BR112015019543A2 - aparelho e método para codificar e descodificar um sinal de áudio usando uma sobreposição dependente de localização de transiente - Google Patents

aparelho e método para codificar e descodificar um sinal de áudio usando uma sobreposição dependente de localização de transiente

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Publication number
BR112015019543A2
BR112015019543A2 BR112015019543A BR112015019543A BR112015019543A2 BR 112015019543 A2 BR112015019543 A2 BR 112015019543A2 BR 112015019543 A BR112015019543 A BR 112015019543A BR 112015019543 A BR112015019543 A BR 112015019543A BR 112015019543 A2 BR112015019543 A2 BR 112015019543A2
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Brazil
Prior art keywords
transient
window
overlap
location
overlap length
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BR112015019543A
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English (en)
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BR112015019543B1 (pt
Inventor
Edler Bernd
Helmrich Christian
Markovic Goran
Lecomte Jérémie
Schnell Markus
Reuschl Stefan
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Fraunhofer Ges Forschung
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Publication of BR112015019543A2 publication Critical patent/BR112015019543A2/pt
Publication of BR112015019543B1 publication Critical patent/BR112015019543B1/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
    • G10L19/02—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
    • G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
    • G10L19/025—Detection of transients or attacks for time/frequency resolution switching
    • 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
    • G10L19/0212—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 orthogonal transformation
    • 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
    • G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3002—Conversion to or from differential modulation
    • H03M7/3044—Conversion to or from differential modulation with several bits only, i.e. the difference between successive samples being coded by more than one bit, e.g. differential pulse code modulation [DPCM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/44—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

resumo da patente de invenção para: “aparelho e método para codificar e descodificar um sinal de áudio usando uma sobreposição dependente de localização de transiente”. aparelho para codificar um sinal de áudio ou imagem, que compreende: um gerenciador de janelas controlável (102) para a gestão de janelas do sinal de áudio ou imagem para fornecer a sequência de blocos de amostras em janela; um conversor (104) para converter a sequência de blocos de amostras em janela em uma representação espectral, que compreende uma sequência de frames de valores espectrais; um detector de localização de transiente (106) para identificar uma localização de um transiente dentro de uma zona de antecipação de transiente de uma frame; e um controlador (108) para controlar o gerenciador de janelas controlável (102) para aplicar uma janela específica que tem um comprimento de sobreposição especificado ao sinal de áudio ou imagem em resposta a uma localização identificada (210-213) do transiente, em que o controlador (108) está configurado para selecionar a janela específica a partir de um grupo de pelo menos três janelas que compreende uma primeira janela (201) com um primeiro comprimento de sobreposição (203), uma segunda janela (215) com um segundo comprimento de sobreposição (218), e uma terceira janela (224) com um terceiro comprimento de sobreposição (229) ou sem sobreposição, em que o primeiro comprimento de sobreposição (203) é maior do que o segundo comprimento de sobreposição (218), e em que o segundo comprimento de sobreposição (218) é maior do que o terceiro comprimento de sobreposição (229) ou maior do que uma sobreposição zero, em que a janela específica é selecionada com base na localização de transiente, de modo a que uma das duas janelas de sobreposição adjacente de tempo tem coeficientes na localização do transiente e a outra das duas janelas de sobreposição adjacente de tempo em segundos coeficientes de janela na localização do transiente, em que os segundos coeficientes são pelo menos nove vezes maiores do que os primeiros coeficientes. fig. 1a
BR112015019543-1A 2013-02-20 2014-02-20 Aparelho para codificar um sinal de áudio, descodificador para descodificar um sinal de áudio, método para codificar e método para descodificar um sinal de áudio BR112015019543B1 (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201361767115P 2013-02-20 2013-02-20
US61/767,115 2013-02-20
PCT/EP2014/053293 WO2014128197A1 (en) 2013-02-20 2014-02-20 Apparatus and method for encoding or decoding an audio signal using a transient-location dependent overlap

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BR112015019543A2 true BR112015019543A2 (pt) 2017-07-18
BR112015019543B1 BR112015019543B1 (pt) 2022-01-11

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BR112015019543-1A BR112015019543B1 (pt) 2013-02-20 2014-02-20 Aparelho para codificar um sinal de áudio, descodificador para descodificar um sinal de áudio, método para codificar e método para descodificar um sinal de áudio
BR112015019270-0A BR112015019270B1 (pt) 2013-02-20 2014-02-20 aparelho e método para criar um sinal de áudio ou de imagem codificado na presença de transientes, aparelho e método para descodificar um sinal de áudio ou de imagem codificado na presença de transientes

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US (7) US9947329B2 (pt)
EP (4) EP4375996A2 (pt)
JP (2) JP6196324B2 (pt)
KR (2) KR101764725B1 (pt)
CN (5) CN105378835B (pt)
AR (2) AR096576A1 (pt)
AU (2) AU2014220722B2 (pt)
BR (2) BR112015019543B1 (pt)
CA (2) CA2900437C (pt)
ES (2) ES2634621T3 (pt)
HK (2) HK1218988A1 (pt)
MX (2) MX348506B (pt)
MY (2) MY185210A (pt)
PL (2) PL2959481T3 (pt)
PT (2) PT2959481T (pt)
RU (2) RU2626666C2 (pt)
SG (2) SG11201506542QA (pt)
TR (1) TR201910956T4 (pt)
TW (2) TWI550600B (pt)
WO (2) WO2014128197A1 (pt)

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