BR0110252A - Método para compensação de apagamento de frame em um codificador de fala de taxa variável - Google Patents

Método para compensação de apagamento de frame em um codificador de fala de taxa variável

Info

Publication number
BR0110252A
BR0110252A BR0110252-4A BR0110252A BR0110252A BR 0110252 A BR0110252 A BR 0110252A BR 0110252 A BR0110252 A BR 0110252A BR 0110252 A BR0110252 A BR 0110252A
Authority
BR
Brazil
Prior art keywords
lag value
pitch lag
frame
previous frame
delta
Prior art date
Application number
BR0110252-4A
Other languages
English (en)
Inventor
Sharath Manjunath
Penjung Huang
Eddie-Lun Tik Choy
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of BR0110252A publication Critical patent/BR0110252A/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
    • 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
    • G10L19/005—Correction of errors induced by the transmission channel, if related to the coding algorithm
    • 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
    • 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
    • G10L19/097—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters using prototype waveform decomposition or prototype waveform interpolative [PWI] coders

Landscapes

  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Stereophonic System (AREA)
  • Analogue/Digital Conversion (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Devices For Executing Special Programs (AREA)

Abstract

"MéTODO PARA COMPENSAçãO DE APAGAMENTO DE FRAME EM UM CODIFICADOR DE FALA DE TAXA VARIáVEL". Um método para compensação de apagamento de frame em um codificador de fala de taxa variável inclui quantificar, com um primeiro codificador, um valor de atraso (lag) de pitch (tom ou tonalidade da fala) para um frame atual e um primeiro valor delta de atraso de pitch igual à diferença entre o valor de atraso de pitch para o frame atual e o valor de atraso de pitch para o frame anterior. Um segundo codificador preditivo quantifica somente um segundo valor delta de atraso de pitch para o frame anterior (igual à diferença entre o valor de atraso de pitch para o frame anterior e o valor de atraso de pitch para o frame anterior a tal frame)). Caso o frame anterior ao frame anterior seja processado como um apagamento de frame, o valor de atraso de pitch para o frame anterior é obtido pela subtração do primeiro valor delta de atraso de pitch de valor de atraso de pitch para o frame atual. O valor de atraso de pitch para o frame apagado é a seguir obtido pela subtração do segundo valor delta de atraso de pitch do valor de atraso de pitch para o frame anterior. Adicionalmente, pode ser usado um método de interpolação de forma de onda para suavizar as descontinuidades causadas por mudanças na memória de pitch do codificador.
BR0110252-4A 2000-04-24 2001-04-18 Método para compensação de apagamento de frame em um codificador de fala de taxa variável BR0110252A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/557,283 US6584438B1 (en) 2000-04-24 2000-04-24 Frame erasure compensation method in a variable rate speech coder
PCT/US2001/012665 WO2001082289A2 (en) 2000-04-24 2001-04-18 Frame erasure compensation method in a variable rate speech coder

Publications (1)

Publication Number Publication Date
BR0110252A true BR0110252A (pt) 2004-06-29

Family

ID=24224779

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0110252-4A BR0110252A (pt) 2000-04-24 2001-04-18 Método para compensação de apagamento de frame em um codificador de fala de taxa variável

Country Status (12)

Country Link
US (1) US6584438B1 (pt)
EP (3) EP1850326A3 (pt)
JP (1) JP4870313B2 (pt)
KR (1) KR100805983B1 (pt)
CN (1) CN1223989C (pt)
AT (2) ATE368278T1 (pt)
AU (1) AU2001257102A1 (pt)
BR (1) BR0110252A (pt)
DE (2) DE60144259D1 (pt)
ES (2) ES2288950T3 (pt)
TW (1) TW519615B (pt)
WO (1) WO2001082289A2 (pt)

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Also Published As

Publication number Publication date
DE60129544D1 (de) 2007-09-06
DE60129544T2 (de) 2008-04-17
KR100805983B1 (ko) 2008-02-25
ES2360176T3 (es) 2011-06-01
AU2001257102A1 (en) 2001-11-07
TW519615B (en) 2003-02-01
EP1850326A2 (en) 2007-10-31
EP1850326A3 (en) 2007-12-05
KR20020093940A (ko) 2002-12-16
US6584438B1 (en) 2003-06-24
CN1432175A (zh) 2003-07-23
WO2001082289A2 (en) 2001-11-01
JP2004501391A (ja) 2004-01-15
JP4870313B2 (ja) 2012-02-08
WO2001082289A3 (en) 2002-01-10
EP1276832B1 (en) 2007-07-25
HK1055174A1 (en) 2003-12-24
ATE368278T1 (de) 2007-08-15
EP2099028B1 (en) 2011-03-16
EP2099028A1 (en) 2009-09-09
DE60144259D1 (de) 2011-04-28
CN1223989C (zh) 2005-10-19
ATE502379T1 (de) 2011-04-15
EP1276832A2 (en) 2003-01-22
ES2288950T3 (es) 2008-02-01

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