
Fraunhofer Ges Forschung
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Publication of HK1077391A1 publication Critical patent/HK1077391A1/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/0212—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders using orthogonal transformation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/0017—Lossless audio signal coding; Perfect reconstruction of coded audio signal by transmission of coding error
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/032—Quantisation or dequantisation of spectral components

Abstract

According to the invention, a time-discrete audio signal is processed (52) in order to provide a quantization block with quantized spectral values (52). In addition, a whole-number spectral representation is generated from a time-discrete audio signal, using a whole-number transformation algorithm (56). The quantization block, which has been generated using a psychoacoustic model (54), is inverse quantized and rounded (58) to form a differential between the whole-number spectral values and the inverse quantized rounded spectral values. The quantization block alone produces a psychoacoustic encoded/decoded audio signal affected by loss after the decoding process, whereas the quantization block together with the combination block provides a loss-free, or practically loss-free encoded and decoded audio signal during said decoding process. The generation of the differential signal in the frequency range allows a simpler encoder/decoder structure to be produced.
HK05109316A 2002-04-18 2005-10-20 Device and method for coding and decoding audio signal HK1077391A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10217297A DE10217297A1 (en) 2002-04-18 2002-04-18 Device and method for coding a discrete-time audio signal and device and method for decoding coded audio data
PCT/EP2002/013623 WO2003088212A1 (en) 2002-04-18 2002-12-02 Device and method for encoding a time-discrete audio signal and device and method for decoding coded audio data

Publications (1)

Publication Number Publication Date
HK1077391A1 true HK1077391A1 (en) 2006-02-10

Family

ID=28798541

Family Applications (1)

Application Number Title Priority Date Filing Date
HK05109316A HK1077391A1 (en) 2002-04-18 2005-10-20 Device and method for coding and decoding audio signal

Country Status (9)

Country Link
EP (1) EP1495464B1 (en)
JP (1) JP4081447B2 (en)
KR (1) KR100892152B1 (en)
CN (1) CN1258172C (en)
AT (1) ATE305655T1 (en)
CA (1) CA2482427C (en)
DE (2) DE10217297A1 (en)
HK (1) HK1077391A1 (en)
WO (1) WO2003088212A1 (en)

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CN103594090B (en) * 2007-08-27 2017-10-10 爱立信电话股份有限公司 Low complexity spectrum analysis/synthesis that use time resolution ratio can be selected
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EP2144230A1 (en) 2008-07-11 2010-01-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Low bitrate audio encoding/decoding scheme having cascaded switches
KR101403115B1 (en) * 2008-10-08 2014-06-27 보이세지 코포레이션 Multi-resolution switched audio encoding/decoding method and appratus
CN102918590B (en) * 2010-03-31 2014-12-10 韩国电子通信研究院 Encoding method and device, and decoding method and device
US8924222B2 (en) 2010-07-30 2014-12-30 Qualcomm Incorporated Systems, methods, apparatus, and computer-readable media for coding of harmonic signals
US9208792B2 (en) 2010-08-17 2015-12-08 Qualcomm Incorporated Systems, methods, apparatus, and computer-readable media for noise injection
JP5799707B2 (en) * 2011-09-26 2015-10-28 ソニー株式会社 Audio encoding apparatus, audio encoding method, audio decoding apparatus, audio decoding method, and program
EP2830058A1 (en) 2013-07-22 2015-01-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Frequency-domain audio coding supporting transform length switching
CN105632503B (en) * 2014-10-28 2019-09-03 南宁富桂精密工业有限公司 Information concealing method and system
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Also Published As

Publication number Publication date
ATE305655T1 (en) 2005-10-15
KR100892152B1 (en) 2009-04-10
DE10217297A1 (en) 2003-11-06
EP1495464B1 (en) 2005-09-28
DE50204426D1 (en) 2005-11-03
AU2002358578A1 (en) 2003-10-27
EP1495464A1 (en) 2005-01-12
CN1258172C (en) 2006-05-31
WO2003088212A1 (en) 2003-10-23
CN1625768A (en) 2005-06-08
CA2482427A1 (en) 2003-10-23
JP2005527851A (en) 2005-09-15
CA2482427C (en) 2010-01-19
JP4081447B2 (en) 2008-04-23
KR20050007312A (en) 2005-01-17

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