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BR9812921A - Codificação de áudio baseada em quadro com um banco de filtro adicional para atenuar o espalhamento espectral nos limites do quadro - Google Patents

Codificação de áudio baseada em quadro com um banco de filtro adicional para atenuar o espalhamento espectral nos limites do quadro

Info

Publication number
BR9812921A
BR9812921A BR9812921-0A BR9812921A BR9812921A BR 9812921 A BR9812921 A BR 9812921A BR 9812921 A BR9812921 A BR 9812921A BR 9812921 A BR9812921 A BR 9812921A
Authority
BR
Brazil
Prior art keywords
audio
splice
information
frame
technique
Prior art date
Application number
BR9812921-0A
Other languages
English (en)
Other versions
BR9812921B1 (pt
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 BR9812921A publication Critical patent/BR9812921A/pt
Publication of BR9812921B1 publication Critical patent/BR9812921B1/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Management Or Editing Of Information On Record Carriers (AREA)
  • Stereophonic System (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

Patente de Invenção: <B>"CODIFICAçãO DE áUDIO BASEADA EM QUADRO COM UM BANCO DE FILTRO ADICIONAL PARA ATENUAR O ESAPALHAMENTO ESPECTRAL NOS LIMITES DO QUADRO".<D> Várias técnicas de processamento de sinal de áudio podem ser usadas em várias combinações para melhorar a qualidade de áudio representada por um fluxo de informação formado por uma edição de entrançamento de dois ou mais outros fluxos de informação. As técnicas são particularmente úteis em aplicações que ligam informação de áudio a informação de vídeo. Em uma técnica, palavras de controle de ganho portadas com o fluxo de informação de áudio são usadas para interpolar níveis de som de execução de gravação através de um entrançamento. Em uma outra técnica, bancos de filtro especiais ou formas de transformadas de TDAC são usadas para suprimir artefatos de desalinhamento em um lado de um entrançamento. Ainda em uma outra técnica, bancos de filtro especiais ou funções de janela de desvanecimento cruzado são usados para otimizar a atenuação de um diversor espectral criado em um entrançamento. Em uma outra técnica, taxas de amostragem de áudio são convertidas de acordo com comprimentos de quadro e taxas para permitirem que a informação de áudio seja colocada junto, por exemplo, de uma informação de vídeo. Ainda em uma outra técnica, blocos de áudio são dinamicamente alinhados de modo que uma sincronização apropriada possa ser mantida através de um entrançamento. Um exemplo de áudio de 48 kHz com vídeo NTSC é discutido.
BRPI9812921-0A 1997-10-17 1998-10-15 método e dispositivo para processamento de sinal. BR9812921B1 (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/953,106 US5903872A (en) 1997-10-17 1997-10-17 Frame-based audio coding with additional filterbank to attenuate spectral splatter at frame boundaries
US08/953,106 1997-10-17
PCT/US1998/021700 WO1999021187A1 (en) 1997-10-17 1998-10-15 Frame-based audio coding with additional filterbank to attenuate spectral splatter at frame boundaries

Publications (2)

Publication Number Publication Date
BR9812921A true BR9812921A (pt) 2000-08-08
BR9812921B1 BR9812921B1 (pt) 2010-11-30

Family

ID=25493577

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI9812921-0A BR9812921B1 (pt) 1997-10-17 1998-10-15 método e dispositivo para processamento de sinal.

Country Status (16)

Country Link
US (1) US5903872A (pt)
EP (1) EP1023730B1 (pt)
JP (1) JP4126680B2 (pt)
KR (1) KR100630893B1 (pt)
CN (1) CN1199179C (pt)
AT (1) ATE210881T1 (pt)
AU (1) AU745914B2 (pt)
BR (1) BR9812921B1 (pt)
CA (1) CA2305237C (pt)
DE (1) DE69802959T2 (pt)
DK (1) DK1023730T3 (pt)
ES (1) ES2165200T3 (pt)
HK (1) HK1033194A1 (pt)
MY (1) MY117166A (pt)
TW (1) TW391137B (pt)
WO (1) WO1999021187A1 (pt)

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US6226608B1 (en) * 1999-01-28 2001-05-01 Dolby Laboratories Licensing Corporation Data framing for adaptive-block-length coding system
US7283965B1 (en) * 1999-06-30 2007-10-16 The Directv Group, Inc. Delivery and transmission of dolby digital AC-3 over television broadcast
US6748363B1 (en) * 2000-06-28 2004-06-08 Texas Instruments Incorporated TI window compression/expansion method
EP1215663A1 (en) * 2000-12-15 2002-06-19 BRITISH TELECOMMUNICATIONS public limited company Encoding audio signals
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
BR0309560B1 (pt) 2002-04-26 2013-06-18 reator de craqueamento catalÍtico de fluxo descendente e sua aplicaÇço
US7292902B2 (en) * 2003-11-12 2007-11-06 Dolby Laboratories Licensing Corporation Frame-based audio transmission/storage with overlap to facilitate smooth crossfading
US20090308229A1 (en) * 2006-06-29 2009-12-17 Nxp B.V. Decoding sound parameters
WO2008146466A1 (ja) * 2007-05-24 2008-12-04 Panasonic Corporation オーディオ復号装置、オーディオ復号方法、プログラム及び集積回路
ATE486407T1 (de) * 2007-07-13 2010-11-15 Dolby Lab Licensing Corp Zeitvariierender tonsignalpegel unter verwendung von zeitvariierender geschätzter wahrscheinlichkeitsdichte des pegels
US20090048827A1 (en) * 2007-08-17 2009-02-19 Manoj Kumar Method and system for audio frame estimation
ES2666719T3 (es) * 2007-12-21 2018-05-07 Orange Codificación/decodificación por transformada, con ventanas adaptativas
TWI484481B (zh) 2009-05-27 2015-05-11 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
US11657788B2 (en) 2009-05-27 2023-05-23 Dolby International Ab Efficient combined harmonic transposition
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
KR101838301B1 (ko) * 2012-02-17 2018-03-13 삼성전자주식회사 멀티미디어 컨텐츠 프레임 검색 방법 및 장치
WO2014046916A1 (en) 2012-09-21 2014-03-27 Dolby Laboratories Licensing Corporation Layered approach to spatial audio coding
TWI557727B (zh) * 2013-04-05 2016-11-11 杜比國際公司 音訊處理系統、多媒體處理系統、處理音訊位元流的方法以及電腦程式產品
EP3998605A1 (en) * 2014-06-10 2022-05-18 MQA Limited Digital encapsulation of audio signals
JP6807031B2 (ja) * 2015-06-10 2021-01-06 ソニー株式会社 信号処理装置、信号処理方法、およびプログラム
PL3503097T3 (pl) * 2016-01-22 2024-03-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Urządzenie oraz sposób do enkodowania lub dekodowania sygnału wielokanałowego z wykorzystaniem ponownego próbkowania w dziedzinie widmowej
EP4462677A3 (en) 2016-02-17 2024-12-18 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Post-processor, pre-processor, audio encoder, audio decoder and related methods for enhancing transient processing
US10726851B2 (en) * 2017-08-31 2020-07-28 Sony Interactive Entertainment Inc. Low latency audio stream acceleration by selectively dropping and blending audio blocks

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JPS60214164A (ja) * 1984-04-09 1985-10-26 Nec Corp オ−デイオシンクロナイザ
US5222189A (en) * 1989-01-27 1993-06-22 Dolby Laboratories Licensing Corporation Low time-delay transform coder, decoder, and encoder/decoder for high-quality audio
US5479562A (en) * 1989-01-27 1995-12-26 Dolby Laboratories Licensing Corporation Method and apparatus for encoding and decoding audio information
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CN1062963C (zh) * 1990-04-12 2001-03-07 多尔拜实验特许公司 用于产生高质量声音信号的解码器和编码器
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Also Published As

Publication number Publication date
BR9812921B1 (pt) 2010-11-30
AU1360899A (en) 1999-05-10
US5903872A (en) 1999-05-11
EP1023730A1 (en) 2000-08-02
CA2305237A1 (en) 1999-04-29
WO1999021187A1 (en) 1999-04-29
MY117166A (en) 2004-05-31
DE69802959D1 (de) 2002-01-24
KR20010024341A (ko) 2001-03-26
ES2165200T3 (es) 2002-03-01
JP2001521308A (ja) 2001-11-06
HK1033194A1 (en) 2001-08-17
CN1199179C (zh) 2005-04-27
ATE210881T1 (de) 2001-12-15
JP4126680B2 (ja) 2008-07-30
KR100630893B1 (ko) 2006-10-02
TW391137B (en) 2000-05-21
AU745914B2 (en) 2002-04-11
EP1023730B1 (en) 2001-12-12
DK1023730T3 (da) 2002-04-02
CN1275234A (zh) 2000-11-29
CA2305237C (en) 2005-12-20
DE69802959T2 (de) 2002-06-20

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Legal Events

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B15K Others concerning applications: alteration of classification

Free format text: ALTERADA PARA INT.CL.2009.01: H04L 5/22; G11B 27/031

Ipc: H04L 5/22 (2009.01), G11B 27/031 (2009.01)

B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 30/11/2010, OBSERVADAS AS CONDICOES LEGAIS.

B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 30.11.2020