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AR097967A2 - 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
AR097967A2
AR097967A2 ARP140103755A ARP140103755A AR097967A2 AR 097967 A2 AR097967 A2 AR 097967A2 AR P140103755 A ARP140103755 A AR P140103755A AR P140103755 A ARP140103755 A AR P140103755A AR 097967 A2 AR097967 A2 AR 097967A2
Authority
AR
Argentina
Prior art keywords
audio
time
audio signal
noise fill
harmonic
Prior art date
Application number
ARP140103755A
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 AR097967A2 publication Critical patent/AR097967A2/es

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
    • 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
    • G10L19/002—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
    • 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
    • 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)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

Codificador de audio para codificar una señal de audio, que comprende un distorsionador de tiempo (506); un conversor de frecuencia de tiempo (508) para realizar una conversión de frecuencia / tiempo de una señal de audio distorsionada en el tiempo en una representación espectral; un cuantificador (512) para cuantificar valores de audio, en donde el cuantificador está configurado para cuantificar en cero valores de audio por debajo de un umbral de cuantización; un calculador de relleno de ruido (524) para estimar una medida de una energía de valores de audio cuantificados en cero para un marco de tiempo de la señal de audio a fin de obtener una medida de relleno de ruido; un analizador de la señal de audio (516, 520) para analizar, si el marco de tiempo de la señal de audio tiene una característica armónica o de expresión; un manipulador (602) para manipular la medida de relleno de ruido que depende de una característica armónica o de expresión de la señal de audio para obtener una medida de relleno de ruido manipulada; y una interfaz de salida (522) para generar una señal codificada para la transmisión o el almacenamiento, en donde la señal codificada comprende la medida de relleno de ruido manipulada (530); en el cual el manipulador (602) está configurado para aplicar un nivel de ruido normal cuando la señal no tiene una característica armónica o de expresión y cuando no se aplica una distorsión de tiempo, y para manipular el nivel de relleno de ruido para que sea más bajo que en el caso normal cuando se encuentra un contorno de tono, lo cual indica un contenido armónico, y la distorsión de tiempo está activa.
ARP140103755A 2008-07-11 2014-10-08 Codificador de audio y método para codificar una señal de audio AR097967A2 (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
AR097967A2 true AR097967A2 (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
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
ARP140103756A AR097968A2 (es) 2008-07-11 2014-10-08 Codificador de audio y método para codificar una señal de audio
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
ARP140103757A AR097969A2 (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
ARP190102320A AR116330A2 (es) 2008-07-11 2019-08-14 Codificador de audio y método para codificar una señal de audio

Family Applications Before (4)

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
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
ARP140103756A AR097968A2 (es) 2008-07-11 2014-10-08 Codificador de audio y método para codificar una señal de audio
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

Family Applications After (3)

Application Number Title Priority Date Filing Date
ARP140103757A AR097969A2 (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
ARP190102320A AR116330A2 (es) 2008-07-11 2019-08-14 Codificador de audio y método para codificar una señal de audio

Country Status (16)

Country Link
US (7) US9015041B2 (es)
EP (5) EP2311033B1 (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)
CA (5) CA2836858C (es)
ES (5) ES2758799T3 (es)
MX (1) MX2011000368A (es)
PL (4) PL2311033T3 (es)
PT (3) PT2410521T (es)
RU (5) RU2536679C2 (es)
TW (1) TWI463484B (es)
WO (1) WO2010003618A2 (es)

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