BRPI0412717A - métodos para codificar um sinal e para decodificar um fluxo de áudio, codoficador de áudio, reprodutor de áudio, sistema de áudio, fluxo de áudio, e, meio de armazenagem - Google Patents

métodos para codificar um sinal e para decodificar um fluxo de áudio, codoficador de áudio, reprodutor de áudio, sistema de áudio, fluxo de áudio, e, meio de armazenagem

Info

Publication number
BRPI0412717A
BRPI0412717A BRPI0412717-0A BRPI0412717A BRPI0412717A BR PI0412717 A BRPI0412717 A BR PI0412717A BR PI0412717 A BRPI0412717 A BR PI0412717A BR PI0412717 A BRPI0412717 A BR PI0412717A
Authority
BR
Brazil
Prior art keywords
audio
stream
quantised
decoding
encoding
Prior art date
Application number
BRPI0412717-0A
Other languages
English (en)
Inventor
Andreas J Gerrits
Albertus C Den Brinker
Original Assignee
Koninkl Philips Electronics Nv
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 Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Publication of BRPI0412717A publication Critical patent/BRPI0412717A/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
    • G10L19/02—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
    • G10L19/093—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters using sinusoidal excitation models

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

"MéTODOS PARA CODIFICAR UM SINAL E PARA DECODIFICAR UM FLUXO DE áUDIO, CODIFICADOR DE áUDIO, REPRODUTOR DE áUDIO, SISTEMA DE áUDIO, FLUXO DE áUDIO, E, MEIO DE ARMAZENAGEM". Em um codificador de áudio senoidal, é estimado um número de senóides por segmento de áudio. Uma senóide é representada por freqüência, amplitude e fase. Normalmente, a fase é quantitizada independente da freqüência. A invenção usa uma quantitização de fase dependente da freqüência e, em particular as freqüências baixa são quantitizadas usando intervalos de quantitização menores do que em freqüências mais altas. Então, as fases 'desempacotadas' das freqüências mais baixas são quantitizadas mais precisamente, possivelmente com uma banda de quantização menor do que as fases das freqüências mais altas. A invenção acarreta uma melhoria significativa na qualidade de sinal decodificado, especialmente para quantitizadores de baixa taxa de bit.
BRPI0412717-0A 2003-07-18 2004-07-08 métodos para codificar um sinal e para decodificar um fluxo de áudio, codoficador de áudio, reprodutor de áudio, sistema de áudio, fluxo de áudio, e, meio de armazenagem BRPI0412717A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP03102225 2003-07-18
PCT/IB2004/051172 WO2005008628A1 (en) 2003-07-18 2004-07-08 Low bit-rate audio encoding

Publications (1)

Publication Number Publication Date
BRPI0412717A true BRPI0412717A (pt) 2006-09-26

Family

ID=34072659

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0412717-0A BRPI0412717A (pt) 2003-07-18 2004-07-08 métodos para codificar um sinal e para decodificar um fluxo de áudio, codoficador de áudio, reprodutor de áudio, sistema de áudio, fluxo de áudio, e, meio de armazenagem

Country Status (11)

Country Link
US (1) US7640156B2 (pt)
EP (1) EP1649453B1 (pt)
JP (1) JP4782006B2 (pt)
KR (1) KR101058064B1 (pt)
CN (1) CN1826634B (pt)
AT (1) ATE425533T1 (pt)
BR (1) BRPI0412717A (pt)
DE (1) DE602004019928D1 (pt)
ES (1) ES2322264T3 (pt)
RU (1) RU2368018C2 (pt)
WO (1) WO2005008628A1 (pt)

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KR101410229B1 (ko) * 2007-08-20 2014-06-23 삼성전자주식회사 오디오 신호의 연속 정현파 신호 정보를 인코딩하는 방법및 장치와 디코딩 방법 및 장치
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CN105765655A (zh) * 2013-11-22 2016-07-13 高通股份有限公司 高频带译码中的选择性相位补偿
PL232466B1 (pl) 2015-01-19 2019-06-28 Zylia Spolka Z Ograniczona Odpowiedzialnoscia Sposób kodowania, sposób dekodowania, koder oraz dekoder sygnału audio
CN107924683B (zh) * 2015-10-15 2021-03-30 华为技术有限公司 正弦编码和解码的方法和装置
EP3483886A1 (en) * 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Selecting pitch lag
US10957331B2 (en) 2018-12-17 2021-03-23 Microsoft Technology Licensing, Llc Phase reconstruction in a speech decoder
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CN114424282B (zh) * 2019-09-03 2026-03-24 杜比实验室特许公司 低时延低频率效应编译码器
CN114627882B (zh) * 2022-04-12 2025-06-06 腾讯音乐娱乐科技（深圳）有限公司 音频处理方法、电子设备及计算机可读存储介质
CN116993799A (zh) * 2023-04-17 2023-11-03 中国科学院长春光学精密机械与物理研究所 一种相位展开误差校正方法、系统及终端

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Also Published As

Publication number Publication date
WO2005008628A1 (en) 2005-01-27
RU2006105017A (ru) 2006-06-27
RU2368018C2 (ru) 2009-09-20
EP1649453B1 (en) 2009-03-11
EP1649453A1 (en) 2006-04-26
US7640156B2 (en) 2009-12-29
US20070112560A1 (en) 2007-05-17
ES2322264T3 (es) 2009-06-18
DE602004019928D1 (de) 2009-04-23
CN1826634B (zh) 2010-12-01
CN1826634A (zh) 2006-08-30
JP4782006B2 (ja) 2011-09-28
KR101058064B1 (ko) 2011-08-22
JP2007519027A (ja) 2007-07-12
ATE425533T1 (de) 2009-03-15
KR20060037375A (ko) 2006-05-03

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B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

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B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2259 DE 22/04/2014.