BR0110831A - Método de uso de processamento de quadros e processamento de subquadros para codificar fala em um sistema de comunicação, sistema de codificação de fala que recebe um sinal de fala, e, método de codificação de fala em um sistema de comunicação - Google Patents

Método de uso de processamento de quadros e processamento de subquadros para codificar fala em um sistema de comunicação, sistema de codificação de fala que recebe um sinal de fala, e, método de codificação de fala em um sistema de comunicação

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Publication number
BR0110831A
BR0110831A BR0110831-0A BR0110831A BR0110831A BR 0110831 A BR0110831 A BR 0110831A BR 0110831 A BR0110831 A BR 0110831A BR 0110831 A BR0110831 A BR 0110831A
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BR
Brazil
Prior art keywords
speech
periodic
gain
signals
communication system
Prior art date
Application number
BR0110831-0A
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English (en)
Inventor
Yang Gao
Adil Benyassine
Original Assignee
Conexant Systems Inc
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.)
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Publication date
Application filed by Conexant Systems Inc filed Critical Conexant Systems Inc
Publication of BR0110831A publication Critical patent/BR0110831A/pt

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    • 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
    • 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
    • G10L19/09—Long term prediction, i.e. removing periodical redundancies, e.g. by using adaptive codebook or pitch predictor
    • 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
    • G10L19/167—Audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission or storage purposes
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • 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)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

"MéTODO DE USO DE PROCESSAMENTO DE QUADROS E PROCESSAMENTO DE SUBQUADROS PARA CODIFICAR FALA EM UM SISTEMA DE COMUNICAçãO, SISTEMA DE CODIFICAçãO DE FALA QUE RECEBE UM SINAL DE FALA, E, MéTODO DE CODIFICAçãO DE FALA EM UM SISTEMA DE COMUNICAçãO". Codificador de fala que analisa e classifica cada quadro de fala como sendo fala semelhante à periódica ou fala semelhante a não periódica, onde o codificador de fala realiza um processo de quantização de ganho diferente, dependendo de se a fala é periódica ou não. Se a fala for periódica, o codificador de fala aperfeiçoado obtém os ganhos de passos de sinal de fala ponderada não quantizado e realiza uma quantização pré-vetorial do ganho de livro de códigos adaptativo G~ p~ para cada subquadro do quadro antes que o processamento do subquadro comece e uma quantização vetorial de decisão retardada de laço fechado do ganho de livro de códigos fixo G~ c~. Se o quadro de fala for não periódico, o codificador de fala pode usar qualquer método conhecido de quantização de ganho. O resultado de ganhos de quantização de fala periódica dessa maneira resulta em uma redução do número de bits requeridos para representar a informação de ganho quantizada e para fala periódica, a capacidade de usar o ganho de passo quantizado para o subquadro corrente para buscar o livro de códigos fixo para o vetor de excitação de livro de códigos fixo para o subquadro corrente. Alternativamente, o novo processo de quantização de ganho, que foi usado apenas para sinais periódicos pode ser estendido para sinais não periódicos, igualmente. Essa segunda estratégia resulta em uma taxa de bits ligeiramente maior do que a dos sinais periódicos que usam a nova estratégia de quantização de ganho, mas é ainda menor do que a taxa de bits da técnica anterior. Ainda outra alternativa é usar o novo processo de quantização de ganho para todos os sinais de fala, sem distinguir entre sinais periódicos e não periódicos.
BR0110831-0A 2000-05-19 2001-04-16 Método de uso de processamento de quadros e processamento de subquadros para codificar fala em um sistema de comunicação, sistema de codificação de fala que recebe um sinal de fala, e, método de codificação de fala em um sistema de comunicação BR0110831A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/574,396 US6782360B1 (en) 1999-09-22 2000-05-19 Gain quantization for a CELP speech coder
PCT/US2001/012396 WO2001091112A1 (en) 2000-05-19 2001-04-16 Gains quantization for a clep speech coder

Publications (1)

Publication Number Publication Date
BR0110831A true BR0110831A (pt) 2004-12-07

Family

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BR0110831-0A BR0110831A (pt) 2000-05-19 2001-04-16 Método de uso de processamento de quadros e processamento de subquadros para codificar fala em um sistema de comunicação, sistema de codificação de fala que recebe um sinal de fala, e, método de codificação de fala em um sistema de comunicação

Country Status (11)

Country Link
US (4) US6782360B1 (pt)
EP (1) EP1338003B1 (pt)
JP (1) JP2004510174A (pt)
KR (1) KR100546444B1 (pt)
CN (1) CN1252681C (pt)
AT (1) ATE343199T1 (pt)
AU (2) AU5542201A (pt)
BR (1) BR0110831A (pt)
DE (1) DE60123999D1 (pt)
RU (2) RU2262748C2 (pt)
WO (2) WO2001022402A1 (pt)

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