CO6341674A2 - Un aparato y un metodo para decodificar una señal de audio codificada - Google Patents
Un aparato y un metodo para decodificar una señal de audio codificadaInfo
- Publication number
- CO6341674A2 CO6341674A2 CO11001549A CO11001549A CO6341674A2 CO 6341674 A2 CO6341674 A2 CO 6341674A2 CO 11001549 A CO11001549 A CO 11001549A CO 11001549 A CO11001549 A CO 11001549A CO 6341674 A2 CO6341674 A2 CO 6341674A2
- Authority
- CO
- Colombia
- Prior art keywords
- decoding
- algorithm
- encoded
- audio signal
- signal
- Prior art date
Links
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
- G10L19/04—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
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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
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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
- G10L19/04—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
-
- 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
- G10L19/04—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
- G10L19/20—Vocoders using multiple modes using sound class specific coding, hybrid encoders or object based coding
-
- 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
- G10L21/04—Time compression or expansion
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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
- 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 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
- G10L19/0212—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 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
Abstract
La presente invención se refiere a un aparato para decodificar (100) una señal de audio codificada (102), en donde la señal de audio codificada, el aparato para decodificar comprende:Un primer decodificador (iba) decodifica la primera porción (104a) de acuerdo con el primer algoritmo de decodificación para una primera porción de tiempo de la señal codificada (102) para obtener una primera señal decodificada (114a);Un segundo decodificador (110b) decodifica la segunda porción (104b) de acuerdo con el segundo algoritmo de decodificación para una segunda porción de tiempo de la señal codificada (102) para obtener una segunda señal decodificada (114b)Un módulo BWE (130) posee una frecuencia de cruce (fx) controlable, el módulo BWE (130) configurado para desarrollar un algoritmo de ampliación de ancho de banda utilizando la primera señal decodificada (114a) y los parámetros BWE (106) para la primera porción (104a), y para desarrollar un algoritmo de ampliación de ancho de banda utilizando la segunda señal decodificada (114b) y el parámetro de ampliación de ancho de banda (106) para la segunda porción (104b).Un controlador (140) controlar la frecuencia de cruce (fx) para el módulo BWE (130) de acuerdo con la información del modo de codificación (108).Adicionalmente, la presente invención se refiere al método para decodificar una señal de audio codificada (102), que comprende una primera porción (104a) codificada de acuerdo con un primer algoritmo de codificación, una segunda porción (104b) codificada de acuerdo con un segundo algoritmo de codificación, parámetros BWE (106) para la primera porción (104a) y la segunda porción (104b) y una información del modo de codificación (108) que indica un primer algoritmo de decodificación o un segundo algoritmo de decodificación.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7984108P | 2008-07-11 | 2008-07-11 | |
US10382008P | 2008-10-08 | 2008-10-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
CO6341674A2 true CO6341674A2 (es) | 2011-11-21 |
Family
ID=40886797
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CO11001549A CO6341674A2 (es) | 2008-07-11 | 2011-01-07 | Un aparato y un metodo para decodificar una señal de audio codificada |
Country Status (19)
Country | Link |
---|---|
US (1) | US8275626B2 (es) |
EP (2) | EP2304723B1 (es) |
JP (1) | JP5325293B2 (es) |
KR (1) | KR101224560B1 (es) |
CN (1) | CN102089814B (es) |
AR (1) | AR072481A1 (es) |
AU (1) | AU2009267531B2 (es) |
BR (1) | BRPI0910511B1 (es) |
CA (1) | CA2730232C (es) |
CO (1) | CO6341674A2 (es) |
ES (2) | ES2396927T3 (es) |
HK (2) | HK1154432A1 (es) |
IL (1) | IL210414A (es) |
MX (1) | MX2011000370A (es) |
PL (2) | PL2304723T3 (es) |
RU (1) | RU2483366C2 (es) |
TW (1) | TWI435316B (es) |
WO (1) | WO2010003545A1 (es) |
ZA (1) | ZA201100087B (es) |
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DE602008005250D1 (de) * | 2008-01-04 | 2011-04-14 | Dolby Sweden Ab | Audiokodierer und -dekodierer |
RU2455709C2 (ru) * | 2008-03-03 | 2012-07-10 | ЭлДжи ЭЛЕКТРОНИКС ИНК. | Способ и устройство для обработки аудиосигнала |
CN102007534B (zh) * | 2008-03-04 | 2012-11-21 | Lg电子株式会社 | 用于处理音频信号的方法和装置 |
EP2144231A1 (en) * | 2008-07-11 | 2010-01-13 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Low bitrate audio encoding/decoding scheme with common preprocessing |
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