ES2098974T3 - Asignacion adaptativa computacionalmente eficaz de bitios para metodo de codificacion y aparato que permite distorsiones espectrales en la descodificacion. - Google Patents
Asignacion adaptativa computacionalmente eficaz de bitios para metodo de codificacion y aparato que permite distorsiones espectrales en la descodificacion.Info
- Publication number
- ES2098974T3 ES2098974T3 ES94923506T ES94923506T ES2098974T3 ES 2098974 T3 ES2098974 T3 ES 2098974T3 ES 94923506 T ES94923506 T ES 94923506T ES 94923506 T ES94923506 T ES 94923506T ES 2098974 T3 ES2098974 T3 ES 2098974T3
- Authority
- ES
- Spain
- Prior art keywords
- allocation
- function
- subband signals
- values
- psychoacoustic
- 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
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
- H04B1/665—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 psychoacoustic properties of the ear, e.g. masking effect
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
LA INVENCION SE REFIERE EN GENERAL A LA CODIFICACION Y DECODIFICACION DE INFORMACION A BAJA VELOCIDAD DE TRAFICO DE BITS, TAL COMO INFORMACION DE AUDIO. EN PARTICULAR, LA INVENCION SE REFIERE A UNA DISTRIBUCION DE BITS Y CUANTIFICACION ADAPTABLES DE ALTO RENDIMIENTO COMPUTACIONAL DE LA INFORMACION CODIFICADA UTILES EN SISTEMAS DE CODIFICACION A BAJA VELOCIDAD DE TRAFICO DE BITS DE ALTA CALIDAD. EN APLICACIONES DE AUDIO, UN CODIFICADOR DE BANDA DIVIDIDA DIGITAL DIVIDE UNA SEÑAL DE ENTRADA EN SEÑALES DE SUBBANDA DE FRECUENCIA QUE TIENEN UNOS ANCHOS DE BANDA PROPORCIONADOS CON LOS ANCHOS DE BANDA CRITICOS DEL SISTEMA AUDITIVO HUMANO, CUANTIFICA LAS SEÑALES DE SUBBANDA SEGUN LOS VALORES ESTABLECIDOS POR UNA FUNCION DE DISTRIBUCION Y AGRUPA LAS SEÑALES DE SUBBANDA CUANTIFICADAS EN UNA SEÑAL CODIFICADA. LA FUNCION DE DISTRIBUCION ESTABLECE VALORES DE DISTRIBUCION SEGUN UNOS PRINCIPIOS PSICOACUSTICOS DANDO CABIDA A LAS DISTORSIONES ESPECTRALES LONGITUDINALES DE UN FILTRO DE SINTESIS DEL DECODIFICADOR. EN UN ASPECTO DE LA INVENCION, UNA FUNCION DE DISTRIBUCION ESTABLECE UNOS VALORES DE DISTRIBUCION UTILIZANDO UN UMBRAL DE ENMASCARAMIENTO PSICOACUSTICO GENERADO MEDIANTE LA ESTIMACION DE LA DENSIDAD ESPECTRAL DE POTENCIA (PSD) DE LA SEÑAL DE ENTRADA, GENERANDO UN PATRON DE EXCITACION MEDIANTE LA APLICACION DE UNA FUNCION DE PROPAGACION POR MEMBRANA BASILAR A LA PSD, AJUSTANDO EL PATRON DE EXCITACION EN UNA CANTIDAD IGUAL A UNA FUNCION DE SENSIBILIDAD QUE ESPECIFICA UNA RELACION DE SEÑAL A RUIDO (SNR) SUFICIENTE COMO PARA CONSEGUIR UN ENMASCARAMIENTO PSICOACUSTICO, COMPARANDO EL NIVEL DEL PATRON AJUSTADO CON EL UMBRAL DE ESCUCHA Y GENERANDO EL UMBRAL DE ENMASCARAMIENTO PSICOACUSTICO DE MODO QUE SEA IGUAL AL MAYOR DE LOS DOS. UNA FUNCION DE DISTRIBUCION PUEDE DAR CABIDA A LAS DISTORSIONES ESPECTRALES HORIZONTALES DE UN FILTRO DE SINTESIS DEL DECODIFICADOR DE MUCHAS MANERAS, TALES COMO ADAPTANDO LA FUNCION DE SENSIBILIDAD.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US9226993A | 1993-07-16 | 1993-07-16 | |
| US08/145,975 US5632003A (en) | 1993-07-16 | 1993-11-01 | Computationally efficient adaptive bit allocation for coding method and apparatus |
| US08/190,655 US5623577A (en) | 1993-07-16 | 1994-01-28 | Computationally efficient adaptive bit allocation for encoding method and apparatus with allowance for decoder spectral distortions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2098974T3 true ES2098974T3 (es) | 1997-05-01 |
Family
ID=27377179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES94923506T Expired - Lifetime ES2098974T3 (es) | 1993-07-16 | 1994-07-15 | Asignacion adaptativa computacionalmente eficaz de bitios para metodo de codificacion y aparato que permite distorsiones espectrales en la descodificacion. |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0709006B1 (es) |
| JP (1) | JP3297050B2 (es) |
| AT (1) | ATE149766T1 (es) |
| AU (1) | AU677688B2 (es) |
| CA (1) | CA2165450C (es) |
| DE (1) | DE69401959T2 (es) |
| DK (1) | DK0709006T3 (es) |
| ES (1) | ES2098974T3 (es) |
| SG (1) | SG66294A1 (es) |
| WO (1) | WO1995002929A1 (es) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0722225A3 (de) * | 1994-11-17 | 2000-06-07 | Deutsche Thomson-Brandt Gmbh | Audiosignalkodierung mittels Kurzzeitspektren und einem psychoakustischen Modell |
| US6363338B1 (en) * | 1999-04-12 | 2002-03-26 | Dolby Laboratories Licensing Corporation | Quantization in perceptual audio coders with compensation for synthesis filter noise spreading |
| EP1470550B1 (en) * | 2002-01-30 | 2008-09-03 | Matsushita Electric Industrial Co., Ltd. | Audio encoding and decoding device and methods thereof |
| AU2003242903A1 (en) * | 2002-07-08 | 2004-01-23 | Koninklijke Philips Electronics N.V. | Audio processing |
| KR100738109B1 (ko) * | 2006-04-03 | 2007-07-12 | 삼성전자주식회사 | 입력 신호의 양자화 및 역양자화 방법과 장치, 입력신호의부호화 및 복호화 방법과 장치 |
| CN101425293B (zh) * | 2008-09-24 | 2011-06-08 | 天津大学 | 一种高效感知音频比特分配方法 |
| BR112015010023B1 (pt) | 2012-11-07 | 2021-10-19 | Dolby Laboratories Licensing Corporation | Codificador de áudio e método para codificar um sinal de áudio |
| KR102231756B1 (ko) | 2013-09-05 | 2021-03-30 | 마이클 안토니 스톤 | 오디오 신호의 부호화, 복호화 방법 및 장치 |
| JP6398607B2 (ja) | 2014-10-24 | 2018-10-03 | 富士通株式会社 | オーディオ符号化装置、オーディオ符号化方法、オーディオ符号化プログラム |
| CN113933590A (zh) * | 2020-07-14 | 2022-01-14 | 森兰信息科技（上海）有限公司 | 波的频谱的计算方法、系统、介质及装置 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2906646B2 (ja) * | 1990-11-09 | 1999-06-21 | 松下電器産業株式会社 | 音声帯域分割符号化装置 |
| JP4177300B2 (ja) | 2004-07-27 | 2008-11-05 | 三菱電機株式会社 | 電子ビーム表面処理方法、および電子ビーム表面処理装置 |
-
1994
- 1994-07-15 JP JP50474795A patent/JP3297050B2/ja not_active Expired - Lifetime
- 1994-07-15 AU AU73357/94A patent/AU677688B2/en not_active Expired
- 1994-07-15 DE DE69401959T patent/DE69401959T2/de not_active Expired - Lifetime
- 1994-07-15 ES ES94923506T patent/ES2098974T3/es not_active Expired - Lifetime
- 1994-07-15 SG SG1996008341A patent/SG66294A1/en unknown
- 1994-07-15 CA CA002165450A patent/CA2165450C/en not_active Expired - Lifetime
- 1994-07-15 DK DK94923506.3T patent/DK0709006T3/da active
- 1994-07-15 EP EP94923506A patent/EP0709006B1/en not_active Expired - Lifetime
- 1994-07-15 WO PCT/US1994/007976 patent/WO1995002929A1/en active IP Right Grant
- 1994-07-15 AT AT94923506T patent/ATE149766T1/de active
Also Published As
| Publication number | Publication date |
|---|---|
| ATE149766T1 (de) | 1997-03-15 |
| AU7335794A (en) | 1995-02-13 |
| DE69401959T2 (de) | 1997-07-31 |
| DK0709006T3 (da) | 1997-09-01 |
| AU677688B2 (en) | 1997-05-01 |
| SG66294A1 (en) | 1999-07-20 |
| EP0709006A1 (en) | 1996-05-01 |
| EP0709006B1 (en) | 1997-03-05 |
| WO1995002929A1 (en) | 1995-01-26 |
| DE69401959D1 (de) | 1997-04-10 |
| JPH09500502A (ja) | 1997-01-14 |
| JP3297050B2 (ja) | 2002-07-02 |
| CA2165450C (en) | 2005-10-11 |
| CA2165450A1 (en) | 1995-01-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG2A | Definitive protection |
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