IT1232084B - Sistema di codifica per segnali audio a banda allargata - Google Patents
Sistema di codifica per segnali audio a banda allargataInfo
- Publication number
- IT1232084B IT1232084B IT8967317A IT6731789A IT1232084B IT 1232084 B IT1232084 B IT 1232084B IT 8967317 A IT8967317 A IT 8967317A IT 6731789 A IT6731789 A IT 6731789A IT 1232084 B IT1232084 B IT 1232084B
- Authority
- IT
- Italy
- Prior art keywords
- audio signals
- wide band
- coding system
- band audio
- coding
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
- H04B1/667—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission using a division in frequency subbands
-
- 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
- G10L19/002—Dynamic bit allocation
-
- 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
- G10L19/0204—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 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
- G10L19/08—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 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
- G10L19/08—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
- G10L19/113—Regular pulse excitation
-
- 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
- G10L19/08—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 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
- G10L2019/0001—Codebooks
- G10L2019/0011—Long term prediction filters, i.e. pitch estimation
-
- 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
- G10L2019/0001—Codebooks
- G10L2019/0013—Codebook search algorithms
- G10L2019/0014—Selection criteria for distances
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
- G10L25/06—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 correlation coefficients
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT8967317A IT1232084B (it) | 1989-05-03 | 1989-05-03 | Sistema di codifica per segnali audio a banda allargata |
DE69028434T DE69028434T2 (de) | 1989-05-03 | 1990-05-02 | System zur Codierung von Breitbandaudiosignalen |
EP90108332A EP0396121B1 (en) | 1989-05-03 | 1990-05-02 | A system for coding wide-band audio signals |
DE199090108332T DE396121T1 (de) | 1989-05-03 | 1990-05-02 | System zur codierung von breitbandaudiosignalen. |
CA002016042A CA2016042C (en) | 1989-05-03 | 1990-05-03 | System for coding wide-bank audio signals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT8967317A IT1232084B (it) | 1989-05-03 | 1989-05-03 | Sistema di codifica per segnali audio a banda allargata |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8967317A0 IT8967317A0 (it) | 1989-05-03 |
IT1232084B true IT1232084B (it) | 1992-01-23 |
Family
ID=11301410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT8967317A IT1232084B (it) | 1989-05-03 | 1989-05-03 | Sistema di codifica per segnali audio a banda allargata |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0396121B1 (it) |
CA (1) | CA2016042C (it) |
DE (2) | DE69028434T2 (it) |
IT (1) | IT1232084B (it) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5754976A (en) * | 1990-02-23 | 1998-05-19 | Universite De Sherbrooke | Algebraic codebook with signal-selected pulse amplitude/position combinations for fast coding of speech |
DE69229974T2 (de) * | 1991-02-26 | 2000-07-20 | Nec Corp | Verfahren und Vorrichtung zur Kodierung von Sprachparametern |
IT1257065B (it) * | 1992-07-31 | 1996-01-05 | Sip | Codificatore a basso ritardo per segnali audio, utilizzante tecniche di analisi per sintesi. |
US5717824A (en) * | 1992-08-07 | 1998-02-10 | Pacific Communication Sciences, Inc. | Adaptive speech coder having code excited linear predictor with multiple codebook searches |
IT1257431B (it) * | 1992-12-04 | 1996-01-16 | Sip | Procedimento e dispositivo per la quantizzazione dei guadagni dell'eccitazione in codificatori della voce basati su tecniche di analisi per sintesi |
BE1007617A3 (nl) * | 1993-10-11 | 1995-08-22 | Philips Electronics Nv | Transmissiesysteem met gebruik van verschillende codeerprincipes. |
US5506908A (en) * | 1994-06-30 | 1996-04-09 | At&T Corp. | Directional microphone system |
JPH09506478A (ja) * | 1994-10-06 | 1997-06-24 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | 光放射半導体ダイオード及びこのようなダイオードの製造方法 |
JP2842276B2 (ja) * | 1995-02-24 | 1998-12-24 | 日本電気株式会社 | 広帯域信号符号化装置 |
TW321810B (it) * | 1995-10-26 | 1997-12-01 | Sony Co Ltd | |
FI114248B (fi) | 1997-03-14 | 2004-09-15 | Nokia Corp | Menetelmä ja laite audiokoodaukseen ja audiodekoodaukseen |
GB2326572A (en) * | 1997-06-19 | 1998-12-23 | Softsound Limited | Low bit rate audio coder and decoder |
JP3199020B2 (ja) | 1998-02-27 | 2001-08-13 | 日本電気株式会社 | 音声音楽信号の符号化装置および復号装置 |
FI113571B (fi) * | 1998-03-09 | 2004-05-14 | Nokia Corp | Puheenkoodaus |
JP5154934B2 (ja) * | 2004-09-17 | 2013-02-27 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 知覚的歪みを最小化する結合オーディオ符号化 |
MY153562A (en) * | 2008-07-11 | 2015-02-27 | Fraunhofer Ges Forschung | Method and discriminator for classifying different segments of a signal |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5921039B2 (ja) * | 1981-11-04 | 1984-05-17 | 日本電信電話株式会社 | 適応予測符号化方式 |
DE3276651D1 (en) * | 1982-11-26 | 1987-07-30 | Ibm | Speech signal coding method and apparatus |
DE3688980T2 (de) * | 1986-10-30 | 1994-04-21 | Ibm | Verfahren zur Multigeschwindigkeitskodierung von Signalen und Einrichtung zur Durchführung dieses Verfahrens. |
-
1989
- 1989-05-03 IT IT8967317A patent/IT1232084B/it active
-
1990
- 1990-05-02 DE DE69028434T patent/DE69028434T2/de not_active Expired - Lifetime
- 1990-05-02 DE DE199090108332T patent/DE396121T1/de active Pending
- 1990-05-02 EP EP90108332A patent/EP0396121B1/en not_active Expired - Lifetime
- 1990-05-03 CA CA002016042A patent/CA2016042C/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69028434D1 (de) | 1996-10-17 |
IT8967317A0 (it) | 1989-05-03 |
EP0396121A1 (en) | 1990-11-07 |
DE69028434T2 (de) | 1997-02-20 |
CA2016042A1 (en) | 1990-11-03 |
CA2016042C (en) | 1998-04-28 |
DE396121T1 (de) | 1991-03-21 |
EP0396121B1 (en) | 1996-09-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19950419 |