GB2368761B - Speech codec and methods for generating a vector codebook and encoding/decoding speech signals - Google Patents
Speech codec and methods for generating a vector codebook and encoding/decoding speech signalsInfo
- Publication number
- GB2368761B GB2368761B GB0026463A GB0026463A GB2368761B GB 2368761 B GB2368761 B GB 2368761B GB 0026463 A GB0026463 A GB 0026463A GB 0026463 A GB0026463 A GB 0026463A GB 2368761 B GB2368761 B GB 2368761B
- Authority
- GB
- United Kingdom
- Prior art keywords
- speech
- codebooks
- vectors
- codebook
- encoding
- 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 - Fee Related
Links
- 239000013598 vector Substances 0.000 title abstract 10
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
- G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
- G10L19/07—Line spectrum pair [LSP] 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
- G10L2019/0007—Codebook element generation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Image Analysis (AREA)
- Image Processing (AREA)
- Machine Translation (AREA)
Abstract
A speech codec (100, 200) for a speech communications unit includes a set of at least two embedded vector codebooks 256,262 capable of representing an input speech signal by a series of vectors. The codebooks 256, 262 share at least some common vectors of the series of vectors. The speech codec includes means for classifying 252 an input speech signal by selecting one of the codebooks in conjunction with at least a portion of at least one other embedded vector codebook to represent the input speech signal. The speech codec provides the advantage that at least two embedded vector codebooks, having overlapping vectors, can represent both wideband and narrowband signals. This provides for a reduced memory requirement of the codebook, in a memory constrained speech unit. Methods of generating such a combined vector codebook and encoding /decoding speech signals related to the combined vector codebook are disclosed. Application to video codecs is also envisaged.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0026463A GB2368761B (en) | 2000-10-30 | 2000-10-30 | Speech codec and methods for generating a vector codebook and encoding/decoding speech signals |
AT01993000T ATE303647T1 (en) | 2000-10-30 | 2001-10-22 | VOICE CODEC AND METHOD FOR GENERATING A VECTOR CODEBOOK AND FOR CODING/DECODING VOICE SIGNALS |
AU2002215972A AU2002215972A1 (en) | 2000-10-30 | 2001-10-22 | Speech codec and method for generating a vector codebook and encoding/decoding speech signals |
EP01993000A EP1334485B1 (en) | 2000-10-30 | 2001-10-22 | Speech codec and method for generating a vector codebook and encoding/decoding speech signals |
DE60113144T DE60113144T2 (en) | 2000-10-30 | 2001-10-22 | LANGUAGE CODEC AND METHOD FOR GENERATING A VECTOR CODE BOOK AND COPYING / DECODING LANGUAGE SIGNALS |
PCT/EP2001/012403 WO2002037477A1 (en) | 2000-10-30 | 2001-10-22 | Speech codec and method for generating a vector codebook and encoding/decoding speech signals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0026463A GB2368761B (en) | 2000-10-30 | 2000-10-30 | Speech codec and methods for generating a vector codebook and encoding/decoding speech signals |
Publications (3)
Publication Number | Publication Date |
---|---|
GB0026463D0 GB0026463D0 (en) | 2000-12-13 |
GB2368761A GB2368761A (en) | 2002-05-08 |
GB2368761B true GB2368761B (en) | 2003-07-16 |
Family
ID=9902177
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0026463A Expired - Fee Related GB2368761B (en) | 2000-10-30 | 2000-10-30 | Speech codec and methods for generating a vector codebook and encoding/decoding speech signals |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1334485B1 (en) |
AT (1) | ATE303647T1 (en) |
AU (1) | AU2002215972A1 (en) |
DE (1) | DE60113144T2 (en) |
GB (1) | GB2368761B (en) |
WO (1) | WO2002037477A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0703795D0 (en) | 2007-02-27 | 2007-04-04 | Sepura Ltd | Speech encoding and decoding in communications systems |
CN110428847B (en) * | 2019-08-28 | 2021-08-24 | 南京梧桐微电子科技有限公司 | Line spectrum frequency parameter quantization bit distribution method and system |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0411655A2 (en) * | 1989-08-04 | 1991-02-06 | Fujitsu Limited | Vector quantization encoder and vector quantization decoder |
WO1995010760A2 (en) * | 1993-10-08 | 1995-04-20 | Comsat Corporation | Improved low bit rate vocoders and methods of operation therefor |
GB2300548A (en) * | 1995-05-02 | 1996-11-06 | Motorola Ltd | Vector quantization method for a communications system |
WO1997027578A1 (en) * | 1996-01-26 | 1997-07-31 | Motorola Inc. | Very low bit rate time domain speech analyzer for voice messaging |
WO1999065017A1 (en) * | 1998-06-09 | 1999-12-16 | Matsushita Electric Industrial Co., Ltd. | Speech coding apparatus and speech decoding apparatus |
WO2002023527A1 (en) * | 2000-09-15 | 2002-03-21 | Telefonaktiebolaget Lm Ericsson | Multi-channel signal encoding and decoding |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5621852A (en) * | 1993-12-14 | 1997-04-15 | Interdigital Technology Corporation | Efficient codebook structure for code excited linear prediction coding |
JP4132154B2 (en) * | 1997-10-23 | 2008-08-13 | ソニー株式会社 | Speech synthesis method and apparatus, and bandwidth expansion method and apparatus |
US5966688A (en) * | 1997-10-28 | 1999-10-12 | Hughes Electronics Corporation | Speech mode based multi-stage vector quantizer |
-
2000
- 2000-10-30 GB GB0026463A patent/GB2368761B/en not_active Expired - Fee Related
-
2001
- 2001-10-22 WO PCT/EP2001/012403 patent/WO2002037477A1/en active IP Right Grant
- 2001-10-22 DE DE60113144T patent/DE60113144T2/en not_active Expired - Lifetime
- 2001-10-22 EP EP01993000A patent/EP1334485B1/en not_active Expired - Lifetime
- 2001-10-22 AU AU2002215972A patent/AU2002215972A1/en not_active Abandoned
- 2001-10-22 AT AT01993000T patent/ATE303647T1/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0411655A2 (en) * | 1989-08-04 | 1991-02-06 | Fujitsu Limited | Vector quantization encoder and vector quantization decoder |
WO1995010760A2 (en) * | 1993-10-08 | 1995-04-20 | Comsat Corporation | Improved low bit rate vocoders and methods of operation therefor |
GB2300548A (en) * | 1995-05-02 | 1996-11-06 | Motorola Ltd | Vector quantization method for a communications system |
WO1997027578A1 (en) * | 1996-01-26 | 1997-07-31 | Motorola Inc. | Very low bit rate time domain speech analyzer for voice messaging |
WO1999065017A1 (en) * | 1998-06-09 | 1999-12-16 | Matsushita Electric Industrial Co., Ltd. | Speech coding apparatus and speech decoding apparatus |
WO2002023527A1 (en) * | 2000-09-15 | 2002-03-21 | Telefonaktiebolaget Lm Ericsson | Multi-channel signal encoding and decoding |
Non-Patent Citations (1)
Title |
---|
Int. Conf. Acoustics, Speech & Signal Processing (ICASSP-90) vol 1, pages 221-224 * |
Also Published As
Publication number | Publication date |
---|---|
ATE303647T1 (en) | 2005-09-15 |
GB2368761A (en) | 2002-05-08 |
GB0026463D0 (en) | 2000-12-13 |
DE60113144T2 (en) | 2006-06-14 |
DE60113144D1 (en) | 2005-10-06 |
WO2002037477A1 (en) | 2002-05-10 |
EP1334485B1 (en) | 2005-08-31 |
EP1334485A1 (en) | 2003-08-13 |
AU2002215972A1 (en) | 2002-05-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20081030 |