BR112021017197A2 - Mixador de redução e método de mixagem de redução - Google Patents

Mixador de redução e método de mixagem de redução

Info

Publication number
BR112021017197A2
BR112021017197A2 BR112021017197A BR112021017197A BR112021017197A2 BR 112021017197 A2 BR112021017197 A2 BR 112021017197A2 BR 112021017197 A BR112021017197 A BR 112021017197A BR 112021017197 A BR112021017197 A BR 112021017197A BR 112021017197 A2 BR112021017197 A2 BR 112021017197A2
Authority
BR
Brazil
Prior art keywords
reduction
channels
mixer
mixing method
representations
Prior art date
Application number
BR112021017197A
Other languages
English (en)
Inventor
Bernd Edler
Eleni Fotopoulou
Franz Reutelhuber
Markus Multrus
Pallavi Maben
Sascha Disch
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 BR112021017197A2 publication Critical patent/BR112021017197A2/pt

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
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
    • 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
    • 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
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/087—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters using mixed excitation models, e.g. MELP, MBE, split band LPC or HVXC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/02—Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
    • 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
    • G10L19/0212—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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/165—Equalizers; Volume or gain control in limited frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/03—Aspects of down-mixing multi-channel audio to configurations with lower numbers of playback channels, e.g. 7.1 -> 5.1

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Mathematical Physics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Stereophonic System (AREA)
  • Complex Calculations (AREA)
  • Superheterodyne Receivers (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

mixador de redução e método de mixagem de redução. um mixador de redução para mixagem de redução de um sinal de multicanais que tem pelo menos dois canais compreende: um estimador de valor de ponderação (100) para estimar valores de ponderação em banda para os pelo menos dois canais; um ponderador espectral (200) para ponderar as representações de domínio espectral dentre os pelo menos dois canais usando os valores de ponderação em banda; um conversor (300) para converter representações de domínio espectral ponderado dentre os pelo menos dois canais em representações de tempo dentre os pelo menos dois canais; e um mixador (400) para mixar as representações de tempo dos pelo menos dois canais para obter um sinal de mixagem de redução.
BR112021017197A 2019-03-06 2020-03-04 Mixador de redução e método de mixagem de redução BR112021017197A2 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19161076 2019-03-06
PCT/EP2020/055669 WO2020178321A1 (en) 2019-03-06 2020-03-04 Downmixer and method of downmixing

Publications (1)

Publication Number Publication Date
BR112021017197A2 true BR112021017197A2 (pt) 2021-11-09

Family

ID=65801834

Family Applications (1)

Application Number Title Priority Date Filing Date
BR112021017197A BR112021017197A2 (pt) 2019-03-06 2020-03-04 Mixador de redução e método de mixagem de redução

Country Status (13)

Country Link
US (1) US20210375293A1 (pt)
EP (1) EP3935630A1 (pt)
JP (3) JP7416816B2 (pt)
KR (1) KR20210137121A (pt)
CN (1) CN113544774A (pt)
AU (2) AU2020233210B2 (pt)
BR (1) BR112021017197A2 (pt)
CA (1) CA3132404A1 (pt)
MX (1) MX2021010570A (pt)
SG (1) SG11202108895TA (pt)
TW (2) TWI760705B (pt)
WO (2) WO2020178321A1 (pt)
ZA (1) ZA202107327B (pt)

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7343281B2 (en) * 2003-03-17 2008-03-11 Koninklijke Philips Electronics N.V. Processing of multi-channel signals
US7447317B2 (en) * 2003-10-02 2008-11-04 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V Compatible multi-channel coding/decoding by weighting the downmix channel
ATE430360T1 (de) * 2004-03-01 2009-05-15 Dolby Lab Licensing Corp Mehrkanalige audiodekodierung
ATE435480T1 (de) * 2006-10-25 2009-07-15 Fraunhofer Ges Forschung Vorrichtung und verfahren zur erzeugung von audio-subband-werten und vorrichtung und verfahren zur erzeugung von zeit-domänen-audio-beispielen
KR20080076691A (ko) * 2007-02-14 2008-08-20 엘지전자 주식회사 멀티채널 오디오신호 복호화방법 및 그 장치, 부호화방법및 그 장치
JP5058844B2 (ja) 2008-02-18 2012-10-24 シャープ株式会社 音声信号変換装置、音声信号変換方法、制御プログラム、および、コンピュータ読み取り可能な記録媒体
RU2495503C2 (ru) * 2008-07-29 2013-10-10 Панасоник Корпорэйшн Устройство кодирования звука, устройство декодирования звука, устройство кодирования и декодирования звука и система проведения телеконференций
DE102008056704B4 (de) 2008-11-11 2010-11-04 Institut für Rundfunktechnik GmbH Verfahren zum Erzeugen eines abwärtskompatiblen Tonformates
EP2237266A1 (en) * 2009-04-03 2010-10-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for determining a plurality of local center of gravity frequencies of a spectrum of an audio signal
EP2323130A1 (en) * 2009-11-12 2011-05-18 Koninklijke Philips Electronics N.V. Parametric encoding and decoding
KR101756838B1 (ko) * 2010-10-13 2017-07-11 삼성전자주식회사 다채널 오디오 신호를 다운 믹스하는 방법 및 장치
US9697840B2 (en) * 2011-11-30 2017-07-04 Dolby International Ab Enhanced chroma extraction from an audio codec
JP2015525374A (ja) * 2012-06-04 2015-09-03 サムスン エレクトロニクス カンパニー リミテッド オーディオ符号化方法及びその装置、オーディオ復号化方法及びその装置、並びにそれを採用するマルチメディア機器
TWI618051B (zh) * 2013-02-14 2018-03-11 杜比實驗室特許公司 用於利用估計之空間參數的音頻訊號增強的音頻訊號處理方法及裝置
CN106797523B (zh) * 2014-08-01 2020-06-19 史蒂文·杰伊·博尼 音频设备
US10217467B2 (en) * 2016-06-20 2019-02-26 Qualcomm Incorporated Encoding and decoding of interchannel phase differences between audio signals
KR102291792B1 (ko) 2016-11-08 2021-08-20 프라운호퍼-게젤샤프트 추르 푀르데룽 데어 안제반텐 포르슝 에 파우 적어도 2개의 채널들을 다운믹싱하기 위한 다운믹서 및 방법 및 멀티채널 인코더 및 멀티채널 디코더
PT3539125T (pt) 2016-11-08 2023-01-27 Fraunhofer Ges Forschung Aparelho e método para codificar ou descodificar um sinal multicanal utilizando um ganho side e um ganho residual
JP2017058696A (ja) * 2016-12-09 2017-03-23 ホアウェイ・テクノロジーズ・カンパニー・リミテッド インターチャネル差分推定方法及び空間オーディオ符号化装置
GB2561596A (en) * 2017-04-20 2018-10-24 Nokia Technologies Oy Audio signal generation for spatial audio mixing

Also Published As

Publication number Publication date
KR20210137121A (ko) 2021-11-17
JP7416816B2 (ja) 2024-01-17
WO2020178322A1 (en) 2020-09-10
WO2020178321A1 (en) 2020-09-10
TW202042214A (zh) 2020-11-16
TWI760705B (zh) 2022-04-11
JP2024001324A (ja) 2024-01-09
JP2022522706A (ja) 2022-04-20
AU2023258388A1 (en) 2023-11-23
TW202101427A (zh) 2021-01-01
ZA202107327B (en) 2022-08-31
CN113544774A (zh) 2021-10-22
SG11202108895TA (en) 2021-09-29
AU2020233210A1 (en) 2021-11-04
US20210375293A1 (en) 2021-12-02
AU2020233210B2 (en) 2023-09-28
JP2024001325A (ja) 2024-01-09
MX2021010570A (es) 2021-10-13
EP3935630A1 (en) 2022-01-12
CA3132404A1 (en) 2020-09-10

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