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
Application number
ES94923506T
Other languages
English (en)
Inventor
Louis Dunn Fielder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dolby Laboratories Licensing Corp
Original Assignee
Dolby Laboratories Licensing Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US08/145,975 external-priority patent/US5632003A/en
Priority claimed from US08/190,655 external-priority patent/US5623577A/en
Application filed by Dolby Laboratories Licensing Corp filed Critical Dolby Laboratories Licensing Corp
Application granted granted Critical
Publication of ES2098974T3 publication Critical patent/ES2098974T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/66Details 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
    • H04B1/665Details 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.
ES94923506T 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. Expired - Lifetime ES2098974T3 (es)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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

Similar Documents

Publication Publication Date Title
ATE147909T1 (de) Vom rechenaufwand her effiziente adaptive bitzuteilung für kodierverfahren und kodiereinrichtung
SG54317A1 (en) Computationally efficient adaptive bit allocation for coding method and apparatus
US6502069B1 (en) Method and a device for coding audio signals and a method and a device for decoding a bit stream
KR100304055B1 (ko) 음성 신호 부호화동안 잡음 대체를 신호로 알리는 방법
US5621856A (en) Digital encoder with dynamic quantization bit allocation
EP1101289B1 (en) Method for inserting auxiliary data in an audio data stream
EP1701452B1 (en) System and method for masking quantization noise of audio signals
KR20000076297A (ko) 오디오신호 코딩방법
EP0740428A1 (en) Tonality for perceptual audio compression based on loudness uncertainty
US5781586A (en) Method and apparatus for encoding the information, method and apparatus for decoding the information and information recording medium
ES2098974T3 (es) Asignacion adaptativa computacionalmente eficaz de bitios para metodo de codificacion y aparato que permite distorsiones espectrales en la descodificacion.
EP0398973B1 (en) Method and apparatus for electrical signal coding
KR970006827B1 (ko) 오디오신호 부호화장치
GB2269967A (en) Audio data compression
JP3152114B2 (ja) オーディオ信号の符号化装置及び復号化装置

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 709006

Country of ref document: ES