BR112015019176A2 - sistema e método de compansão para reduzir o ruído de quantização com o uso de extensão de espectro avançada - Google Patents

sistema e método de compansão para reduzir o ruído de quantização com o uso de extensão de espectro avançada

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Publication number
BR112015019176A2
BR112015019176A2 BR112015019176A BR112015019176A BR112015019176A2 BR 112015019176 A2 BR112015019176 A2 BR 112015019176A2 BR 112015019176 A BR112015019176 A BR 112015019176A BR 112015019176 A BR112015019176 A BR 112015019176A BR 112015019176 A2 BR112015019176 A2 BR 112015019176A2
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BR
Brazil
Prior art keywords
audio signal
segments
frequency domain
initial audio
quantization noise
Prior art date
Application number
BR112015019176A
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English (en)
Other versions
BR112015019176B1 (pt
Inventor
Biswas Arijit
Schug Michael
Hedelin Per
Melkote Vinay
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Dolby Int Ab
Dolby Laboratories Licensing Corp
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Publication date
Application filed by Dolby Int Ab, Dolby Laboratories Licensing Corp filed Critical Dolby Int Ab
Priority to BR122017006632-3A priority Critical patent/BR122017006632A2/pt
Publication of BR112015019176A2 publication Critical patent/BR112015019176A2/pt
Publication of BR112015019176B1 publication Critical patent/BR112015019176B1/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
    • 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
    • G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
    • G10L21/0324—Details of processing therefor
    • G10L21/034—Automatic adjustment
    • 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
    • G10L19/0204—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 using subband decomposition
    • G10L19/0208—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
    • G10L19/02—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
    • G10L19/032—Quantisation or dequantisation of spectral components
    • 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
    • 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
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L21/0232—Processing in the frequency domain
    • 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
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/18—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being spectral information of each sub-band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • 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
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/45—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of analysis window
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/007—Volume compression or expansion in amplifiers of digital or coded signals

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mathematical Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Liquid Crystal Substances (AREA)
  • Stereophonic System (AREA)

Abstract

resumo patente de invenção "sistema e método de compansão para reduzir o ruído de quantização com o uso de extensão de espectro avançada". modalidades referem-se a um método e sistema de compansão para reduzir o ruído de codificação em um codec de áudio. um processo de compressão reduz uma faixa dinâmica original de um sinal de áudio inicial através de um processo de compressão que divide o sinal de áudio inicial em uma pluralidade de segmentos com o uso de um formato de janela definido, calcula um ganho de banda larga no domínio de frequência com o uso de uma média não baseada em energia de amostras do domínio de frequência do sinal de áudio inicial, e aplica valores de ganho individuais para amplificar os segmentos de intensidade relativamente baixa e atenuar os segmentos de intensidade relativamente alta. o sinal de áudio comprimido é, então, expandido de volta para substancialmente a faixa dinâmica original que aplica valores de ganho inversos para amplificar os segmentos de intensidade relativamente alta e atenuar os segmentos de intensidade relativamente baixa. um banco de filtros qmf é usado para analisar o sinal de áudio inicial para obter uma representação de domínio de frequência.
BR112015019176-2A 2013-04-05 2014-04-01 método e aparelho de expansão de um sinal de áudio, método e aparelho de compressão de um sinal de áudio, e mídia legível por computador BR112015019176B1 (pt)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR122017006632-3A BR122017006632A2 (pt) 2013-04-05 2014-04-01 Sistema e método de compansão para reduzir o ruído de quantização com o uso de extensão de espectro avançada

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US201361809028P 2013-04-05 2013-04-05
US61/809,028 2013-04-05
US201361877167P 2013-09-12 2013-09-12
US61/877,167 2013-09-12
PCT/US2014/032578 WO2014165543A1 (en) 2013-04-05 2014-04-01 Companding apparatus and method to reduce quantization noise using advanced spectral extension

Publications (2)

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BR112015019176A2 true BR112015019176A2 (pt) 2017-07-18
BR112015019176B1 BR112015019176B1 (pt) 2021-02-09

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BR122017006632-3A BR122017006632A2 (pt) 2013-04-05 2014-04-01 Sistema e método de compansão para reduzir o ruído de quantização com o uso de extensão de espectro avançada

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US (6) US9947335B2 (pt)
EP (3) EP3564953B1 (pt)
JP (7) JP6026678B2 (pt)
KR (7) KR102509345B1 (pt)
CN (8) CN114566183A (pt)
AP (1) AP2015008800A0 (pt)
AU (1) AU2014248232B2 (pt)
BR (2) BR112015019176B1 (pt)
CA (1) CA2900724C (pt)
CL (1) CL2015002278A1 (pt)
DK (1) DK2981963T3 (pt)
EA (1) EA028755B9 (pt)
ES (1) ES2617314T3 (pt)
HK (4) HK1254790A1 (pt)
HU (1) HUE031966T2 (pt)
IL (8) IL300496A (pt)
ME (1) ME02623B (pt)
MX (1) MX342965B (pt)
MY (2) MY197063A (pt)
PL (1) PL2981963T3 (pt)
RU (2) RU2600527C1 (pt)
SG (1) SG11201506134XA (pt)
WO (1) WO2014165543A1 (pt)
ZA (1) ZA201600393B (pt)

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