BRPI0409970A - método e codificador para codificar um sinal de som amostrado, método e decodificador para decodificar um fluxo de bit representativo de um sinal de som amostrado, fluxo de bit representativo de um sinal de som amostrado, telefone celular, sistema de comunicação de fala, e, programa de computador - Google Patents

método e codificador para codificar um sinal de som amostrado, método e decodificador para decodificar um fluxo de bit representativo de um sinal de som amostrado, fluxo de bit representativo de um sinal de som amostrado, telefone celular, sistema de comunicação de fala, e, programa de computador

Info

Publication number
BRPI0409970A
BRPI0409970A BRPI0409970-2A BRPI0409970A BRPI0409970A BR PI0409970 A BRPI0409970 A BR PI0409970A BR PI0409970 A BRPI0409970 A BR PI0409970A BR PI0409970 A BRPI0409970 A BR PI0409970A
Authority
BR
Brazil
Prior art keywords
sound signal
sampled sound
bit stream
representative
codebook
Prior art date
Application number
BRPI0409970-2A
Other languages
English (en)
Inventor
Milan Jelinek
Redwan Salami
Original Assignee
Nokia 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 Nokia Corp filed Critical Nokia Corp
Publication of BRPI0409970A publication Critical patent/BRPI0409970A/pt
Publication of BRPI0409970B1 publication Critical patent/BRPI0409970B1/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
    • G10L19/04—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
    • G10L19/083—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being an excitation gain
    • 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
    • G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] 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
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Quality & Reliability (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Image Processing (AREA)

Abstract

"MéTODO E CODIFICADOR PARA CODIFICAR UM SINAL DE SOM AMOSTRADO, MéTODO E DECODIFICADOR PARA DECODIFICAR UM FLUXO DE BIT REPRESENTATIVO DE UM SINAL DE SOM AMOSTRADO, FLUXO DE BIT REPRESENTATIVO DE UM SINAL DE SOM AMOSTRADO, TELEFONE CELULAR, SISTEMA DE COMUNICAçãO DE FALA, E, PROGRAMA DE COMPUTADOR". A presente invenção relaciona a um método de quantização de ganho e a um dispositivo para implementar a técnica de codificação de um sinal de som amostrado e processado, durante a codificação, por quadros sucessivos de L amostras, onde cada quadro é dividido em um número de sub-quadros e cada sub-quadro compreende um número N de amostras, onde N <L. No método e dispositivo de quantização de ganho, o ganho de passo inicial é calculado baseado em um número f de sub-quadros, uma parte do livro-código de quantização de ganho é selecionada em relação ao ganho de passo inicial, e os ganhos de passo e de livro-código fixo são quantificados juntos. A quantização de união dos ganhos de passo e de livro-código fixo compreende, para o número f de sub-quadros, buscar o livro-código de quantização de ganho em relação a um critério de busca. A busca do livro-código é restrita à parte selecionada do livro-código de quantização de ganho e um índice da parte selecionada do melhor livro-código de quantização de ganho que satisfaz o critério de busca é encontrado.
BRPI0409970-2A 2003-05-01 2004-03-12 “Método para codificar um sinal de som amostrado, método para decodificar um fluxo de bit representativo de um sinal de som amostrado, codificador, decodificador e fluxo de bit” BRPI0409970B1 (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US46678403P 2003-05-01 2003-05-01
US60/466,784 2003-05-01
PCT/CA2004/000380 WO2004097797A1 (en) 2003-05-01 2004-03-12 Method and device for gain quantization in variable bit rate wideband speech coding

Publications (2)

Publication Number Publication Date
BRPI0409970A true BRPI0409970A (pt) 2006-04-25
BRPI0409970B1 BRPI0409970B1 (pt) 2018-07-24

Family

ID=33418422

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0409970-2A BRPI0409970B1 (pt) 2003-05-01 2004-03-12 “Método para codificar um sinal de som amostrado, método para decodificar um fluxo de bit representativo de um sinal de som amostrado, codificador, decodificador e fluxo de bit”

Country Status (11)

Country Link
US (1) US7778827B2 (pt)
EP (1) EP1618557B1 (pt)
JP (1) JP4390803B2 (pt)
KR (1) KR100732659B1 (pt)
CN (1) CN1820306B (pt)
AT (1) ATE368279T1 (pt)
BR (1) BRPI0409970B1 (pt)
DE (1) DE602004007786T2 (pt)
MY (1) MY143176A (pt)
RU (1) RU2316059C2 (pt)
WO (1) WO2004097797A1 (pt)

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Also Published As

Publication number Publication date
KR100732659B1 (ko) 2007-06-27
KR20060007412A (ko) 2006-01-24
US7778827B2 (en) 2010-08-17
EP1618557A1 (en) 2006-01-25
CN1820306A (zh) 2006-08-16
DE602004007786D1 (de) 2007-09-06
DE602004007786T2 (de) 2008-04-30
WO2004097797A1 (en) 2004-11-11
RU2005137320A (ru) 2006-06-10
BRPI0409970B1 (pt) 2018-07-24
EP1618557B1 (en) 2007-07-25
US20050251387A1 (en) 2005-11-10
JP4390803B2 (ja) 2009-12-24
CN1820306B (zh) 2010-05-05
JP2006525533A (ja) 2006-11-09
HK1082315A1 (en) 2006-06-02
ATE368279T1 (de) 2007-08-15
MY143176A (en) 2011-03-31
RU2316059C2 (ru) 2008-01-27

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