NO20064093L - Audiokoding - Google Patents

Audiokoding

Info

Publication number
NO20064093L
NO20064093L NO20064093A NO20064093A NO20064093L NO 20064093 L NO20064093 L NO 20064093L NO 20064093 A NO20064093 A NO 20064093A NO 20064093 A NO20064093 A NO 20064093A NO 20064093 L NO20064093 L NO 20064093L
Authority
NO
Norway
Prior art keywords
power limit
interpolating
decoder side
masking threshold
gain value
Prior art date
Application number
NO20064093A
Other languages
English (en)
Other versions
NO338918B1 (no
Inventor
Gerald Schuller
Stefan Wabnik
Marc Gayer
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 NO20064093L publication Critical patent/NO20064093L/no
Publication of NO338918B1 publication Critical patent/NO338918B1/no

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L19/04—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 predictive techniques
    • G10L19/26—Pre-filtering or post-filtering
    • G10L19/265—Pre-filtering, e.g. high frequency emphasis prior to encoding
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Cereal-Derived Products (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

Den sentrale ide ved oppfinnelsen er at den tidligere fremgangsmåte, nemlig interpolering i forhold til filterkoeffisienter og forsterkningsverdien for å oppnå interpolerte verdier for mellomaudioverdiene som starter fra nodene, må forkastes. Koding som inneholder mindre hørbare forekomster kan oppnås ved ikke å interpolere forsterkningsverdien, men snarere ta kraftgrensen avledet fra maskeringsterskelen, fortrinnsvis som området under kvadratet av størrelsen av maskeringsterskelen for hver node, dvs. for hver parameterisering som skal overføres og deretter utføre interpolering mellom disse effektgrenser for nærliggende noder, feks. en lineær interpolering. Både på koder- og dekodersiden kan en forsterkningsverdi deretter beregnes fra mellomeffektgrensen bestemt slik at kvantiseringsstøy forårsaket av kvantiseringen som har en konstant frekvens før postfiltrering på dekodersiden, er under effektgrensen eller tilsvarende denne etter postfiltrering.
NO20064093A 2004-02-13 2006-09-12 Audio-koding NO338918B1 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004007200A DE102004007200B3 (de) 2004-02-13 2004-02-13 Audiocodierung
PCT/EP2005/001350 WO2005078704A1 (de) 2004-02-13 2005-02-10 Audiocodierung

Publications (2)

Publication Number Publication Date
NO20064093L true NO20064093L (no) 2006-10-26
NO338918B1 NO338918B1 (no) 2016-10-31

Family

ID=34745238

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20064093A NO338918B1 (no) 2004-02-13 2006-09-12 Audio-koding

Country Status (15)

Country Link
US (1) US7729903B2 (no)
EP (1) EP1687808B1 (no)
JP (1) JP4444296B2 (no)
KR (1) KR100814673B1 (no)
CN (1) CN1918632B (no)
AT (1) ATE383641T1 (no)
AU (1) AU2005213768B2 (no)
BR (1) BRPI0506623B1 (no)
CA (1) CA2556099C (no)
DE (2) DE102004007200B3 (no)
ES (1) ES2300975T3 (no)
IL (1) IL176857A0 (no)
NO (1) NO338918B1 (no)
RU (1) RU2335809C2 (no)
WO (1) WO2005078704A1 (no)

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EP4372744B1 (en) 2008-07-11 2025-04-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for audio decoding and corresponding computer program
PL4376306T3 (pl) 2008-07-11 2025-04-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Enkoder audio oraz dekoder audio
RU2591663C2 (ru) 2009-10-20 2016-07-20 Фраунхофер-Гезелльшафт цур Фёрдерунг дер ангевандтен Форшунг Е.Ф. Аудио кодер, аудио декодер, способ кодирования аудио информации, способ декодирования аудио информации и компьютерная программа, использующая обнаружение группы ранее декодированных спектральных значений
BR122021008576B1 (pt) 2010-01-12 2022-04-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V Codificador de áudio, decodificador de áudio, método de codificação e informação de áudio, e método de decodificação de uma informação de áudio que utiliza uma tabela hash que descreve tanto valores de estado significativos como limites de intervalo
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ES2715191T3 (es) 2011-02-14 2019-06-03 Fraunhofer Ges Forschung Codificación y decodificación de posiciones de impulso de pistas de una señal de audio
JP5712288B2 (ja) * 2011-02-14 2015-05-07 フラウンホーファー−ゲゼルシャフト・ツール・フェルデルング・デル・アンゲヴァンテン・フォルシュング・アインゲトラーゲネル・フェライン 重複変換を使用した情報信号表記
ES2529025T3 (es) 2011-02-14 2015-02-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Aparato y método para procesar una señal de audio decodificada en un dominio espectral
AR085218A1 (es) * 2011-02-14 2013-09-18 Fraunhofer Ges Forschung Aparato y metodo para ocultamiento de error en voz unificada con bajo retardo y codificacion de audio
MX2013009304A (es) 2011-02-14 2013-10-03 Fraunhofer Ges Forschung Aparato y metodo para codificar una porcion de una señal de audio utilizando deteccion de un transiente y resultado de calidad.
CN110517700B (zh) 2013-01-29 2023-06-09 弗劳恩霍夫应用研究促进协会 用于选择第一编码算法与第二编码算法中的一个的装置
US9060223B2 (en) 2013-03-07 2015-06-16 Aphex, Llc Method and circuitry for processing audio signals
BR112015025022B1 (pt) 2013-04-05 2022-03-29 Dolby International Ab Método de decodificação, decodificador em um sistema de processamento de áudio, método de codificação, e codificador em um sistema de processamento de áudio
EP2830064A1 (en) 2013-07-22 2015-01-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for decoding and encoding an audio signal using adaptive spectral tile selection
US9277421B1 (en) * 2013-12-03 2016-03-01 Marvell International Ltd. System and method for estimating noise in a wireless signal using order statistics in the time domain
CN105096957B (zh) 2014-04-29 2016-09-14 华为技术有限公司 处理信号的方法及设备
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Also Published As

Publication number Publication date
CA2556099C (en) 2010-06-01
IL176857A0 (en) 2006-10-31
NO338918B1 (no) 2016-10-31
RU2006132734A (ru) 2008-03-20
AU2005213768B2 (en) 2009-11-19
BRPI0506623A (pt) 2007-05-02
JP2007522510A (ja) 2007-08-09
BRPI0506623B1 (pt) 2018-12-18
DE502005002489D1 (de) 2008-02-21
CN1918632B (zh) 2010-05-05
RU2335809C2 (ru) 2008-10-10
DE102004007200B3 (de) 2005-08-11
ES2300975T3 (es) 2008-06-16
CN1918632A (zh) 2007-02-21
AU2005213768A1 (en) 2005-08-25
EP1687808A1 (de) 2006-08-09
US7729903B2 (en) 2010-06-01
KR20060113998A (ko) 2006-11-03
ATE383641T1 (de) 2008-01-15
CA2556099A1 (en) 2005-08-25
EP1687808B1 (de) 2008-01-09
JP4444296B2 (ja) 2010-03-31
KR100814673B1 (ko) 2008-03-18
WO2005078704A1 (de) 2005-08-25
US20070016403A1 (en) 2007-01-18

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