ES2068172T1 - Codificador de señales audio de bajo retardo que emplea tecnicas de analisis por sintesis. - Google Patents
Codificador de señales audio de bajo retardo que emplea tecnicas de analisis por sintesis.Info
- Publication number
- ES2068172T1 ES2068172T1 ES93112293T ES93112293T ES2068172T1 ES 2068172 T1 ES2068172 T1 ES 2068172T1 ES 93112293 T ES93112293 T ES 93112293T ES 93112293 T ES93112293 T ES 93112293T ES 2068172 T1 ES2068172 T1 ES 2068172T1
- Authority
- ES
- Spain
- Prior art keywords
- analysis techniques
- low delay
- audio signal
- delay audio
- synthesis analysis
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 230000015572 biosynthetic process Effects 0.000 title abstract 3
- 238000003786 synthesis reaction Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- 230000005236 sound signal Effects 0.000 title 1
- 239000013598 vector Substances 0.000 abstract 2
- 230000003595 spectral effect Effects 0.000 abstract 1
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
- 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
- G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
-
- 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
- G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] 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
- G10L2019/0001—Codebooks
- G10L2019/0003—Backward prediction of gain
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Analogue/Digital Conversion (AREA)
- Time-Division Multiplex Systems (AREA)
- Stereophonic System (AREA)
Abstract
EL SISTEMA DE CODIFICACION DE SEÑALES DE AUDIO DE BAJO RETARDO, QUE UTILIZA TECNICAS DE ANALISIS POR SINTESIS, CONSTA DE ELEMENTOS (AFC, AFD) PARA ADAPTAR LOS PARAMETROS ESPECTRALES Y EL ORDEN DE PREDICCION DE LOS FILTROS DE SINTESIS (SYC, SYD) DEL CODIFICADOR (CDA, CDB) Y DECODIFICADOR (DA, DB) Y LOS FILTROS DE PONDERACION PERCEPTUAL (FP) DEL CODIFICADOR EN CADA UNA IMAGEN, EMPEZANDO POR LA SEÑAL RECONSTRUIDA RELACIONADA CON LA IMAGEN PREVIA. EN EL CASO DE UN CODIFICADOR CELP, TAMBIEN HAY ELEMENTOS (AGC, AGD) PARA ADAPTAR, EMPEZANDO POR LA SEÑAL RECONSTRUIDA, UN FACTOR, ENLAZADO A ENERGIA MEDIA DE LA SEÑAL DE ENTRADA, DE LA GANANCIA MEDIANTE LA CUAL SE PONDERAN LOS VECTORES DE INNOVACION.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITTO920658A IT1257065B (it) | 1992-07-31 | 1992-07-31 | Codificatore a basso ritardo per segnali audio, utilizzante tecniche di analisi per sintesi. |
Publications (2)
Publication Number | Publication Date |
---|---|
ES2068172T1 true ES2068172T1 (es) | 1995-04-16 |
ES2068172T3 ES2068172T3 (es) | 1998-06-01 |
Family
ID=11410652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES93112293T Expired - Lifetime ES2068172T3 (es) | 1992-07-31 | 1993-07-30 | Codificador de bajo retardo para señales de audio, que utiliza tecnicas de analisis por sintesis. |
Country Status (9)
Country | Link |
---|---|
US (1) | US5321793A (es) |
EP (1) | EP0582921B1 (es) |
JP (1) | JPH0683395A (es) |
AT (1) | ATE165183T1 (es) |
CA (1) | CA2101700C (es) |
DE (2) | DE582921T1 (es) |
ES (1) | ES2068172T3 (es) |
GR (2) | GR950300011T1 (es) |
IT (1) | IT1257065B (es) |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0751496B1 (en) * | 1992-06-29 | 2000-04-19 | Nippon Telegraph And Telephone Corporation | Speech coding method and apparatus for the same |
AU675322B2 (en) * | 1993-04-29 | 1997-01-30 | Unisearch Limited | Use of an auditory model to improve quality or lower the bit rate of speech synthesis systems |
US5550543A (en) * | 1994-10-14 | 1996-08-27 | Lucent Technologies Inc. | Frame erasure or packet loss compensation method |
FR2734389B1 (fr) * | 1995-05-17 | 1997-07-18 | Proust Stephane | Procede d'adaptation du niveau de masquage du bruit dans un codeur de parole a analyse par synthese utilisant un filtre de ponderation perceptuelle a court terme |
JP3680380B2 (ja) * | 1995-10-26 | 2005-08-10 | ソニー株式会社 | 音声符号化方法及び装置 |
FR2742568B1 (fr) * | 1995-12-15 | 1998-02-13 | Catherine Quinquis | Procede d'analyse par prediction lineaire d'un signal audiofrequence, et procedes de codage et de decodage d'un signal audiofrequence en comportant application |
JP3092653B2 (ja) * | 1996-06-21 | 2000-09-25 | 日本電気株式会社 | 広帯域音声符号化装置及び音声復号装置並びに音声符号化復号装置 |
US5751901A (en) * | 1996-07-31 | 1998-05-12 | Qualcomm Incorporated | Method for searching an excitation codebook in a code excited linear prediction (CELP) coder |
GB2318029B (en) * | 1996-10-01 | 2000-11-08 | Nokia Mobile Phones Ltd | Audio coding method and apparatus |
JP3266178B2 (ja) * | 1996-12-18 | 2002-03-18 | 日本電気株式会社 | 音声符号化装置 |
EP0878790A1 (en) * | 1997-05-15 | 1998-11-18 | Hewlett-Packard Company | Voice coding system and method |
SE9903553D0 (sv) | 1999-01-27 | 1999-10-01 | Lars Liljeryd | Enhancing percepptual performance of SBR and related coding methods by adaptive noise addition (ANA) and noise substitution limiting (NSL) |
FI116992B (fi) * | 1999-07-05 | 2006-04-28 | Nokia Corp | Menetelmät, järjestelmä ja laitteet audiosignaalin koodauksen ja siirron tehostamiseksi |
US7260523B2 (en) * | 1999-12-21 | 2007-08-21 | Texas Instruments Incorporated | Sub-band speech coding system |
SE0001926D0 (sv) | 2000-05-23 | 2000-05-23 | Lars Liljeryd | Improved spectral translation/folding in the subband domain |
US7050545B2 (en) * | 2001-04-12 | 2006-05-23 | Tallabs Operations, Inc. | Methods and apparatus for echo cancellation using an adaptive lattice based non-linear processor |
US8605911B2 (en) | 2001-07-10 | 2013-12-10 | Dolby International Ab | Efficient and scalable parametric stereo coding for low bitrate audio coding applications |
SE0202159D0 (sv) | 2001-07-10 | 2002-07-09 | Coding Technologies Sweden Ab | Efficientand scalable parametric stereo coding for low bitrate applications |
WO2003046891A1 (en) | 2001-11-29 | 2003-06-05 | Coding Technologies Ab | Methods for improving high frequency reconstruction |
SE0202770D0 (sv) | 2002-09-18 | 2002-09-18 | Coding Technologies Sweden Ab | Method for reduction of aliasing introduces by spectral envelope adjustment in real-valued filterbanks |
US7619995B1 (en) * | 2003-07-18 | 2009-11-17 | Nortel Networks Limited | Transcoders and mixers for voice-over-IP conferencing |
ATE521143T1 (de) * | 2005-02-23 | 2011-09-15 | Ericsson Telefon Ab L M | Adaptive bitzuweisung für die mehrkanal- audiokodierung |
PL2118889T3 (pl) * | 2007-03-05 | 2013-03-29 | Ericsson Telefon Ab L M | Sposób i sterownik do wygładzania stacjonarnego szumu tła |
EP2212884B1 (en) * | 2007-11-06 | 2013-01-02 | Nokia Corporation | An encoder |
WO2009059632A1 (en) * | 2007-11-06 | 2009-05-14 | Nokia Corporation | An encoder |
CA2717584C (en) * | 2008-03-04 | 2015-05-12 | Lg Electronics Inc. | Method and apparatus for processing an audio signal |
CN102057424B (zh) * | 2008-06-13 | 2015-06-17 | 诺基亚公司 | 用于经编码的音频数据的错误隐藏的方法和装置 |
CA2862715C (en) * | 2009-10-20 | 2017-10-17 | Ralf Geiger | Multi-mode audio codec and celp coding adapted therefore |
US20120029926A1 (en) | 2010-07-30 | 2012-02-02 | Qualcomm Incorporated | Systems, methods, apparatus, and computer-readable media for dependent-mode coding of audio signals |
US9208792B2 (en) | 2010-08-17 | 2015-12-08 | Qualcomm Incorporated | Systems, methods, apparatus, and computer-readable media for noise injection |
US9626983B2 (en) | 2014-06-26 | 2017-04-18 | Qualcomm Incorporated | Temporal gain adjustment based on high-band signal characteristic |
ES2664348T3 (es) | 2014-07-29 | 2018-04-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Estimación de ruido de fondo en señales de audio |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5921039U (ja) * | 1982-07-30 | 1984-02-08 | いすゞ自動車株式会社 | 内燃機関 |
JPS6097743A (ja) * | 1983-11-02 | 1985-05-31 | Canon Inc | 適応型線形予測装置 |
CA2005115C (en) * | 1989-01-17 | 1997-04-22 | Juin-Hwey Chen | Low-delay code-excited linear predictive coder for speech or audio |
JPH02214899A (ja) * | 1989-02-15 | 1990-08-27 | Matsushita Electric Ind Co Ltd | 音声符号化装置 |
IT1232084B (it) * | 1989-05-03 | 1992-01-23 | Cselt Centro Studi Lab Telecom | Sistema di codifica per segnali audio a banda allargata |
JP2939999B2 (ja) * | 1989-05-24 | 1999-08-25 | 日本電気株式会社 | 可変長フレーム型ボコーダ |
IT1241358B (it) * | 1990-12-20 | 1994-01-10 | Sip | Sistema di codifica del segnale vocale con sottocodice annidato |
US5233660A (en) * | 1991-09-10 | 1993-08-03 | At&T Bell Laboratories | Method and apparatus for low-delay celp speech coding and decoding |
-
1992
- 1992-07-31 IT ITTO920658A patent/IT1257065B/it active IP Right Grant
-
1993
- 1993-05-21 US US08/065,990 patent/US5321793A/en not_active Expired - Fee Related
- 1993-06-15 JP JP5167370A patent/JPH0683395A/ja active Pending
- 1993-07-30 EP EP93112293A patent/EP0582921B1/en not_active Expired - Lifetime
- 1993-07-30 AT AT93112293T patent/ATE165183T1/de active
- 1993-07-30 DE DE0582921T patent/DE582921T1/de active Pending
- 1993-07-30 ES ES93112293T patent/ES2068172T3/es not_active Expired - Lifetime
- 1993-07-30 CA CA002101700A patent/CA2101700C/en not_active Expired - Fee Related
- 1993-07-30 DE DE69317958T patent/DE69317958T2/de not_active Expired - Fee Related
-
1995
- 1995-03-31 GR GR950300011T patent/GR950300011T1/el unknown
-
1998
- 1998-04-16 GR GR980400728T patent/GR3026673T3/el unknown
Also Published As
Publication number | Publication date |
---|---|
CA2101700C (en) | 1997-02-25 |
EP0582921A3 (en) | 1995-01-04 |
CA2101700A1 (en) | 1994-02-01 |
ES2068172T3 (es) | 1998-06-01 |
GR3026673T3 (en) | 1998-07-31 |
EP0582921B1 (en) | 1998-04-15 |
ITTO920658A1 (it) | 1994-01-31 |
US5321793A (en) | 1994-06-14 |
ITTO920658A0 (it) | 1992-07-31 |
ATE165183T1 (de) | 1998-05-15 |
GR950300011T1 (en) | 1995-03-31 |
JPH0683395A (ja) | 1994-03-25 |
DE69317958D1 (de) | 1998-05-20 |
DE69317958T2 (de) | 1998-09-17 |
EP0582921A2 (en) | 1994-02-16 |
DE582921T1 (de) | 1995-06-08 |
IT1257065B (it) | 1996-01-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
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