ES2631906T3 - Aparato y procedimiento para la generación de valores de subbanda de audio, aparato y procedimiento para la generación de muestras de audio en el dominio temporal - Google Patents
Aparato y procedimiento para la generación de valores de subbanda de audio, aparato y procedimiento para la generación de muestras de audio en el dominio temporal Download PDFInfo
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- ES2631906T3 ES2631906T3 ES07819259T ES07819259T ES2631906T3 ES 2631906 T3 ES2631906 T3 ES 2631906T3 ES 07819259 T ES07819259 T ES 07819259T ES 07819259 T ES07819259 T ES 07819259T ES 2631906 T3 ES2631906 T3 ES 2631906T3
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Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
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- 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
- H03H17/0266—Filter banks
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- 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
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal 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
- G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
Abstract
Aparato destinado a generar valores de subbanda de audio de valor complejo en canales de subbanda de audio, que comprende: un generador de ventanas de análisis (110) para generar una ventana de una trama (120) de muestras de entrada de audio de dominio temporal, que se disponen en una secuencia temporal que se extiende desde una muestra temprana a una muestra tardía, utilizando una función de ventana de análisis (190) que comprende una secuencia de coeficientes de ventana a fin de obtener muestras en ventana, dicha función de ventana de análisis (190) estando compuesta de un primer grupo (200) de coeficientes de ventana, que comprenden una primera parte de la secuencia de coeficientes de ventana, y de un segundo grupo (210) de coeficientes de ventana, que comprende una segunda parte de la secuencia de coeficientes de ventana, la primera parte comprendiendo menos coeficientes de ventana que la segunda parte, de modo que un valor de energía global de los coeficientes de ventana en la primera parte es superior a un valor de energía global de los coeficientes de ventana de la segunda parte, utilizándose el primer grupo de coeficientes de ventana para generar la ventana de muestras tardías en el dominio temporal y utilizándose el segundo grupo de coeficientes de ventana para generar la ventana de muestras tempranas en el dominio temporal, configurándose el generador de ventanas de análisis para funcionar rigiéndose por la ecuación: **Fórmula** siendo zi, n una muestra en ventana de valor real correspondiente al índice de bloque i y al índice de muestra n de una trama, siendo el valor xi, n es una muestra de entrada de audio en el dominio temporal de valor real correspondiente al índice de bloque i y al índice de muestra n, siendo w contiene coeficientes de ventana de valor real de la función de análisis de ventana, y siendo N es un parámetro que designa el número de muestras en un bloque; y una calculadora (170) para calcular los valores de subbanda de audio basándose en las muestras en ventana, comprendiendo dicha calculadora (170) un convertidor tiempo/frecuencia adaptado para generar los valores de subbanda de audio, de modo que todos los valores de subbanda basados en una trama (150) de muestras en ventana forman una representación espectral de las muestras en ventana de la trama (150) de muestras en ventana, y adaptando dicho convertidor de tiempo/frecuencia para generar valores de subbanda de audio de valor complejo, y configurando dicha calculadora para funcionar rigiéndose por las ecuaciones **Fórmula** siendo k, un índice de coeficientes espectrales o índice de banda, un número entero en el rango 0 <= k < N, donde XReal, i ,k y Ximag, i , k representan la parte real y la parte imaginaria de un valor de subbanda de audio de valor complejo correspondiente al índice de bloque i y al índice de coeficientes espectrales k, y siendo no un parámetro representando una opción de índice, y de modo que el aparato destinado a generar los valores de subbanda de audio de valor complejo en los canales de subbanda de audio es un banco de filtros de análisis.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US86295406P | 2006-10-25 | 2006-10-25 | |
PCT/EP2007/009199 WO2008049589A1 (en) | 2006-10-25 | 2007-10-23 | Apparatus and method for generating audio subband values and apparatus and method for generating time-domain audio samples |
Publications (1)
Publication Number | Publication Date |
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ES2631906T3 true ES2631906T3 (es) | 2017-09-06 |
Family
ID=39048961
Family Applications (6)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES07819260T Active ES2328187T3 (es) | 2006-10-25 | 2007-10-23 | Aparato y metodo para generar valores de subbanda de audio y aparato ymetodo para generar muestras de audio de dominio de tiempo. |
ES17169583T Active ES2873254T3 (es) | 2006-10-25 | 2007-10-23 | Aparato y procedimiento para la generación de valores de subbanda de audio de valor complejo |
ES23157260T Active ES2966657T3 (es) | 2006-10-25 | 2007-10-23 | Aparato y procedimiento para la generación de muestras de audio de dominio de tiempo |
ES09010010T Active ES2834024T3 (es) | 2006-10-25 | 2007-10-23 | Aparato y procedimiento para la generación de muestras de audio en el dominio temporal |
ES07819259T Active ES2631906T3 (es) | 2006-10-25 | 2007-10-23 | Aparato y procedimiento para la generación de valores de subbanda de audio, aparato y procedimiento para la generación de muestras de audio en el dominio temporal |
ES21160250T Active ES2947516T3 (es) | 2006-10-25 | 2007-10-23 | Aparato y procedimiento para la generación de valores de subbanda de audio de valor complejo |
Family Applications Before (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES07819260T Active ES2328187T3 (es) | 2006-10-25 | 2007-10-23 | Aparato y metodo para generar valores de subbanda de audio y aparato ymetodo para generar muestras de audio de dominio de tiempo. |
ES17169583T Active ES2873254T3 (es) | 2006-10-25 | 2007-10-23 | Aparato y procedimiento para la generación de valores de subbanda de audio de valor complejo |
ES23157260T Active ES2966657T3 (es) | 2006-10-25 | 2007-10-23 | Aparato y procedimiento para la generación de muestras de audio de dominio de tiempo |
ES09010010T Active ES2834024T3 (es) | 2006-10-25 | 2007-10-23 | Aparato y procedimiento para la generación de muestras de audio en el dominio temporal |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES21160250T Active ES2947516T3 (es) | 2006-10-25 | 2007-10-23 | Aparato y procedimiento para la generación de valores de subbanda de audio de valor complejo |
Country Status (26)
Country | Link |
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US (3) | US8452605B2 (es) |
EP (10) | EP4325723A3 (es) |
JP (2) | JP5083779B2 (es) |
KR (2) | KR101056253B1 (es) |
CN (2) | CN101405791B (es) |
AR (2) | AR063400A1 (es) |
AT (1) | ATE435480T1 (es) |
AU (2) | AU2007308416B2 (es) |
BR (2) | BRPI0716315A2 (es) |
CA (2) | CA2667505C (es) |
DE (1) | DE602007001460D1 (es) |
DK (2) | DK3848928T3 (es) |
ES (6) | ES2328187T3 (es) |
FI (1) | FI3848928T3 (es) |
HK (2) | HK1119824A1 (es) |
HU (1) | HUE064482T2 (es) |
IL (2) | IL193786A (es) |
MX (2) | MX2009004477A (es) |
MY (2) | MY148715A (es) |
NO (3) | NO341567B1 (es) |
PL (6) | PL4207189T3 (es) |
PT (5) | PT2109098T (es) |
RU (2) | RU2420815C2 (es) |
TW (2) | TWI355649B (es) |
WO (2) | WO2008049590A1 (es) |
ZA (2) | ZA200810308B (es) |
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