AR097969A2 - Codificador de audio y método para codificar una señal de audio - Google Patents

Codificador de audio y método para codificar una señal de audio

Info

Publication number
AR097969A2
AR097969A2 ARP140103757A ARP140103757A AR097969A2 AR 097969 A2 AR097969 A2 AR 097969A2 AR P140103757 A ARP140103757 A AR P140103757A AR P140103757 A ARP140103757 A AR P140103757A AR 097969 A2 AR097969 A2 AR 097969A2
Authority
AR
Argentina
Prior art keywords
audio signal
spectral representation
time
noise format
distorted
Prior art date
Application number
ARP140103757A
Other languages
English (en)
Original Assignee
Fraunhofer Ges Forschung
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 Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Publication of AR097969A2 publication Critical patent/AR097969A2/es

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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
    • 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
    • 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
    • G10L21/04—Time compression or expansion
    • 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
    • G10L19/002—Dynamic bit allocation
    • 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
    • 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
    • G10L19/028—Noise substitution, i.e. substituting non-tonal spectral components by noisy source
    • 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
    • G10L19/03—Spectral prediction for preventing pre-echo; Temporary noise shaping [TNS], e.g. in MPEG2 or MPEG4
    • 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
    • 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
    • G10L19/26—Pre-filtering or post-filtering
    • G10L19/265—Pre-filtering, e.g. high frequency emphasis prior to encoding
    • 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
    • G10L21/04—Time compression or expansion
    • G10L21/043—Time compression or expansion by changing speed
    • 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
    • G10L25/90—Pitch determination of speech signals
    • 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
    • G10L19/04—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
    • 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
    • G10L25/78—Detection of presence or absence of voice signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Signal Processing (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Computational Linguistics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Quality & Reliability (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

Codificador de audio para generar una señal de audio, que comprende un distorsionador de tiempo controlable (506) para distorsionar en el tiempo la señal de audio para obtener una señal de audio distorsionada en el tiempo; un convertidor de tiempo / frecuencia (508) para convertir al menos una porción de la señal de audio distorsionada en el tiempo en una representación espectral; una etapa de formato de ruido temporal para realizar una filtración de predicción sobre la frecuencia de la representación espectral de acuerdo con una instrucción de control del formato de ruido temporal (803), en donde la filtración de predicción no se realiza, cuando no existe la instrucción de control del formato de ruido temporal; un controlador de formato de ruido temporal (800, 802, 804) para generar la instrucción de control del formato de ruido temporal sobre la base de la representación espectral, en el cual el controlador del formato de ruido temporal está configurado para aumentar la probabilidad de realizar la filtración predictiva sobre la frecuencia, cuando la representación espectral se basa en una señal de audio distorsionada en el tiempo o para disminuir la probabilidad de realizar la filtración predictiva sobre la frecuencia, cuando la representación espectral no se basa en una señal de audio distorsionada en el tiempo; y un procesador (512) para procesar posteriormente una salida de la etapa de formato de ruido temporal para obtener la señal de audio codificada(532);en donde el controlador de formato de ruido temporal (800, 802, 804) está configurado para estimar una ganancia en una velocidad de bits o una calidad, cuando la señal de audio se somete a la filtración de predicción mediante la etapa de formato de ruido temporal (510), para comparar (802) la ganancia estimada con un umbral de decisión, y para decidir (802) en favor de la filtración de predicción, cuando la ganancia estimada está en una relación predeterminada con el umbral de decisión, en donde el controlador de formato de ruido temporal está además configurado para variar (804) el umbral de decisión de modo que, para la misma ganancia estimada, se activa la filtración de predicción, cuando la representación espectral se basa en una señal distorsionada en el tiempo, y no se activa, cuando la representación espectral no se basa en una señal de audio distorsionada en el tiempo.
ARP140103757A 2008-07-11 2014-10-08 Codificador de audio y método para codificar una señal de audio AR097969A2 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7987308P 2008-07-11 2008-07-11

Publications (1)

Publication Number Publication Date
AR097969A2 true AR097969A2 (es) 2016-04-20

Family

ID=41037694

Family Applications (8)

Application Number Title Priority Date Filing Date
ARP090102631A AR072740A1 (es) 2008-07-11 2009-07-13 Proveedor de la senal de activacion de distorsion de tiempo codificador de senal de audio, metodo para proveer una senal de activacion de distorsion de tiempo metodo para codificar una senal de audio y programas de computacion
ARP140103754A AR097966A2 (es) 2008-07-11 2014-10-08 Proveedor de señal de activación de distorsión de tiempo, codificador de audio y método para codificar una señal de audio y método para aportar una señal de activación de distorsión de tiempo
ARP140103755A AR097967A2 (es) 2008-07-11 2014-10-08 Codificador de audio y método para codificar una señal de audio
ARP140103758A AR097970A2 (es) 2008-07-11 2014-10-08 Codificador de audio y método para codificar una señal de audio
ARP140103756A AR097968A2 (es) 2008-07-11 2014-10-08 Codificador de audio y método para codificar una señal de audio
ARP140103757A AR097969A2 (es) 2008-07-11 2014-10-08 Codificador de audio y método para codificar una señal de audio
ARP140103753A AR097965A2 (es) 2008-07-11 2014-10-08 Proveedor de señal de activación de distorsión de tiempo, codificador de audio y método para codificar una señal de audio y método para aportar una señal de activación de distorsión de tiempo
ARP190102320A AR116330A2 (es) 2008-07-11 2019-08-14 Codificador de audio y método para codificar una señal de audio

Family Applications Before (5)

Application Number Title Priority Date Filing Date
ARP090102631A AR072740A1 (es) 2008-07-11 2009-07-13 Proveedor de la senal de activacion de distorsion de tiempo codificador de senal de audio, metodo para proveer una senal de activacion de distorsion de tiempo metodo para codificar una senal de audio y programas de computacion
ARP140103754A AR097966A2 (es) 2008-07-11 2014-10-08 Proveedor de señal de activación de distorsión de tiempo, codificador de audio y método para codificar una señal de audio y método para aportar una señal de activación de distorsión de tiempo
ARP140103755A AR097967A2 (es) 2008-07-11 2014-10-08 Codificador de audio y método para codificar una señal de audio
ARP140103758A AR097970A2 (es) 2008-07-11 2014-10-08 Codificador de audio y método para codificar una señal de audio
ARP140103756A AR097968A2 (es) 2008-07-11 2014-10-08 Codificador de audio y método para codificar una señal de audio

Family Applications After (2)

Application Number Title Priority Date Filing Date
ARP140103753A AR097965A2 (es) 2008-07-11 2014-10-08 Proveedor de señal de activación de distorsión de tiempo, codificador de audio y método para codificar una señal de audio y método para aportar una señal de activación de distorsión de tiempo
ARP190102320A AR116330A2 (es) 2008-07-11 2019-08-14 Codificador de audio y método para codificar una señal de audio

Country Status (18)

Country Link
US (7) US9015041B2 (es)
EP (5) EP2410521B1 (es)
JP (5) JP5538382B2 (es)
KR (5) KR101400588B1 (es)
CN (5) CN103000178B (es)
AR (8) AR072740A1 (es)
AT (1) ATE539433T1 (es)
AU (1) AU2009267433B2 (es)
BR (1) BRPI0910790A2 (es)
CA (5) CA2836863C (es)
ES (5) ES2654432T3 (es)
HK (5) HK1155551A1 (es)
MX (1) MX2011000368A (es)
PL (4) PL2311033T3 (es)
PT (3) PT2410520T (es)
RU (5) RU2536679C2 (es)
TW (1) TWI463484B (es)
WO (1) WO2010003618A2 (es)

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RU2580096C2 (ru) 2016-04-10
ATE539433T1 (de) 2012-01-15
RU2011104002A (ru) 2012-08-20
CA2836858C (en) 2017-09-12
KR20130086653A (ko) 2013-08-02
HK1182213A1 (en) 2013-11-22
PL2410522T3 (pl) 2018-03-30
JP2014002403A (ja) 2014-01-09
KR20110043589A (ko) 2011-04-27
PT2410522T (pt) 2018-01-09
US9293149B2 (en) 2016-03-22
US9431026B2 (en) 2016-08-30
AU2009267433A1 (en) 2010-01-14
KR101400484B1 (ko) 2014-05-28
US9263057B2 (en) 2016-02-16
AR097966A2 (es) 2016-04-20
US9502049B2 (en) 2016-11-22
ES2741963T3 (es) 2020-02-12
TWI463484B (zh) 2014-12-01
CN103077722A (zh) 2013-05-01
AR116330A2 (es) 2021-04-28
KR20130093670A (ko) 2013-08-22
EP2410520A1 (en) 2012-01-25
CA2836863A1 (en) 2010-01-14
CA2836858A1 (en) 2010-01-14
US20150066488A1 (en) 2015-03-05
JP5567191B2 (ja) 2014-08-06
CA2836862A1 (en) 2010-01-14
EP2410521B1 (en) 2017-10-04
AR097965A2 (es) 2016-04-20
JP2013242599A (ja) 2013-12-05
BRPI0910790A2 (pt) 2023-02-28
CA2730239A1 (en) 2010-01-14
KR20130090919A (ko) 2013-08-14
WO2010003618A3 (en) 2010-03-25
ES2758799T3 (es) 2020-05-06
CN103000177A (zh) 2013-03-27

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