MX343673B - Codificador y decodificador de audio. - Google Patents
Codificador y decodificador de audio.Info
- Publication number
- MX343673B MX343673B MX2015013927A MX2015013927A MX343673B MX 343673 B MX343673 B MX 343673B MX 2015013927 A MX2015013927 A MX 2015013927A MX 2015013927 A MX2015013927 A MX 2015013927A MX 343673 B MX343673 B MX 343673B
- Authority
- MX
- Mexico
- Prior art keywords
- blocks
- transform coefficients
- encoder
- envelope
- transform
- 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
- G10L19/02—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
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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
-
- 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
- G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
Abstract
El presente documento se refiere a un sistema de codificación y decodificación de audio (referido como un sistema codec de audio). En particular, el presente documento se refiere a un sistema códec de audio en base a la transformada, que es particularmente muy adecuado para codificar/decodificar voz. Se describe un codificador de voz en base a la transformada (100, 170) configurado para codificar una señal de voz en una corriente de bits. El codificador (100, 170) comprende una unidad de encuadre (101) configurada para recibir un conjunto (132, 332) de bloques; en donde el conjunto (132, 332) de bloques comprende una pluralidad de bloques secuenciales (131) de coeficientes de transformada; en donde la pluralidad de bloques (131) es indicativa de muestras de la señal de voz; en donde un bloque (131) de coeficientes de transformada comprende una pluralidad de coeficientes de transformada para una pluralidad correspondiente de bins de frecuencia (301) Además, el codificador (100, 170) comprende una unidad de estimación de la envolvente (102) configurada para determinar una envolvente actual (133) en base a la pluralidad de bloques secuenciales (131) de coeficientes de transformada; en donde la envolvente actual (133) es indicativa de una pluralidad de valores de energía espectral (303) para la correspondiente pluralidad de bins de frecuencia (301) Además, el codificador (100, 170) comprende una unidad de interpolación de la envolvente (104) configurada para determinar una pluralidad de envolventes interpoladas (136) para la pluralidad de bloques (131) de coeficientes de transformada, respectivamente, en base a la envolvente actual (133). Además, el codificador (100, 170) comprende una unidad de aplanamiento (108) configurado para determinar una pluralidad de bloques (140) de coeficientes de transformada aplanadados mediante el aplanamiento de la correspondiente pluralidad de bloques (131) de coeficientes de transformada uttilizando la correspondiente pluralidad de envolventes interpoladas (136), respectivamente; en donde la corriente de bits se determina en base a la pluralidad de bloques (140) de coeficientes de transformada aplanadados.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361808675P | 2013-04-05 | 2013-04-05 | |
US201361875553P | 2013-09-09 | 2013-09-09 | |
PCT/EP2014/056851 WO2014161991A2 (en) | 2013-04-05 | 2014-04-04 | Audio encoder and decoder |
Publications (2)
Publication Number | Publication Date |
---|---|
MX2015013927A MX2015013927A (es) | 2015-12-11 |
MX343673B true MX343673B (es) | 2016-11-16 |
Family
ID=50439392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MX2015013927A MX343673B (es) | 2013-04-05 | 2014-04-04 | Codificador y decodificador de audio. |
Country Status (20)
Country | Link |
---|---|
US (4) | US10043528B2 (es) |
EP (3) | EP2981958B1 (es) |
JP (1) | JP6227117B2 (es) |
KR (5) | KR102028888B1 (es) |
CN (2) | CN109712633B (es) |
AU (6) | AU2014247000B2 (es) |
BR (3) | BR122020017853B1 (es) |
CA (6) | CA2948694C (es) |
DK (1) | DK2981958T3 (es) |
ES (1) | ES2665599T3 (es) |
HK (2) | HK1218802A1 (es) |
HU (1) | HUE039143T2 (es) |
IL (5) | IL294836A (es) |
MX (1) | MX343673B (es) |
MY (1) | MY176447A (es) |
PL (1) | PL2981958T3 (es) |
RU (3) | RU2630887C2 (es) |
SG (1) | SG11201507703SA (es) |
UA (1) | UA114967C2 (es) |
WO (1) | WO2014161991A2 (es) |
Families Citing this family (13)
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ES2665599T3 (es) | 2013-04-05 | 2018-04-26 | Dolby International Ab | Codificador y descodificador de audio |
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AU2015291897B2 (en) * | 2014-07-25 | 2019-02-21 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Acoustic signal encoding device, acoustic signal decoding device, method for encoding acoustic signal, and method for decoding acoustic signal |
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2014
- 2014-04-04 ES ES14715307.6T patent/ES2665599T3/es active Active
- 2014-04-04 EP EP14715307.6A patent/EP2981958B1/en active Active
- 2014-04-04 RU RU2015147276A patent/RU2630887C2/ru active
- 2014-04-04 CN CN201910177919.0A patent/CN109712633B/zh active Active
- 2014-04-04 EP EP19200800.1A patent/EP3671738A1/en active Pending
- 2014-04-04 CA CA2948694A patent/CA2948694C/en active Active
- 2014-04-04 KR KR1020167029688A patent/KR102028888B1/ko active IP Right Grant
- 2014-04-04 WO PCT/EP2014/056851 patent/WO2014161991A2/en active Application Filing
- 2014-04-04 CN CN201480024367.5A patent/CN105247614B/zh active Active
- 2014-04-04 PL PL14715307T patent/PL2981958T3/pl unknown
- 2014-04-04 BR BR122020017853-1A patent/BR122020017853B1/pt active IP Right Grant
- 2014-04-04 MY MYPI2015703311A patent/MY176447A/en unknown
- 2014-04-04 DK DK14715307.6T patent/DK2981958T3/en active
- 2014-04-04 RU RU2017129566A patent/RU2740690C2/ru active
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