ES2501493T3 - Re-muestreo de señales de salida de códecs de audio basados en QMF - Google Patents

Re-muestreo de señales de salida de códecs de audio basados en QMF Download PDF

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ES2501493T3
ES2501493T3 ES11741598.4T ES11741598T ES2501493T3 ES 2501493 T3 ES2501493 T3 ES 2501493T3 ES 11741598 T ES11741598 T ES 11741598T ES 2501493 T3 ES2501493 T3 ES 2501493T3
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audio signal
filter bank
sampling frequency
analysis
sampling
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Markus Lohwasser
Manuel Jander
Max Neuendorf
Ralf Geiger
Markus Schnell
Matthias Hildenbrand
Tobias Chalupka
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Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
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    • 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
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    • 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
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered 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
    • 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
    • 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
    • G10L19/16—Vocoder architecture
    • 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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0211—Frequency selective networks using specific transformation algorithms, e.g. WALSH functions, Fermat transforms, Mersenne transforms, polynomial transforms, Hilbert transforms
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0248—Filters characterised by a particular frequency response or filtering method
    • H03H17/0264—Filter sets with mutual related characteristics
    • H03H17/0272—Quadrature mirror filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/06—Non-recursive filters
    • H03H17/0621—Non-recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
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    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0294—Variable filters; Programmable filters

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Abstract

Un aparato para el re-muestreo de una señal de audio procesada (SA) que comprende: un primer procesador de señales de audio configurable (110) para procesar una señal de audio (s0) según diferentes ajustes de configuración (conf) para obtener una señal de audio procesada (s1), en el que el aparato está adaptado de modo que diferentes ajustes de configuración (conf) dan como resultado diferentes frecuencias de muestreo (sr1) de la señal de audio procesada (s1), un banco de filtros de análisis (120) que tiene un primer número (c1) de canales de banco de filtros de análisis, un banco de filtros de síntesis (130) que tiene un segundo número (c2) de canales de banco de filtros de síntesis, un segundo procesador de audio (140) que está adaptado para recibir y procesar una señal de audio (s2) que tiene una frecuencia de muestreo predeterminada (sr2), y un controlador (150) para controlar el primer número (c1) de canales de banco de filtros de análisis y el segundo número (c2) de canales de banco de filtros de síntesis de acuerdo con un ajuste de configuración (conf) proporcionado al primer procesador de señales de audio configurable (110), de modo que una salida de señal de audio (s2) del banco de filtros de síntesis (130) tiene la frecuencia de muestreo predeterminada (sr2) o una frecuencia de muestreo (sr2') que es diferente de la frecuencia de muestreo predeterminada (sr2) y que es más cercana a la frecuencia de muestreo predeterminada (sr2) que una frecuencia de muestreo (sr1) de una señal de entrada del banco de filtros de análisis que es la señal de audio procesada (s1).

Description

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ES11741598.4T 2010-08-12 2011-08-11 Re-muestreo de señales de salida de códecs de audio basados en QMF Active ES2501493T3 (es)

Applications Claiming Priority (3)

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US37312610P 2010-08-12 2010-08-12
US373126P 2010-08-12
PCT/EP2011/063848 WO2012020090A1 (en) 2010-08-12 2011-08-11 Resampling output signals of qmf based audio codecs

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US (12) US9595265B2 (es)
EP (1) EP2603913B1 (es)
JP (1) JP5665987B2 (es)
KR (1) KR101517446B1 (es)
CN (1) CN103270553B (es)
AR (1) AR082671A1 (es)
AU (1) AU2011288406B2 (es)
BR (5) BR122021003887B1 (es)
CA (1) CA2807889C (es)
ES (1) ES2501493T3 (es)
MX (1) MX2013001650A (es)
MY (1) MY156027A (es)
PL (1) PL2603913T3 (es)
RU (1) RU2562434C2 (es)
SG (1) SG187743A1 (es)
TW (1) TWI460719B (es)
WO (1) WO2012020090A1 (es)

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AU2011288406B2 (en) 2014-07-31
TWI460719B (zh) 2014-11-11
US11804232B2 (en) 2023-10-31
RU2562434C2 (ru) 2015-09-10
US20220262381A1 (en) 2022-08-18
US20220262382A1 (en) 2022-08-18
US11475905B2 (en) 2022-10-18
US11475906B2 (en) 2022-10-18
PL2603913T3 (pl) 2014-11-28
WO2012020090A1 (en) 2012-02-16
BR122021003887B1 (pt) 2021-08-24
US11810584B2 (en) 2023-11-07
US20220262380A1 (en) 2022-08-18
BR112013003303B1 (pt) 2021-09-28
CA2807889C (en) 2016-07-19
CN103270553B (zh) 2015-08-12
US20220262383A1 (en) 2022-08-18
MX2013001650A (es) 2013-03-20
AU2011288406A1 (en) 2013-03-28
US20210166710A1 (en) 2021-06-03
HK1186832A1 (en) 2014-07-11
US10311886B2 (en) 2019-06-04
US20210166709A1 (en) 2021-06-03
US12154583B2 (en) 2024-11-26
US20190259405A1 (en) 2019-08-22
AR082671A1 (es) 2012-12-26
BR122021003886B1 (pt) 2021-08-17
US20170148462A1 (en) 2017-05-25
EP2603913B1 (en) 2014-06-11
US11961531B2 (en) 2024-04-16
BR122021003884B1 (pt) 2021-11-30
BR122021003688B1 (pt) 2021-08-24
CA2807889A1 (en) 2012-02-16
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US9595265B2 (en) 2017-03-14
US20250046324A1 (en) 2025-02-06
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