CA2191972A1 - Procede et dispositif de codage et decodage a faible debit binaire - Google Patents
Procede et dispositif de codage et decodage a faible debit binaireInfo
- Publication number
- CA2191972A1 CA2191972A1 CA002191972A CA2191972A CA2191972A1 CA 2191972 A1 CA2191972 A1 CA 2191972A1 CA 002191972 A CA002191972 A CA 002191972A CA 2191972 A CA2191972 A CA 2191972A CA 2191972 A1 CA2191972 A1 CA 2191972A1
- Authority
- CA
- Canada
- Prior art keywords
- codeword
- quantizer
- prequantizer
- index
- signal
- 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.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims description 22
- 239000013598 vector Substances 0.000 claims description 58
- 238000004891 communication Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims 2
- 230000000875 corresponding effect Effects 0.000 description 12
- 230000003595 spectral effect Effects 0.000 description 8
- 238000013459 approach Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000004075 alteration Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000010267 cellular communication Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000026683 transduction Effects 0.000 description 1
- 238000010361 transduction 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
- G10L19/02—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
- G10L19/032—Quantisation or dequantisation of spectral components
- G10L19/038—Vector quantisation, e.g. TwinVQ audio
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Computational Linguistics (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Executing Machine-Instructions (AREA)
Abstract
Système destiné à un codage ou décodage à faible débit binaire, comportant l'utilisation d'un indicateur de mode dans le signal codé pour indiquer s'il est envoyé une information émanant d'un préquantificateur (c'est-à-dire grossière) ou d'un quantificateur (c'est-à-dire fine). Dans un mode de réalisation d'émetteur (300), on fait une recherche de préquantificateur (212) et une recherche restreinte de quantificateur (214) sur les mots de code prédéfinis d'un préquantificateur ("P") et d'un quantificateur ("V"), respectivement, afin de déterminer les mots de code ayant l'énergie résiduelle la plus faible. L'indice du mot de code P ou V ayant la plus petite énergie résiduelle est ensuite déterminé (220), puis transmis en même temps qu'un indicateur de mode P ou V approprié. Dans un mode de réalisation de récepteur (330), l'indicateur de mode est utilisé pour régler le décodeur (par exemple un vocodeur) (350) en sorte de former une réplique du signal à partir d'un mot de code P (déterminé à partir de l'indice transmis) ou à partir d'un mot de code V (à partir de l'indice transmis) et d'un mot de code P préalablement déterminé (par exemple le point médian du mot de code V).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US42478095A | 1995-04-19 | 1995-04-19 | |
| US08/424,780 | 1995-04-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2191972A1 true CA2191972A1 (fr) | 1996-10-31 |
Family
ID=23683842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002191972A Abandoned CA2191972A1 (fr) | 1995-04-19 | 1996-03-07 | Procede et dispositif de codage et decodage a faible debit binaire |
Country Status (14)
| Country | Link |
|---|---|
| JP (1) | JPH10503633A (fr) |
| CN (1) | CN1150853A (fr) |
| AU (1) | AU683058B2 (fr) |
| BR (1) | BR9606292A (fr) |
| CA (1) | CA2191972A1 (fr) |
| DE (1) | DE19680399T1 (fr) |
| FI (1) | FI965131A0 (fr) |
| FR (1) | FR2733345B1 (fr) |
| GB (1) | GB2304508A (fr) |
| IT (1) | IT1285178B1 (fr) |
| MX (1) | MX9606368A (fr) |
| PL (1) | PL318012A1 (fr) |
| SE (1) | SE9604443L (fr) |
| WO (1) | WO1996034383A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9454974B2 (en) | 2006-07-31 | 2016-09-27 | Qualcomm Incorporated | Systems, methods, and apparatus for gain factor limiting |
| CN104637483A (zh) * | 2015-02-03 | 2015-05-20 | 中国电子科技集团公司第五十八研究所 | 基于多通道的低速率语音编解码系统 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE6901749U (de) * | 1969-01-17 | 1969-05-22 | Huettenwerke Siegerland Ag | Diffusor fuer bundgluehoefen |
| JPH02287399A (ja) * | 1989-04-28 | 1990-11-27 | Fujitsu Ltd | ベクトル量子化制御方式 |
| US5010574A (en) * | 1989-06-13 | 1991-04-23 | At&T Bell Laboratories | Vector quantizer search arrangement |
| US4974099A (en) * | 1989-06-21 | 1990-11-27 | International Mobile Machines Corporation | Communication signal compression system and method |
| US4963030A (en) * | 1989-11-29 | 1990-10-16 | California Institute Of Technology | Distributed-block vector quantization coder |
| FR2709366B1 (fr) * | 1993-03-26 | 2001-09-14 | Motorola Inc | Procédé de stockage de vecteurs de coefficient de réflexion. |
-
1996
- 1996-03-07 CA CA002191972A patent/CA2191972A1/fr not_active Abandoned
- 1996-03-07 CN CN96190352.XA patent/CN1150853A/zh active Pending
- 1996-03-07 MX MX9606368A patent/MX9606368A/es unknown
- 1996-03-07 WO PCT/US1996/003235 patent/WO1996034383A1/fr active Application Filing
- 1996-03-07 DE DE19680399T patent/DE19680399T1/de not_active Ceased
- 1996-03-07 PL PL96318012A patent/PL318012A1/xx unknown
- 1996-03-07 BR BR9606292A patent/BR9606292A/pt unknown
- 1996-03-07 JP JP8532495A patent/JPH10503633A/ja active Pending
- 1996-03-07 AU AU66349/96A patent/AU683058B2/en not_active Ceased
- 1996-03-07 GB GB9625742A patent/GB2304508A/en not_active Withdrawn
- 1996-03-27 FR FR9603787A patent/FR2733345B1/fr not_active Expired - Fee Related
- 1996-04-15 IT IT96RM000235A patent/IT1285178B1/it active IP Right Grant
- 1996-12-03 SE SE9604443A patent/SE9604443L/xx not_active Application Discontinuation
- 1996-12-19 FI FI965131A patent/FI965131A0/fi unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ITRM960235A0 (fr) | 1996-04-15 |
| SE9604443D0 (sv) | 1996-12-03 |
| DE19680399T1 (de) | 1997-09-18 |
| AU6634996A (en) | 1996-11-18 |
| JPH10503633A (ja) | 1998-03-31 |
| IT1285178B1 (it) | 1998-06-03 |
| SE9604443L (sv) | 1997-02-19 |
| BR9606292A (pt) | 1997-11-18 |
| ITRM960235A1 (it) | 1997-10-15 |
| FI965131A (fi) | 1996-12-19 |
| PL318012A1 (en) | 1997-05-12 |
| AU683058B2 (en) | 1997-10-30 |
| MX9606368A (es) | 1997-03-29 |
| WO1996034383A1 (fr) | 1996-10-31 |
| FR2733345B1 (fr) | 1997-07-25 |
| GB9625742D0 (en) | 1997-01-29 |
| FR2733345A1 (fr) | 1996-10-25 |
| FI965131A0 (fi) | 1996-12-19 |
| GB2304508A (en) | 1997-03-19 |
| CN1150853A (zh) | 1997-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11990147B2 (en) | Adaptive transition frequency between noise fill and bandwidth extension | |
| AU716982B2 (en) | Method for signalling a noise substitution during audio signal coding | |
| US5692102A (en) | Method device and system for an efficient noise injection process for low bitrate audio compression | |
| EP1904999B1 (fr) | Segmentation de frequence permettant d'obtenir des bandes de codage efficace de donnees multimedia numeriques | |
| EP1905000B1 (fr) | Utilisation selective de plusieurs modeles entropiques pour le codage et le decodage adaptatifs | |
| JP3782103B2 (ja) | アダプティブディザを減算し、埋没チャンネルビットを挿入し、フィルタリングすることによりマルチビット符号ディジタル音声を符号化する方法及び装置、及びこの方法のための符号化及び復号化装置。 | |
| KR100732659B1 (ko) | 가변 비트 레이트 광대역 스피치 음성 코딩시의 이득양자화를 위한 방법 및 장치 | |
| KR100871999B1 (ko) | 오디오 코딩 | |
| US7684981B2 (en) | Prediction of spectral coefficients in waveform coding and decoding | |
| CN101494055B (zh) | 用于码分多址无线系统的方法和装置 | |
| US20040267543A1 (en) | Support of a multichannel audio extension | |
| JP3378238B2 (ja) | ソフト適応性特性を含む音声コーディング | |
| US7756698B2 (en) | Sound decoder and sound decoding method with demultiplexing order determination | |
| US20050091044A1 (en) | Method and system for pitch contour quantization in audio coding | |
| Gardner et al. | QCELP: A variable rate speech coder for CDMA digital cellular | |
| EP0375551A2 (fr) | Système de codage et de décodage de la parole | |
| JP3396480B2 (ja) | 多重モード音声コーダのためのエラー保護 | |
| Honda et al. | Bit allocation in time and frequency domains for predictive coding of speech | |
| AU717993B2 (en) | Adaptive transform coding system, adaptive transform decoding system and adaptive transform coding/decoding system | |
| CA2340160A1 (fr) | Codage de la parole avec reproduction amelioree du bruit de fond | |
| CA2191972A1 (fr) | Procede et dispositif de codage et decodage a faible debit binaire | |
| US8195469B1 (en) | Device, method, and program for encoding/decoding of speech with function of encoding silent period | |
| JP2000020099A (ja) | 線形予測分析器，コード励振線形予測符号器及びコード励振線形予測復号器 | |
| Mainard | A Low-Delay Encoding Scheme | |
| JPH0728500A (ja) | 音声符号器及び音声復号器 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |