BR9813863A - Codificação de áudio baseada em quadro com banco de filtros adicional para suprimir artefatos de desalinhamento em limites de quadro - Google Patents

Codificação de áudio baseada em quadro com banco de filtros adicional para suprimir artefatos de desalinhamento em limites de quadro

Info

Publication number
BR9813863A
BR9813863A BR9813863-4A BR9813863A BR9813863A BR 9813863 A BR9813863 A BR 9813863A BR 9813863 A BR9813863 A BR 9813863A BR 9813863 A BR9813863 A BR 9813863A
Authority
BR
Brazil
Prior art keywords
audio
splice
information
frame
technique
Prior art date
Application number
BR9813863-4A
Other languages
English (en)
Inventor
Louis Dunn Fielder
Original Assignee
Dolby Lab Licensing Corp
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 Dolby Lab Licensing Corp filed Critical Dolby Lab Licensing Corp
Publication of BR9813863A publication Critical patent/BR9813863A/pt

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • 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
    • 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
    • G10L19/0204—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 subband decomposition
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0248—Filters characterised by a particular frequency response or filtering method
    • H03H17/0264—Filter sets with mutual related characteristics
    • H03H17/0266—Filter banks
    • 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
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/18—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being spectral information of each sub-band

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Computational Linguistics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Television Signal Processing For Recording (AREA)
  • Communication Control (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

Patente de Invenção: <B>"CODIFICAçãO DE áUDIO BASEADA EM QUADRO COM BANCO DE FILTROS ADICIONAL PARA SUPRIMIR ARTEFATOS DE DESALINHAMENTO EM LIMITES DE QUADRO". Diversas técnicas de processamento de sinais de áudio podem ser usadas em várias combinações, a fim de aperfeiçoar a qualidade de áudio representada por uma corrente de informação formada por edições de união de duas ou mais outras correntes de informação. As técnicas são particularmente úteis em aplicações que enfeixam a informação de áudio com a informação de vídeo. Em uma técnica, palavras de controle de ganho, transportadas com a corrente de informação de áudio são usadas para interpolar níveis de som de reprodução através de uma união. Em outra técnica, bancos de filtros especiais ou formas de transformação de TDAC são usados para suprimir artefatos de desalinhamento em ambos os lados de uma união. Ainda em outra técnica, bancos de filtros especiais ou funções de janelas de desvanecimento cruzado são usadas para otimizar a atenuação de interferência espectral criada em uma união. Em outra técnica, taxa de amostras de áudio são convertidas de acordo com os comprimentos e taxas de quadros para permitir que a informação de áudio seja enfeixada, por exemplo, com a informação de vídeo. Em outra técnica ainda, blocos de áudio são alinhados, dinamicamente, de modo que a sincronização adequada possa ser mantida através de uma união. Um exemplo para áudio de 48 kHz com vídeo de NTSC é discutido.
BR9813863-4A 1997-10-17 1998-10-01 Codificação de áudio baseada em quadro com banco de filtros adicional para suprimir artefatos de desalinhamento em limites de quadro BR9813863A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/953,121 US5913191A (en) 1997-10-17 1997-10-17 Frame-based audio coding with additional filterbank to suppress aliasing artifacts at frame boundaries
PCT/US1998/020751 WO1999021185A1 (en) 1997-10-17 1998-10-01 Frame-based audio coding with additional filterbank to suppress aliasing artifacts at frame boundaries

Publications (1)

Publication Number Publication Date
BR9813863A true BR9813863A (pt) 2000-09-26

Family

ID=25493597

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9813863-4A BR9813863A (pt) 1997-10-17 1998-10-01 Codificação de áudio baseada em quadro com banco de filtros adicional para suprimir artefatos de desalinhamento em limites de quadro

Country Status (16)

Country Link
US (1) US5913191A (pt)
EP (1) EP1023727B1 (pt)
JP (1) JP4236813B2 (pt)
KR (1) KR100567353B1 (pt)
CN (1) CN1267920C (pt)
AT (1) ATE211576T1 (pt)
AU (1) AU762707B2 (pt)
BR (1) BR9813863A (pt)
CA (1) CA2306113C (pt)
DE (1) DE69803402T2 (pt)
DK (1) DK1023727T3 (pt)
ES (1) ES2165704T3 (pt)
HK (1) HK1033195A1 (pt)
MY (1) MY123186A (pt)
TW (1) TW434529B (pt)
WO (1) WO1999021185A1 (pt)

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JP4867076B2 (ja) * 2001-03-28 2012-02-01 日本電気株式会社 音声合成用圧縮素片作成装置、音声規則合成装置及びそれらに用いる方法
FR2824978B1 (fr) * 2001-05-15 2003-09-19 Wavecom Sa Dispositif et procede de traitement d'un signal audio
US7369709B2 (en) * 2003-09-07 2008-05-06 Microsoft Corporation Conditional lapped transform
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JP2007538282A (ja) * 2004-05-17 2007-12-27 ノキア コーポレイション 各種の符号化フレーム長でのオーディオ符号化
US8744862B2 (en) * 2006-08-18 2014-06-03 Digital Rise Technology Co., Ltd. Window selection based on transient detection and location to provide variable time resolution in processing frame-based data
TWI396188B (zh) * 2005-08-02 2013-05-11 Dolby Lab Licensing Corp 依聆聽事件之函數控制空間音訊編碼參數的技術
KR101482199B1 (ko) * 2006-07-24 2015-01-14 마벨 월드 트레이드 리미티드 오디오 모니터링을 구비한 자기 및 광학 회전형 저장 시스템
JP4245030B2 (ja) * 2006-09-27 2009-03-25 ソニー株式会社 出力処理装置及びその制御方法
CN101179735B (zh) * 2006-11-08 2010-07-14 中兴通讯股份有限公司 一种多媒体广播系统媒体数据流的封装方法
US8214200B2 (en) * 2007-03-14 2012-07-03 Xfrm, Inc. Fast MDCT (modified discrete cosine transform) approximation of a windowed sinusoid
US11657788B2 (en) 2009-05-27 2023-05-23 Dolby International Ab Efficient combined harmonic transposition
TWI643187B (zh) 2009-05-27 2018-12-01 瑞典商杜比國際公司 從訊號的低頻成份產生該訊號之高頻成份的系統與方法，及其機上盒、電腦程式產品、軟體程式及儲存媒體
US9338523B2 (en) * 2009-12-21 2016-05-10 Echostar Technologies L.L.C. Audio splitting with codec-enforced frame sizes
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US8712076B2 (en) 2012-02-08 2014-04-29 Dolby Laboratories Licensing Corporation Post-processing including median filtering of noise suppression gains
US9173025B2 (en) 2012-02-08 2015-10-27 Dolby Laboratories Licensing Corporation Combined suppression of noise, echo, and out-of-location signals
EP2830065A1 (en) 2013-07-22 2015-01-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for decoding an encoded audio signal using a cross-over filter around a transition frequency
EP3342040B1 (en) 2015-08-24 2019-12-18 Dolby Laboratories Licensing Corporation Volume-levelling processing
EP3382701A1 (en) * 2017-03-31 2018-10-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for post-processing an audio signal using prediction based shaping
CN115237369B (zh) * 2022-09-23 2022-12-13 成都博宇利华科技有限公司 一种高精度信息戳标记方法

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Also Published As

Publication number Publication date
JP4236813B2 (ja) 2009-03-11
DE69803402T2 (de) 2002-08-01
EP1023727B1 (en) 2002-01-02
US5913191A (en) 1999-06-15
CN1267920C (zh) 2006-08-02
MY123186A (en) 2006-05-31
DE69803402D1 (de) 2002-02-28
CA2306113C (en) 2005-08-02
CA2306113A1 (en) 1999-04-29
AU1065699A (en) 1999-05-10
ES2165704T3 (es) 2002-03-16
TW434529B (en) 2001-05-16
HK1033195A1 (en) 2001-08-17
EP1023727A1 (en) 2000-08-02
ATE211576T1 (de) 2002-01-15
DK1023727T3 (da) 2002-02-11
WO1999021185A1 (en) 1999-04-29
CN1276903A (zh) 2000-12-13
JP2001521259A (ja) 2001-11-06
KR20010024051A (ko) 2001-03-26
AU762707B2 (en) 2003-07-03
KR100567353B1 (ko) 2006-04-04

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Legal Events

Date Code Title Description
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: INDEFIRIDO COM BASE NO ART.8O COMBINADO COM O ART. 13O DA LPI

B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: MANTIDO O INDEFERIMENTO UMA VEZ QUE NAO FOI APRESENTADO RECURSO DENTRO DO PRAZO LEGAL.

B15K Others concerning applications: alteration of classification

Free format text: PROCEDIMENTO AUTOMATICO DE RECLASSIFICACAO. AS CLASSIFICACOES IPC ANTERIORES ERAM: G11B 20/10; H03H 17/02; H04B 1/66; G10L 7/04.

Ipc: G11B 20/10 (2006.01), G10L 19/02 (2013.01), G10L 2

Ipc: G11B 20/10 (2006.01), G10L 19/02 (2013.01), G10L 2