CA2060310C - Digital speech coder with vector excitation source having improved speech quality - Google Patents
Digital speech coder with vector excitation source having improved speech quality Download PDFInfo
- Publication number
- CA2060310C CA2060310C CA002060310A CA2060310A CA2060310C CA 2060310 C CA2060310 C CA 2060310C CA 002060310 A CA002060310 A CA 002060310A CA 2060310 A CA2060310 A CA 2060310A CA 2060310 C CA2060310 C CA 2060310C
- Authority
- CA
- Canada
- Prior art keywords
- excitation
- excitation signal
- signal
- candidate
- pitch
- 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
- 230000005284 excitation Effects 0.000 title claims abstract description 86
- 239000013598 vector Substances 0.000 title abstract description 27
- 238000000034 method Methods 0.000 claims description 17
- 230000006870 function Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010420 art technique Methods 0.000 description 1
- 230000003595 spectral effect Effects 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
- G10L13/00—Speech synthesis; Text to speech systems
-
- 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
- G10L2019/0004—Design or structure of the codebook
- G10L2019/0005—Multi-stage vector quantisation
-
- 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
- G10L2019/0013—Codebook search algorithms
Landscapes
- Engineering & Computer Science (AREA)
- Computational Linguistics (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Analogue/Digital Conversion (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US37054189A | 1989-06-23 | 1989-06-23 | |
| US370,541 | 1989-06-23 | ||
| PCT/US1990/002469 WO1991001545A1 (en) | 1989-06-23 | 1990-05-02 | Digital speech coder with vector excitation source having improved speech quality |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2060310A1 CA2060310A1 (en) | 1990-12-24 |
| CA2060310C true CA2060310C (en) | 2001-07-17 |
Family
ID=23460115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002060310A Expired - Lifetime CA2060310C (en) | 1989-06-23 | 1990-05-02 | Digital speech coder with vector excitation source having improved speech quality |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0484339B1 (pt) |
| KR (1) | KR950003557B1 (pt) |
| CN (1) | CN1023160C (pt) |
| AU (1) | AU638462B2 (pt) |
| BR (1) | BR9007467A (pt) |
| CA (1) | CA2060310C (pt) |
| DE (1) | DE69032026T2 (pt) |
| IL (1) | IL94119A (pt) |
| NZ (1) | NZ234180A (pt) |
| WO (1) | WO1991001545A1 (pt) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0451200A (ja) * | 1990-06-18 | 1992-02-19 | Fujitsu Ltd | 音声符号化方式 |
| JPH0451199A (ja) * | 1990-06-18 | 1992-02-19 | Fujitsu Ltd | 音声符号化・復号化方式 |
| IT1241358B (it) * | 1990-12-20 | 1994-01-10 | Sip | Sistema di codifica del segnale vocale con sottocodice annidato |
| JP2776050B2 (ja) * | 1991-02-26 | 1998-07-16 | 日本電気株式会社 | 音声符号化方式 |
| DE4315315A1 (de) * | 1993-05-07 | 1994-11-10 | Ant Nachrichtentech | Verfahren zur Vektorquantisierung insbesondere von Sprachsignalen |
| SG43128A1 (en) * | 1993-06-10 | 1997-10-17 | Oki Electric Ind Co Ltd | Code excitation linear predictive (celp) encoder and decoder |
| JP3224955B2 (ja) * | 1994-05-27 | 2001-11-05 | 株式会社東芝 | ベクトル量子化装置およびベクトル量子化方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1252568A (en) * | 1984-12-24 | 1989-04-11 | Kazunori Ozawa | Low bit-rate pattern encoding and decoding capable of reducing an information transmission rate |
| US4868867A (en) * | 1987-04-06 | 1989-09-19 | Voicecraft Inc. | Vector excitation speech or audio coder for transmission or storage |
| US4899385A (en) * | 1987-06-26 | 1990-02-06 | American Telephone And Telegraph Company | Code excited linear predictive vocoder |
-
1990
- 1990-04-18 IL IL9411990A patent/IL94119A/en not_active IP Right Cessation
- 1990-05-02 DE DE69032026T patent/DE69032026T2/de not_active Expired - Lifetime
- 1990-05-02 AU AU57359/90A patent/AU638462B2/en not_active Expired
- 1990-05-02 EP EP90908908A patent/EP0484339B1/en not_active Expired - Lifetime
- 1990-05-02 CA CA002060310A patent/CA2060310C/en not_active Expired - Lifetime
- 1990-05-02 WO PCT/US1990/002469 patent/WO1991001545A1/en active IP Right Grant
- 1990-05-02 KR KR1019910701947A patent/KR950003557B1/ko not_active IP Right Cessation
- 1990-05-02 BR BR909007467A patent/BR9007467A/pt not_active IP Right Cessation
- 1990-06-19 CN CN90103020A patent/CN1023160C/zh not_active Expired - Lifetime
- 1990-06-21 NZ NZ234180A patent/NZ234180A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CN1048278A (zh) | 1991-01-02 |
| EP0484339B1 (en) | 1998-02-04 |
| CA2060310A1 (en) | 1990-12-24 |
| NZ234180A (en) | 1993-11-25 |
| EP0484339A1 (en) | 1992-05-13 |
| EP0484339A4 (en) | 1993-05-05 |
| DE69032026T2 (de) | 1998-09-17 |
| IL94119A0 (en) | 1991-01-31 |
| KR920702787A (ko) | 1992-10-06 |
| CN1023160C (zh) | 1993-12-15 |
| WO1991001545A1 (en) | 1991-02-07 |
| AU5735990A (en) | 1991-02-22 |
| AU638462B2 (en) | 1993-07-01 |
| DE69032026D1 (de) | 1998-03-12 |
| BR9007467A (pt) | 1992-06-16 |
| KR950003557B1 (ko) | 1995-04-14 |
| IL94119A (en) | 1996-06-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |