BRPI0415951A - método e codificador de áudio para codificar um sinal de áudio, aparelho para transmitir ou armazenar um sinal de áudio codificado baseado em um sinal de áudio de entrada, método e decodificador de áudio para decodificar um sinal de áudio codificado, aparelho para reproduzir um sinal de áudio de saìda, e, produto de programa de computação - Google Patents

método e codificador de áudio para codificar um sinal de áudio, aparelho para transmitir ou armazenar um sinal de áudio codificado baseado em um sinal de áudio de entrada, método e decodificador de áudio para decodificar um sinal de áudio codificado, aparelho para reproduzir um sinal de áudio de saìda, e, produto de programa de computação

Info

Publication number
BRPI0415951A
BRPI0415951A BRPI0415951-9A BRPI0415951A BRPI0415951A BR PI0415951 A BRPI0415951 A BR PI0415951A BR PI0415951 A BRPI0415951 A BR PI0415951A BR PI0415951 A BRPI0415951 A BR PI0415951A
Authority
BR
Brazil
Prior art keywords
audio signal
audio
subband signals
encoded
downsampled
Prior art date
Application number
BRPI0415951-9A
Other languages
English (en)
Inventor
Lars F Villemoes
Per Ekstrand
Heiko Purnhagen
Fransiscus M J De Bont
Erik G P Schuijers
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34530779&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=BRPI0415951(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Priority to BR122018007834-0A priority Critical patent/BR122018007834B1/pt
Publication of BRPI0415951A publication Critical patent/BRPI0415951A/pt
Publication of BRPI0415951A8 publication Critical patent/BRPI0415951A8/pt
Publication of BRPI0415951B1 publication Critical patent/BRPI0415951B1/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
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
    • 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)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Signal Processing (AREA)
  • Computational Linguistics (AREA)
  • Mathematical Physics (AREA)
  • Quality & Reliability (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Stereophonic System (AREA)
  • Insulated Conductors (AREA)

Abstract

"MéTODO E CODIFICADOR DE áUDIO PARA CODIFICAR UM SINAL DE áUDIO, APARELHO PARA TRANSMITIR OU ARMAZENAR UM SINAL DE áUDIO CODIFICADO BASEADO EM UM SINAL DE áUDIO DE ENTRADA, MéTODO E DECODIFICADOR DE áUDIO PARA DECODIFICAR UM SINAL DE áUDIO CODIFICADO, APARELHO PARA REPRODUZIR UM SINAL DE áUDIO DE SAìDA, E, PRODUTO DE PROGRAMA DE COMPUTAçãO". Codificar um sinal de áudio é provido em que o sinal de áudio inclui um primeiro canal de áudio e um segundo canal de áudio, a codificação incluindo filtrar em sub-banda cada um do primeiro canal de áudio e do segundo canal de áudio em um banco de filtro modulado complexo para prover uma primeira pluralidade de sinais de sub-banda para o primeiro canal de áudio e uma segunda pluralidade de sinais de sub-banda para o segundo canal de áudio, amostrar descendentemente cada um dos sinais de sub-banda para prover uma primeira pluralidade de sinais de sub-banda amostrados descendentemente e uma segunda pluralidade de sinais de sub-banda amostrados descendentemente, adicionalmente filtrar em sub-banda pelo menos um dos sinais de sub-banda amostrados descendentemente em um banco de filtro adicional a fim de prover uma pluralidade de sinais de sub-sub-banda, derivar parâmetros espaciais dos sinais de sub-sub-banda e daqueles sinais de sub-banda amostrados descendentemente que não são adicionalmente filtrados em sub-banda, e derivar um único sinal de áudio de canal incluindo sinais de sub-banda derivados, derivados da primeira pluralidade de sinais de sub-banda amostrados descendentemente e da segunda pluralidade de sinais de sub-banda amostrados descendentemente. Adicionalmente, decodificação é provida em que um sinal de áudio codificado incluindo um canal de áudio de canal único codificado e um conjunto de parâmetros espaciais é decodificado, decodificando o canal de áudio de canal único codificado para obter uma pluralidade de sinais de sub-banda amostrados descendentemente, adicionalmente filtrando em sub-banda pelo menos um dos sinais de sub-banda amostrados descendentemente em um banco de filtro adicional a fim de prover uma pluralidade de sinais de sub-sub-banda, e derivando dois canais de áudio dos parâmetros espaciais, dos sinais de sub-sub-banda e daqueles sinais de sub-banda amostrados descendentemente que não são adicionalmente filtrados em sub-banda.
BRPI0415951A 2003-10-30 2004-10-28 método e codificador de áudio para codificar um sinal de áudio, e, método e decodificador de áudio para decodificar um sinal de áudio codificado BRPI0415951B1 (pt)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR122018007834-0A BR122018007834B1 (pt) 2003-10-30 2004-10-28 Codificador e decodificador de áudio avançado de estéreo paramétrico combinado e de replicação de banda espectral, método de codificação avançada de áudio de estéreo paramétrico combinado e de replicação de banda espectral, sinal de áudio avançado codificado de estéreo paramétrico combinado e de replicação de banda espectral, método de decodificação avançada de áudio de estéreo paramétrico combinado e de replicação de banda espectral, e, meio de armazenamento legível por computador

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP03104034 2003-10-30
PCT/IB2004/052226 WO2005043511A1 (en) 2003-10-30 2004-10-28 Audio signal encoding or decoding

Publications (3)

Publication Number Publication Date
BRPI0415951A true BRPI0415951A (pt) 2007-01-02
BRPI0415951A8 BRPI0415951A8 (pt) 2018-05-02
BRPI0415951B1 BRPI0415951B1 (pt) 2018-08-28

Family

ID=34530779

Family Applications (2)

Application Number Title Priority Date Filing Date
BRPI0415951A BRPI0415951B1 (pt) 2003-10-30 2004-10-28 método e codificador de áudio para codificar um sinal de áudio, e, método e decodificador de áudio para decodificar um sinal de áudio codificado
BR122018007834-0A BR122018007834B1 (pt) 2003-10-30 2004-10-28 Codificador e decodificador de áudio avançado de estéreo paramétrico combinado e de replicação de banda espectral, método de codificação avançada de áudio de estéreo paramétrico combinado e de replicação de banda espectral, sinal de áudio avançado codificado de estéreo paramétrico combinado e de replicação de banda espectral, método de decodificação avançada de áudio de estéreo paramétrico combinado e de replicação de banda espectral, e, meio de armazenamento legível por computador

Family Applications After (1)

Application Number Title Priority Date Filing Date
BR122018007834-0A BR122018007834B1 (pt) 2003-10-30 2004-10-28 Codificador e decodificador de áudio avançado de estéreo paramétrico combinado e de replicação de banda espectral, método de codificação avançada de áudio de estéreo paramétrico combinado e de replicação de banda espectral, sinal de áudio avançado codificado de estéreo paramétrico combinado e de replicação de banda espectral, método de decodificação avançada de áudio de estéreo paramétrico combinado e de replicação de banda espectral, e, meio de armazenamento legível por computador

Country Status (12)

Country Link
US (3) US7519538B2 (pt)
EP (1) EP1683133B1 (pt)
JP (4) JP4966013B2 (pt)
KR (2) KR101106026B1 (pt)
CN (2) CN1875402B (pt)
AT (1) ATE354160T1 (pt)
BR (2) BRPI0415951B1 (pt)
DE (1) DE602004004818T2 (pt)
ES (1) ES2282899T3 (pt)
PL (1) PL1683133T3 (pt)
RU (1) RU2374703C2 (pt)
WO (1) WO2005043511A1 (pt)

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