ES2131498T3 - Decodificador digital de voz que tiene un postfiltro con distorsion espectral reducida. - Google Patents
Decodificador digital de voz que tiene un postfiltro con distorsion espectral reducida.Info
- Publication number
- ES2131498T3 ES2131498T3 ES90913916T ES90913916T ES2131498T3 ES 2131498 T3 ES2131498 T3 ES 2131498T3 ES 90913916 T ES90913916 T ES 90913916T ES 90913916 T ES90913916 T ES 90913916T ES 2131498 T3 ES2131498 T3 ES 2131498T3
- Authority
- ES
- Spain
- Prior art keywords
- postfilter
- digital voice
- spectral distortion
- voice decoder
- denominator
- 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.)
- Expired - Lifetime
Links
- 230000003595 spectral effect Effects 0.000 title abstract 4
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 230000002411 adverse Effects 0.000 abstract 1
- 238000009499 grossing Methods 0.000 abstract 1
- 238000000034 method Methods 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
- G10L19/04—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
- G10L19/26—Pre-filtering or post-filtering
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)
- Filters That Use Time-Delay Elements (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
UN POSTFILTRO ESPECTRAL ADAPTABLE (108) COLOCADO EN UNA PLATAFORMA DE VOZ SINTETIZADA QUE TIENE UNA CARACTERISTICA DE DENOMINADOR CORRESPONDIENTE A UNA FASE DE FILTRO LPC PRECEDENTE (106) Y UNA CARACTERISTICA DE NUMERADOR QUE SE DESARROLLA COMO UNA FUNCION DE LA CARACTERISTICA DE DENOMINADOR POR MEDIO DE LA APLICACION DE TECNICAS DE FILTRADO ESPECTRAL. ESTO PERMITE AL NUMERADOR SEGUIR AL DENOMINADOR SIN LA INTRODUCCION DE DISTORSIONES ESPECTRALES QUE DE OTRO MODO AFECTARIAN AL PROCESAMIENTO DE FORMA DESFAVORABLE.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US42292689A | 1989-10-17 | 1989-10-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2131498T3 true ES2131498T3 (es) | 1999-08-01 |
Family
ID=23676980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES90913916T Expired - Lifetime ES2131498T3 (es) | 1989-10-17 | 1990-09-17 | Decodificador digital de voz que tiene un postfiltro con distorsion espectral reducida. |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0570362B1 (es) |
JP (1) | JP3158434B2 (es) |
CN (1) | CN1078371C (es) |
AT (1) | ATE177867T1 (es) |
AU (1) | AU635342B2 (es) |
DE (1) | DE69033011T2 (es) |
ES (1) | ES2131498T3 (es) |
WO (1) | WO1991006093A1 (es) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2729244B1 (fr) * | 1995-01-06 | 1997-03-28 | Matra Communication | Procede de codage de parole a analyse par synthese |
FR2729246A1 (fr) * | 1995-01-06 | 1996-07-12 | Matra Communication | Procede de codage de parole a analyse par synthese |
FR2729247A1 (fr) * | 1995-01-06 | 1996-07-12 | Matra Communication | Procede de codage de parole a analyse par synthese |
JP2993396B2 (ja) * | 1995-05-12 | 1999-12-20 | 三菱電機株式会社 | 音声加工フィルタ及び音声合成装置 |
DE19643900C1 (de) * | 1996-10-30 | 1998-02-12 | Ericsson Telefon Ab L M | Nachfiltern von Hörsignalen, speziell von Sprachsignalen |
US6137844A (en) * | 1998-02-02 | 2000-10-24 | Oki Telecom, Inc. | Digital filter for noise and error removal in transmitted analog signals |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4301329A (en) * | 1978-01-09 | 1981-11-17 | Nippon Electric Co., Ltd. | Speech analysis and synthesis apparatus |
US4617676A (en) * | 1984-09-04 | 1986-10-14 | At&T Bell Laboratories | Predictive communication system filtering arrangement |
JP2535833B2 (ja) * | 1986-07-03 | 1996-09-18 | 日本電気株式会社 | 集積回路 |
US4852169A (en) * | 1986-12-16 | 1989-07-25 | GTE Laboratories, Incorporation | Method for enhancing the quality of coded speech |
US4969192A (en) * | 1987-04-06 | 1990-11-06 | Voicecraft, Inc. | Vector adaptive predictive coder for speech and audio |
US4817157A (en) * | 1988-01-07 | 1989-03-28 | Motorola, Inc. | Digital speech coder having improved vector excitation source |
-
1990
- 1990-09-17 EP EP90913916A patent/EP0570362B1/en not_active Expired - Lifetime
- 1990-09-17 DE DE69033011T patent/DE69033011T2/de not_active Expired - Lifetime
- 1990-09-17 ES ES90913916T patent/ES2131498T3/es not_active Expired - Lifetime
- 1990-09-17 WO PCT/US1990/005190 patent/WO1991006093A1/en active IP Right Grant
- 1990-09-17 AT AT90913916T patent/ATE177867T1/de not_active IP Right Cessation
- 1990-09-17 JP JP51307390A patent/JP3158434B2/ja not_active Expired - Lifetime
- 1990-09-17 AU AU64114/90A patent/AU635342B2/en not_active Expired
- 1990-10-15 CN CN90108435.2A patent/CN1078371C/zh not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CN1078371C (zh) | 2002-01-23 |
EP0570362B1 (en) | 1999-03-17 |
AU6411490A (en) | 1991-05-16 |
JPH05500573A (ja) | 1993-02-04 |
ATE177867T1 (de) | 1999-04-15 |
CN1051101A (zh) | 1991-05-01 |
WO1991006093A1 (en) | 1991-05-02 |
AU635342B2 (en) | 1993-03-18 |
EP0570362A1 (en) | 1993-11-24 |
DE69033011T2 (de) | 2001-10-04 |
EP0570362A4 (en) | 1993-07-01 |
DE69033011D1 (de) | 1999-04-22 |
JP3158434B2 (ja) | 2001-04-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
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