EP0801790A1 - Verfahren zur sprachkodierung mittels analyse durch synthese - Google Patents
Verfahren zur sprachkodierung mittels analyse durch syntheseInfo
- Publication number
- EP0801790A1 EP0801790A1 EP96901010A EP96901010A EP0801790A1 EP 0801790 A1 EP0801790 A1 EP 0801790A1 EP 96901010 A EP96901010 A EP 96901010A EP 96901010 A EP96901010 A EP 96901010A EP 0801790 A1 EP0801790 A1 EP 0801790A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frame
- filter
- term
- short
- 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 claims abstract description 50
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims description 30
- 230000005284 excitation Effects 0.000 claims abstract description 44
- 230000004044 response Effects 0.000 claims abstract description 42
- 230000001419 dependent effect Effects 0.000 claims abstract description 3
- 238000012546 transfer Methods 0.000 claims description 12
- 230000003595 spectral effect Effects 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 3
- 230000007774 longterm Effects 0.000 description 33
- 230000001934 delay Effects 0.000 description 28
- 239000013598 vector Substances 0.000 description 28
- 238000011002 quantification Methods 0.000 description 22
- 239000011159 matrix material Substances 0.000 description 19
- 238000004364 calculation method Methods 0.000 description 18
- 238000012360 testing method Methods 0.000 description 16
- 230000005540 biological transmission Effects 0.000 description 15
- 238000013139 quantization Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 14
- 230000006870 function Effects 0.000 description 12
- 238000000354 decomposition reaction Methods 0.000 description 8
- 238000005457 optimization Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 7
- 230000003111 delayed effect Effects 0.000 description 7
- 230000003044 adaptive effect Effects 0.000 description 6
- 101100176198 Caenorhabditis elegans nst-1 gene Proteins 0.000 description 5
- 230000000717 retained effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000001755 vocal effect Effects 0.000 description 2
- 101100148606 Caenorhabditis elegans pst-1 gene Proteins 0.000 description 1
- UWNXGZKSIKQKAH-UHFFFAOYSA-N Cc1cc(CNC(CO)C(O)=O)c(OCc2cccc(c2)C#N)cc1OCc1cccc(c1C)-c1ccc2OCCOc2c1 Chemical compound Cc1cc(CNC(CO)C(O)=O)c(OCc2cccc(c2)C#N)cc1OCc1cccc(c1C)-c1ccc2OCCOc2c1 UWNXGZKSIKQKAH-UHFFFAOYSA-N 0.000 description 1
- 101000822695 Clostridium perfringens (strain 13 / Type A) Small, acid-soluble spore protein C1 Proteins 0.000 description 1
- 101000655262 Clostridium perfringens (strain 13 / Type A) Small, acid-soluble spore protein C2 Proteins 0.000 description 1
- 101000655256 Paraclostridium bifermentans Small, acid-soluble spore protein alpha Proteins 0.000 description 1
- 101000655264 Paraclostridium bifermentans Small, acid-soluble spore protein beta Proteins 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 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
- G10L19/04—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
- G10L19/083—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being an excitation gain
-
- 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
- G10L19/10—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a multipulse excitation
-
- 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
-
- 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
- G10L2019/0011—Long term prediction filters, i.e. pitch estimation
-
- 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
- G10L2019/0012—Smoothing of parameters of the decoder interpolation
-
- 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
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
- G10L25/24—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being the cepstrum
-
- 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
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/93—Discriminating between voiced and unvoiced parts of speech signals
Definitions
- a linear prediction of the speech signal is carried out in order to obtain the coefficients of a short-term synthesis filter modeling the transfer function of the vocal tract. These coefficients are transmitted to the decoder, as well as parameters characterizing an excitation to be applied to the short-term synthesis filter.
- further research is carried out on the longer-term correlations of the speech signal in order to characterize a long-term synthesis filter accounting for the pitch of the speech.
- the excitation indeed has a predictable component which can be represented by the past excitation, delayed by TP samples of the speech signal and affected by a gain g p .
- the long-term prediction delay is determined in two stages.
- the open loop LTP analysis module 36 detects the voiced frames of the speech signal and determines, for each voiced frame, a degree of voicing MV and a search interval for the long-term prediction delay.
- the search interval is defined by a central value represented by its quantization index ZP and by a width in the domain of the quantification indexes, depending on the degree of voicing MV.
- n -L,; / ') - ⁇ L (k', j , ).
Landscapes
- Engineering & Computer Science (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9500135 | 1995-01-06 | ||
| FR9500135A FR2729247A1 (fr) | 1995-01-06 | 1995-01-06 | Procede de codage de parole a analyse par synthese |
| PCT/FR1996/000006 WO1996021220A1 (fr) | 1995-01-06 | 1996-01-03 | Procede de codage de parole a analyse par synthese |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0801790A1 true EP0801790A1 (de) | 1997-10-22 |
| EP0801790B1 EP0801790B1 (de) | 1999-05-12 |
Family
ID=9474932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96901010A Expired - Lifetime EP0801790B1 (de) | 1995-01-06 | 1996-01-03 | Verfahren zur sprachkodierung mittels analyse durch synthese |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US5963898A (de) |
| EP (1) | EP0801790B1 (de) |
| CN (1) | CN1173938A (de) |
| AT (1) | ATE180092T1 (de) |
| AU (1) | AU697892B2 (de) |
| BR (1) | BR9606887A (de) |
| CA (1) | CA2209623A1 (de) |
| DE (1) | DE69602421T2 (de) |
| FR (1) | FR2729247A1 (de) |
| WO (1) | WO1996021220A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111587457A (zh) * | 2017-11-10 | 2020-08-25 | 弗劳恩霍夫应用研究促进协会 | 信号滤波 |
| US11562754B2 (en) | 2017-11-10 | 2023-01-24 | Fraunhofer-Gesellschaft Zur F Rderung Der Angewandten Forschung E.V. | Analysis/synthesis windowing function for modulated lapped transformation |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3134817B2 (ja) * | 1997-07-11 | 2001-02-13 | 日本電気株式会社 | 音声符号化復号装置 |
| JP3998330B2 (ja) * | 1998-06-08 | 2007-10-24 | 沖電気工業株式会社 | 符号化装置 |
| US6192335B1 (en) * | 1998-09-01 | 2001-02-20 | Telefonaktieboiaget Lm Ericsson (Publ) | Adaptive combining of multi-mode coding for voiced speech and noise-like signals |
| CA2252170A1 (en) | 1998-10-27 | 2000-04-27 | Bruno Bessette | A method and device for high quality coding of wideband speech and audio signals |
| FI116992B (fi) * | 1999-07-05 | 2006-04-28 | Nokia Corp | Menetelmät, järjestelmä ja laitteet audiosignaalin koodauksen ja siirron tehostamiseksi |
| JP3372908B2 (ja) * | 1999-09-17 | 2003-02-04 | エヌイーシーマイクロシステム株式会社 | マルチパルス探索処理方法と音声符号化装置 |
| GB2357683A (en) * | 1999-12-24 | 2001-06-27 | Nokia Mobile Phones Ltd | Voiced/unvoiced determination for speech coding |
| US6760698B2 (en) * | 2000-09-15 | 2004-07-06 | Mindspeed Technologies Inc. | System for coding speech information using an adaptive codebook with enhanced variable resolution scheme |
| US7171355B1 (en) | 2000-10-25 | 2007-01-30 | Broadcom Corporation | Method and apparatus for one-stage and two-stage noise feedback coding of speech and audio signals |
| FR2820227B1 (fr) * | 2001-01-30 | 2003-04-18 | France Telecom | Procede et dispositif de reduction de bruit |
| FI114770B (fi) * | 2001-05-21 | 2004-12-15 | Nokia Corp | Matkaviestimen äänidatan kontrollointi solukkojärjestelmässä |
| US7110942B2 (en) * | 2001-08-14 | 2006-09-19 | Broadcom Corporation | Efficient excitation quantization in a noise feedback coding system using correlation techniques |
| US6751587B2 (en) | 2002-01-04 | 2004-06-15 | Broadcom Corporation | Efficient excitation quantization in noise feedback coding with general noise shaping |
| US7206740B2 (en) * | 2002-01-04 | 2007-04-17 | Broadcom Corporation | Efficient excitation quantization in noise feedback coding with general noise shaping |
| US20030135374A1 (en) * | 2002-01-16 | 2003-07-17 | Hardwick John C. | Speech synthesizer |
| US20040098255A1 (en) * | 2002-11-14 | 2004-05-20 | France Telecom | Generalized analysis-by-synthesis speech coding method, and coder implementing such method |
| US8473286B2 (en) * | 2004-02-26 | 2013-06-25 | Broadcom Corporation | Noise feedback coding system and method for providing generalized noise shaping within a simple filter structure |
| FR2888699A1 (fr) * | 2005-07-13 | 2007-01-19 | France Telecom | Dispositif de codage/decodage hierachique |
| US8300849B2 (en) * | 2007-11-06 | 2012-10-30 | Microsoft Corporation | Perceptually weighted digital audio level compression |
| US9626982B2 (en) * | 2011-02-15 | 2017-04-18 | Voiceage Corporation | Device and method for quantizing the gains of the adaptive and fixed contributions of the excitation in a CELP codec |
| MX347921B (es) | 2012-10-05 | 2017-05-17 | Fraunhofer Ges Forschung | Un aparato para la codificacion de una señal de voz que emplea prediccion lineal excitada por codigos algebraico en el dominio de autocorrelacion. |
| US9336789B2 (en) * | 2013-02-21 | 2016-05-10 | Qualcomm Incorporated | Systems and methods for determining an interpolation factor set for synthesizing a speech signal |
| CN107452391B (zh) | 2014-04-29 | 2020-08-25 | 华为技术有限公司 | 音频编码方法及相关装置 |
Family Cites Families (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8302985A (nl) * | 1983-08-26 | 1985-03-18 | Philips Nv | Multipulse excitatie lineair predictieve spraakcodeerder. |
| CA1223365A (en) * | 1984-02-02 | 1987-06-23 | Shigeru Ono | Method and apparatus for speech coding |
| NL8500843A (nl) * | 1985-03-22 | 1986-10-16 | Koninkl Philips Electronics Nv | Multipuls-excitatie lineair-predictieve spraakcoder. |
| US4831624A (en) * | 1987-06-04 | 1989-05-16 | Motorola, Inc. | Error detection method for sub-band coding |
| US4802171A (en) * | 1987-06-04 | 1989-01-31 | Motorola, Inc. | Method for error correction in digitally encoded speech |
| CA1337217C (en) * | 1987-08-28 | 1995-10-03 | Daniel Kenneth Freeman | Speech coding |
| US5293448A (en) * | 1989-10-02 | 1994-03-08 | Nippon Telegraph And Telephone Corporation | Speech analysis-synthesis method and apparatus therefor |
| SE463691B (sv) * | 1989-05-11 | 1991-01-07 | Ericsson Telefon Ab L M | Foerfarande att utplacera excitationspulser foer en lineaerprediktiv kodare (lpc) som arbetar enligt multipulsprincipen |
| US5060269A (en) * | 1989-05-18 | 1991-10-22 | General Electric Company | Hybrid switched multi-pulse/stochastic speech coding technique |
| JP2940005B2 (ja) * | 1989-07-20 | 1999-08-25 | 日本電気株式会社 | 音声符号化装置 |
| US5097508A (en) * | 1989-08-31 | 1992-03-17 | Codex Corporation | Digital speech coder having improved long term lag parameter determination |
| ES2145737T5 (es) * | 1989-09-01 | 2007-03-01 | Motorola, Inc. | Codificador digital de voz con predictor a largo plazo mejorado por resolucion de submuestreos. |
| ATE177867T1 (de) * | 1989-10-17 | 1999-04-15 | Motorola Inc | Digitaler sprachdekodierer unter verwendung einer nachfilterung mit einer reduzierten spektralverzerrung |
| US5073940A (en) * | 1989-11-24 | 1991-12-17 | General Electric Company | Method for protecting multi-pulse coders from fading and random pattern bit errors |
| US5097507A (en) * | 1989-12-22 | 1992-03-17 | General Electric Company | Fading bit error protection for digital cellular multi-pulse speech coder |
| US5265219A (en) * | 1990-06-07 | 1993-11-23 | Motorola, Inc. | Speech encoder using a soft interpolation decision for spectral parameters |
| FI98104C (fi) * | 1991-05-20 | 1997-04-10 | Nokia Mobile Phones Ltd | Menetelmä herätevektorin generoimiseksi ja digitaalinen puhekooderi |
| US5253269A (en) * | 1991-09-05 | 1993-10-12 | Motorola, Inc. | Delta-coded lag information for use in a speech coder |
| DE69232166T2 (de) * | 1991-09-05 | 2002-06-06 | Motorola Inc., Schaumburg | Fehlerschutz für vielfachmodensprachkodierer |
| TW224191B (de) * | 1992-01-28 | 1994-05-21 | Qualcomm Inc | |
| US5765127A (en) * | 1992-03-18 | 1998-06-09 | Sony Corp | High efficiency encoding method |
| US5495555A (en) * | 1992-06-01 | 1996-02-27 | Hughes Aircraft Company | High quality low bit rate celp-based speech codec |
| US5317595A (en) * | 1992-06-30 | 1994-05-31 | Nokia Mobile Phones Ltd. | Rapidly adaptable channel equalizer |
| JP3343965B2 (ja) * | 1992-10-31 | 2002-11-11 | ソニー株式会社 | 音声符号化方法及び復号化方法 |
| IT1264766B1 (it) * | 1993-04-09 | 1996-10-04 | Sip | Codificatore della voce utilizzante tecniche di analisi con un'eccitazione a impulsi. |
| EP0657874B1 (de) * | 1993-12-10 | 2001-03-14 | Nec Corporation | Stimmkodierer und Verfahren zum Suchen von Kodebüchern |
| FR2720850B1 (fr) * | 1994-06-03 | 1996-08-14 | Matra Communication | Procédé de codage de parole à prédiction linéaire. |
| FR2720849B1 (fr) * | 1994-06-03 | 1996-08-14 | Matra Communication | Procédé et dispositif de prétraitement d'un signal acoustique en amont d'un codeur de parole. |
| CA2154911C (en) * | 1994-08-02 | 2001-01-02 | Kazunori Ozawa | Speech coding device |
| US5699477A (en) * | 1994-11-09 | 1997-12-16 | Texas Instruments Incorporated | Mixed excitation linear prediction with fractional pitch |
| US5751903A (en) * | 1994-12-19 | 1998-05-12 | Hughes Electronics | Low rate multi-mode CELP codec that encodes line SPECTRAL frequencies utilizing an offset |
| FR2729245B1 (fr) * | 1995-01-06 | 1997-04-11 | Lamblin Claude | Procede de codage de parole a prediction lineaire et excitation par codes algebriques |
| US5732389A (en) * | 1995-06-07 | 1998-03-24 | Lucent Technologies Inc. | Voiced/unvoiced classification of speech for excitation codebook selection in celp speech decoding during frame erasures |
| 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 |
| US5799271A (en) * | 1996-06-24 | 1998-08-25 | Electronics And Telecommunications Research Institute | Method for reducing pitch search time for vocoder |
-
1995
- 1995-01-06 FR FR9500135A patent/FR2729247A1/fr active Granted
-
1996
- 1996-01-03 AT AT96901010T patent/ATE180092T1/de active
- 1996-01-03 BR BR9606887A patent/BR9606887A/pt not_active Application Discontinuation
- 1996-01-03 US US08/860,746 patent/US5963898A/en not_active Expired - Lifetime
- 1996-01-03 EP EP96901010A patent/EP0801790B1/de not_active Expired - Lifetime
- 1996-01-03 DE DE69602421T patent/DE69602421T2/de not_active Expired - Fee Related
- 1996-01-03 AU AU44903/96A patent/AU697892B2/en not_active Ceased
- 1996-01-03 WO PCT/FR1996/000006 patent/WO1996021220A1/fr active IP Right Grant
- 1996-01-03 CA CA002209623A patent/CA2209623A1/en not_active Abandoned
- 1996-01-03 CN CN96191793A patent/CN1173938A/zh active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9621220A1 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111587457A (zh) * | 2017-11-10 | 2020-08-25 | 弗劳恩霍夫应用研究促进协会 | 信号滤波 |
| US11562754B2 (en) | 2017-11-10 | 2023-01-24 | Fraunhofer-Gesellschaft Zur F Rderung Der Angewandten Forschung E.V. | Analysis/synthesis windowing function for modulated lapped transformation |
| CN111587457B (zh) * | 2017-11-10 | 2023-05-12 | 弗劳恩霍夫应用研究促进协会 | 信号滤波 |
| US12033646B2 (en) | 2017-11-10 | 2024-07-09 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Analysis/synthesis windowing function for modulated lapped transformation |
Also Published As
| Publication number | Publication date |
|---|---|
| BR9606887A (pt) | 1997-10-28 |
| WO1996021220A1 (fr) | 1996-07-11 |
| FR2729247B1 (de) | 1997-03-07 |
| DE69602421T2 (de) | 1999-12-23 |
| ATE180092T1 (de) | 1999-05-15 |
| EP0801790B1 (de) | 1999-05-12 |
| FR2729247A1 (fr) | 1996-07-12 |
| CN1173938A (zh) | 1998-02-18 |
| AU697892B2 (en) | 1998-10-22 |
| AU4490396A (en) | 1996-07-24 |
| DE69602421D1 (de) | 1999-06-17 |
| US5963898A (en) | 1999-10-05 |
| CA2209623A1 (en) | 1996-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0801790B1 (de) | Verfahren zur sprachkodierung mittels analyse durch synthese | |
| EP0801788B1 (de) | Verfahren zur sprachkodierung mittels analyse durch synthese | |
| EP0782128B1 (de) | Verfahren zur Analyse eines Audiofrequenzsignals durch lineare Prädiktion, und Anwendung auf ein Verfahren zur Kodierung und Dekodierung eines Audiofrequenzsignals | |
| EP0721180B1 (de) | Sprachkodierung mittels Analyse durch Synthese | |
| EP0749626B1 (de) | Verfahren zur sprachkodierung mittels linearer prädiktion und anregung durch algebraische kodes | |
| FR2734389A1 (fr) | 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 | |
| EP1692689B1 (de) | Optimiertes mehrfach-codierungsverfahren | |
| EP1593116B1 (de) | Verfahren zur differenzierten digitalen Sprach- und Musikbearbeitung, Rauschfilterung, Erzeugung von Spezialeffekten und Einrichtung zum Ausführen des Verfahrens | |
| CN101180676A (zh) | 用于谱包络表示的向量量化的方法和设备 | |
| EP2080194B1 (de) | Dämpfung von stimmüberlagerung, im besonderen zur erregungserzeugung bei einem decoder in abwesenheit von informationen | |
| FR2784218A1 (fr) | Procede de codage de la parole a bas debit | |
| EP1192619B1 (de) | Audio-kodierung, dekodierung zur interpolation | |
| EP1192618B1 (de) | Audiokodierung mit adaptiver lifterung | |
| EP1192621B1 (de) | Audiokodierung mit harmonischen komponenten | |
| WO2002029786A1 (fr) | Procede et dispositif de codage segmental d'un signal audio | |
| EP1194923B1 (de) | Verfahren und system für audio analyse und synthese | |
| JP2001100799A (ja) | 音声符号化装置、音声符号化方法および音声符号化アルゴリズムを記録したコンピュータ読み取り可能な記録媒体 | |
| FR2980620A1 (fr) | Traitement d'amelioration de la qualite des signaux audiofrequences decodes | |
| WO2013135997A1 (fr) | Modification des caractéristiques spectrales d'un filtre de prédiction linéaire d'un signal audionumérique représenté par ses coefficients lsf ou isf | |
| WO2001003119A1 (fr) | Codage et decodage audio incluant des composantes non harmoniques du signal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19970725 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE GB IT LI LU NL PT SE |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: MATRA NORTEL COMMUNICATIONS |
|
| 17Q | First examination report despatched |
Effective date: 19980826 |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE GB IT LI LU NL PT SE |
|
| REF | Corresponds to: |
Ref document number: 180092 Country of ref document: AT Date of ref document: 19990515 Kind code of ref document: T |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: MAUC, MICHEL Inventor name: NAVARRO, WILLIAM |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
| REF | Corresponds to: |
Ref document number: 69602421 Country of ref document: DE Date of ref document: 19990617 |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19990622 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: KELLER & PARTNER PATENTANWAELTE AG |
|
| REG | Reference to a national code |
Ref country code: PT Ref legal event code: SC4A Free format text: AVAILABILITY OF NATIONAL TRANSLATION Effective date: 19990729 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000103 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000103 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000131 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000131 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000131 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| BERE | Be: lapsed |
Owner name: MATRA NORTEL COMMUNICATIONS Effective date: 20000131 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000801 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20000801 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20001218 Year of fee payment: 6 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010731 |
|
| REG | Reference to a national code |
Ref country code: PT Ref legal event code: MM4A Free format text: LAPSE DUE TO NON-PAYMENT OF FEES Effective date: 20010731 |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020104 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 96901010.7 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20040130 Year of fee payment: 9 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050103 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050802 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000103 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20141230 Year of fee payment: 20 |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20160102 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20160102 |