BR9813246A - Sistema para codificar voz com supressão de ruìdo integrada, e, processo para suprimir ruìdo em um codificador de voz - Google Patents

Sistema para codificar voz com supressão de ruìdo integrada, e, processo para suprimir ruìdo em um codificador de voz

Info

Publication number
BR9813246A
BR9813246A BR9813246-6A BR9813246A BR9813246A BR 9813246 A BR9813246 A BR 9813246A BR 9813246 A BR9813246 A BR 9813246A BR 9813246 A BR9813246 A BR 9813246A
Authority
BR
Brazil
Prior art keywords
noise
group
speech
voice
power spectrum
Prior art date
Application number
BR9813246-6A
Other languages
English (en)
Inventor
Leland S Blocebaum
Phillip M Johnson
Original Assignee
Ericsson 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.)
Filing date
Publication date
Application filed by Ericsson Inc filed Critical Ericsson Inc
Publication of BR9813246A publication Critical patent/BR9813246A/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
    • 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
    • G10L21/0208—Noise filtering
    • 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
    • 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
    • G10L19/10—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a multipulse excitation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Quality & Reliability (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

"SISTEMA PARA CODIFICAR VOZ COM SUPRESSãO DE RUìDO INTEGRADA, E, PROCESSO PARA SUPRIMIR RUìDO EM UM CODIFICADOR DE VOZ" Um sistema para codificar voz enquanto suprimindo ruído de fundo acústico e um processo para suprimir ruído de fundo acústico em um código de voz são descritos aqui. O codificador de voz inclui um amostrador que captura grupos de amostras no domínio do tempo de uma sinal de áudio. Um detetor de atividade de voz operativamente acoplado ao amostrador determina presença ou ausência de fala em um corrente grupo. Um transformador está operativamente acoplado ao amostrador para transformar o grupo de amostras de áudio no domínio do tempo em uma estimativa do espectro de potência daquele grupo. Um adaptador de modelo de ruído operativamente associado com o transformador atualiza um modelo de ruído no domínio da freq³ência baseado na estimativa de espectro de potência do corrente grupo se o detetor de atividade de voz indica uma ausência de fala neste grupo. Um bloco de computação de filtro operativamente acoplado ao adaptador de modelo de ruído e a transformada computa um filtro de intensificação espectral baseado na corrente estimativa de espectro de potência e no modelo de ruído adaptado. Um bloco de intensificação espectral operativamente acoplado ao transformador e ao bloco de computação de filtro aplica o filtro de intensificação espectral à corrente estimativa de espectro de potência. Um quantizador e bloco codificador transforma os parâmetros de modelo de codificador de voz, incluindo as magnitudes espectrais intensificadas, em um grupo de bits codificados.
BR9813246-6A 1998-01-07 1998-12-03 Sistema para codificar voz com supressão de ruìdo integrada, e, processo para suprimir ruìdo em um codificador de voz BR9813246A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/003,967 US6070137A (en) 1998-01-07 1998-01-07 Integrated frequency-domain voice coding using an adaptive spectral enhancement filter
PCT/US1998/025641 WO1999035638A1 (en) 1998-01-07 1998-12-03 A system and method for encoding voice while suppressing acoustic background noise

Publications (1)

Publication Number Publication Date
BR9813246A true BR9813246A (pt) 2000-10-03

Family

ID=21708449

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9813246-6A BR9813246A (pt) 1998-01-07 1998-12-03 Sistema para codificar voz com supressão de ruìdo integrada, e, processo para suprimir ruìdo em um codificador de voz

Country Status (8)

Country Link
US (1) US6070137A (pt)
EP (1) EP1046153B1 (pt)
CN (1) CN1285945A (pt)
AU (1) AU1622699A (pt)
BR (1) BR9813246A (pt)
DE (1) DE69806645D1 (pt)
EE (1) EE04070B1 (pt)
WO (1) WO1999035638A1 (pt)

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Also Published As

Publication number Publication date
EE200000414A (et) 2001-12-17
EP1046153B1 (en) 2002-07-17
EE04070B1 (et) 2003-06-16
EP1046153A1 (en) 2000-10-25
US6070137A (en) 2000-05-30
CN1285945A (zh) 2001-02-28
AU1622699A (en) 1999-07-26
DE69806645D1 (de) 2002-08-22
WO1999035638A1 (en) 1999-07-15

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Legal Events

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B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 8A E 9A ANUIDADES.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO PUBLICADO NA RPI 1930 DE 02/01/2008.

B15K Others concerning applications: alteration of classification

Ipc: G10L 21/0208 (2013.01), G10L 19/02 (2013.0