MX9606368A - Metodo y aparato para codificar y decodificar a baja velocidad. - Google Patents
Metodo y aparato para codificar y decodificar a baja velocidad.Info
- Publication number
- MX9606368A MX9606368A MX9606368A MX9606368A MX9606368A MX 9606368 A MX9606368 A MX 9606368A MX 9606368 A MX9606368 A MX 9606368A MX 9606368 A MX9606368 A MX 9606368A MX 9606368 A MX9606368 A MX 9606368A
- Authority
- MX
- Mexico
- Prior art keywords
- codeword
- index
- prequantizer
- quantizer
- low rate
- Prior art date
Links
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
Un sistema para la codificacion o la decodificacion de baja velocidad que incluye el uso de un indicador de modo en la señal codificada para indicar si se está enviando informacion de precuantificador (es decir, gruesa) o de cuantificador (es decir, fina). En una modalidad de transmisor (300) se efectua la busqueda de las palabras codigo de precuantificador ("P") y de cuantificador ("V") tanto de un precuantificador (212) como de un cuantificador restringido (214), respectivamente, para determinar las palabras codigo con la menor energía residual. (El índice de la palabra codigo P o V con el menor residuo se determina entonces (220) y, este índice se transmite junto con un indicador de modo P o V apropiado. En una modalidad de receptor (330), el indicador de modo se utiliza para ajustar al decodificador (por ejemplo, un vocodificador) (350) para formar una replica de señal de una palabra codigo P (determinada del índice transmitido) o, de una palabra codigo V (del índice V transmitido) y la palabra codigo P previamente determinada (por ejemplo, el centroide de la palabra codigo V).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US42478095A | 1995-04-19 | 1995-04-19 | |
| PCT/US1996/003235 WO1996034383A1 (en) | 1995-04-19 | 1996-03-07 | Method and apparatus for low rate coding and decoding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MX9606368A true MX9606368A (es) | 1997-03-29 |
Family
ID=23683842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MX9606368A MX9606368A (es) | 1995-04-19 | 1996-03-07 | Metodo y aparato para codificar y decodificar a baja velocidad. |
Country Status (14)
| Country | Link |
|---|---|
| JP (1) | JPH10503633A (es) |
| CN (1) | CN1150853A (es) |
| AU (1) | AU683058B2 (es) |
| BR (1) | BR9606292A (es) |
| CA (1) | CA2191972A1 (es) |
| DE (1) | DE19680399T1 (es) |
| FI (1) | FI965131A0 (es) |
| FR (1) | FR2733345B1 (es) |
| GB (1) | GB2304508A (es) |
| IT (1) | IT1285178B1 (es) |
| MX (1) | MX9606368A (es) |
| PL (1) | PL318012A1 (es) |
| SE (1) | SE9604443L (es) |
| WO (1) | WO1996034383A1 (es) |
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 DE DE19680399T patent/DE19680399T1/de not_active Ceased
- 1996-03-07 GB GB9625742A patent/GB2304508A/en not_active Withdrawn
- 1996-03-07 AU AU66349/96A patent/AU683058B2/en not_active Ceased
- 1996-03-07 CN CN96190352.XA patent/CN1150853A/zh active Pending
- 1996-03-07 JP JP8532495A patent/JPH10503633A/ja active Pending
- 1996-03-07 PL PL96318012A patent/PL318012A1/xx unknown
- 1996-03-07 BR BR9606292A patent/BR9606292A/pt unknown
- 1996-03-07 WO PCT/US1996/003235 patent/WO1996034383A1/en active Application Filing
- 1996-03-07 CA CA002191972A patent/CA2191972A1/en not_active Abandoned
- 1996-03-07 MX MX9606368A patent/MX9606368A/es unknown
- 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 |
|---|---|
| GB2304508A (en) | 1997-03-19 |
| GB9625742D0 (en) | 1997-01-29 |
| AU683058B2 (en) | 1997-10-30 |
| DE19680399T1 (de) | 1997-09-18 |
| FI965131A (fi) | 1996-12-19 |
| FI965131A0 (fi) | 1996-12-19 |
| FR2733345B1 (fr) | 1997-07-25 |
| FR2733345A1 (fr) | 1996-10-25 |
| ITRM960235A1 (it) | 1997-10-15 |
| PL318012A1 (en) | 1997-05-12 |
| SE9604443D0 (sv) | 1996-12-03 |
| JPH10503633A (ja) | 1998-03-31 |
| SE9604443L (sv) | 1997-02-19 |
| WO1996034383A1 (en) | 1996-10-31 |
| ITRM960235A0 (es) | 1996-04-15 |
| AU6634996A (en) | 1996-11-18 |
| BR9606292A (pt) | 1997-11-18 |
| CA2191972A1 (en) | 1996-10-31 |
| CN1150853A (zh) | 1997-05-28 |
| IT1285178B1 (it) | 1998-06-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| MX9602432A (es) | Metodo y aparato para controlar la operacion de un descodificador de señal en un sistema de transmision. | |
| EP0961414A3 (en) | Method and apparatus for encoding, decoding and compression of audio-type data | |
| CA2220965A1 (en) | Method and apparatus for determining coding rate in a wireless communication system | |
| HK1012112A1 (en) | Intensity-stereo encoding and decoding in a transmission system | |
| CA2167527A1 (en) | Sub-band coder with differentially encoded scale factors | |
| NO981532L (no) | FremgangsmÕte og innretning for koding av lydsignaler | |
| AU2211102A (en) | Acoustic communication system | |
| AU7044294A (en) | Transmitting and receiving apparatus and method including punctured convolutional encoding and decoding | |
| DE3751271D1 (de) | System zur Übertragung. | |
| AU677676B2 (en) | Apparatus and method for coding/decoding subtitles data | |
| EP0764941A3 (en) | Speech signal quantization using human auditory models in predictive coding systems | |
| DE60028579D1 (de) | Verfahren und system zur sprachkodierung bei ausfall von datenrahmen | |
| NO20001177L (no) | Fremgangsmõte og system for digital signaloverføring | |
| TW376497B (en) | Transmission system for transmitting a main signal and an auxiliary signal | |
| WO2000008409A3 (en) | Laser frequency modulation tactical training system | |
| EP0798888A3 (en) | Method and apparatus for digital communication with error encoding according to division of data in classes | |
| TW357496B (en) | Receiver decoder circuitry and associated method for decoding an encoded signal | |
| GB2258374A (en) | Adjusting the level of an audio signal | |
| MX9606368A (es) | Metodo y aparato para codificar y decodificar a baja velocidad. | |
| EP0229379A3 (en) | Digital picture signal coding/decoding circuit | |
| EP0393952A3 (en) | Apparatus and method for proper decoding in an encoder/decoder | |
| WO1996036041A3 (en) | Transmission system and method for encoding speech with improved pitch detection | |
| CA2025455A1 (en) | Speech coding system with generation of linear predictive coding parameters and control codes from a digital speech signal | |
| FR2395559A1 (fr) | Dispositif d'assistance aux grands handicapes | |
| GB9124331D0 (en) | Voice-band digital signals |