ES2065524T3 - Codificador, descodificador, y codificador/descodificador de transformacion con tiempo de retardo corto para alta calidad de audio. - Google Patents

Codificador, descodificador, y codificador/descodificador de transformacion con tiempo de retardo corto para alta calidad de audio.

Info

Publication number
ES2065524T3
ES2065524T3 ES90903695T ES90903695T ES2065524T3 ES 2065524 T3 ES2065524 T3 ES 2065524T3 ES 90903695 T ES90903695 T ES 90903695T ES 90903695 T ES90903695 T ES 90903695T ES 2065524 T3 ES2065524 T3 ES 2065524T3
Authority
ES
Spain
Prior art keywords
length values
fixed
decoder
variable
bits
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
ES90903695T
Other languages
English (en)
Inventor
Louis Dunn Fielder
Mark Franklin Davis
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27404960&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES2065524(T3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US07/458,894 external-priority patent/US5109417A/en
Application filed by Dolby Laboratories Licensing Corp filed Critical Dolby Laboratories Licensing Corp
Application granted granted Critical
Publication of ES2065524T3 publication Critical patent/ES2065524T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • 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
    • G10L19/0212—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 using orthogonal transformation
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/005—Statistical coding, e.g. Huffman, run length coding
    • 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)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Computational Linguistics (AREA)
  • Human Computer Interaction (AREA)
  • Theoretical Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Acoustics & Sound (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Analogue/Digital Conversion (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Error Detection And Correction (AREA)

Abstract

UN SISTEMA CODIFICADOR/DECODIFICADOR DE TRANSFORMACION (44.1 KHZ O DE 48 KHZ DE PROPORCION DE MUESTREO) DE BAJA VELOCIDAD DE BITS (192 KBITS POR SEGUNDO) PARA APLICACIONES EN EQUIPOS MUSICALES DE ALTA CALIDAD QUE EMPLEA BLOQUES DE MUESTRA EN EL DOMINIO DE CORTA DURACION (128 BLOQUES DE MUESTRA) DE FORMA QUE EL RETRASO DE LA PROPAGACION DE LAS SEÑALES DEL SISTEMA ES LO SUFICIENTEMENTE CORTO PARA LA RETROALIMENTACION AUDITIVA EN TIEMPO REAL DE UN OPERARIO HUMANO. SE UTILIZAN PARES DE VENTANAS DE ANALISIS/SINTESIS DISEÑADAS CUIDADOSAMENTE PARA ALCANZAR SUFICIENTE SELECTIVIDAD DE FRECUENCIA DE TRANSFORMACION A PESAR DE UTILIZAR BLOQUES DE MUESTRA CORTOS. UNA VENTANA DE SINTESIS EN EL DECODIFICADOR TIENE CARACTERISTICAS TALES QUE EL PRODUCTO DE SU RESPUESTA Y DE LA VENTANA DE ANALISIS EN EL CODIFICADOR PRODUCE UNA RESPUESTA COMPUESTA QUE SE SUMA A UNA UNIDAD DE DOS BLOQUES DE MUESTRA SUPERPUESTOS ADYACENTES. LOS BLOQUES DE MUESTRA DE SEÑAL DE DOMINIO-TIEMPO ADYACENTES SE SOBREPONEN Y SE AÑADEN PARA CANCELAR LOS EFECTOS DE LAS VENTANAS DE SINTESIS Y ANALISIS. SE PROPORCIONA UNA TECNICA PARA DERIVAR PARES DE VENTANAS DE ANALISIS/SINTESIS IDONEAS. EN EL CODIFICADOR SE UTILIZA UNA TRANSFORMACION DISCRETA PROVISTA DE UNA FUNCION EQUIVALENTE A LA APLICACION ALTERNATIVA DE UNA TRANSFORMADA DISCRETA DE COSENO Y DE SENO MODIFICADAS DE ACUERDO CON LA TECNICA DE CANCELACION DE ALIAS DEL DOMINIO TIEMPO, O ALTERNATIVAMENTE, UNA TRANSFORMADA DISCRETA DE FOURIER PARA GENERAR COEFICIENTES DE TRANSFORMADA DE DOMINIO-FRECUENCIA. LOS COEFICIENTES DE TRANSFORMADA SE CUANTIFICAN NO UNIFORMEMENTE ASIGNANDOLES UN NUMERO FIJO DE BITS Y UN NUMERO VARIABLE DE BITS DETERMINADOS BASADOS POR ADAPTACION EN UNA MASCARA PSICOACUSTICA. SE DESCRIBE UNA TECNICA PARA ASIGNAR EL BIT FIJO Y LAS SITUACIONES DE LOS BITS ADAPTADOS. NO SE REQUIERE LA TRANSMISION DE INFORMACION LATERAL EN RELACION CON LOS BITS SITUADOS ADAPTABLEMENTE. LOS CODIGOS DE ERROR Y LOS DATOS PROTEGIDOS PUEDEN DISPERSARSE COMPLETAMENTE A TRAVES DESALIDAS DE BASTIDOR FORMATEADAS DESDE EL CODIFICADOR A FIN DE REDUCIR LA SENSIBILIDAD A LAS EXPLOSIONES DE RUIDOS.
ES90903695T 1989-01-27 1990-01-29 Codificador, descodificador, y codificador/descodificador de transformacion con tiempo de retardo corto para alta calidad de audio. Expired - Lifetime ES2065524T3 (es)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US30371489A 1989-01-27 1989-01-27
US43986889A 1989-11-20 1989-11-20
US07/458,894 US5109417A (en) 1989-01-27 1989-12-29 Low bit rate transform coder, decoder, and encoder/decoder for high-quality audio

Publications (1)

Publication Number Publication Date
ES2065524T3 true ES2065524T3 (es) 1995-02-16

Family

ID=27404960

Family Applications (2)

Application Number Title Priority Date Filing Date
ES94107838T Expired - Lifetime ES2119932T3 (es) 1989-01-27 1990-01-29 Formateo de señal codificada para codificador y descodificador de sistema de audio de alta calidad.
ES90903695T Expired - Lifetime ES2065524T3 (es) 1989-01-27 1990-01-29 Codificador, descodificador, y codificador/descodificador de transformacion con tiempo de retardo corto para alta calidad de audio.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
ES94107838T Expired - Lifetime ES2119932T3 (es) 1989-01-27 1990-01-29 Formateo de señal codificada para codificador y descodificador de sistema de audio de alta calidad.

Country Status (12)

Country Link
EP (2) EP0610975B1 (es)
JP (2) JP2811369B2 (es)
KR (4) KR100220861B1 (es)
AT (2) ATE116495T1 (es)
AU (1) AU643677B2 (es)
BR (1) BR9007062A (es)
CA (5) CA2332407C (es)
DE (2) DE69015613T2 (es)
DK (2) DK0447495T3 (es)
ES (2) ES2119932T3 (es)
SG (1) SG82549A1 (es)
WO (1) WO1990009064A1 (es)

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Also Published As

Publication number Publication date
WO1990009064A1 (en) 1990-08-09
ES2119932T3 (es) 1998-10-16
CA2332407C (en) 2002-03-05
ATE170682T1 (de) 1998-09-15
KR100214252B1 (ko) 2000-03-15
CA2026207C (en) 1995-04-11
AU5156390A (en) 1990-08-24
CA2026213C (en) 1995-04-04
EP0610975A2 (en) 1994-08-17
DE69015613D1 (de) 1995-02-09
DK0610975T3 (da) 1999-05-31
CA2332407A1 (en) 1990-07-28
KR910700526A (ko) 1991-03-15
SG82549A1 (en) 2001-08-21
CA2026207A1 (en) 1990-07-28
KR100220862B1 (ko) 1999-09-15
JPH1188185A (ja) 1999-03-30
DE69032624T2 (de) 1999-03-25
CA2140678C (en) 2001-05-01
ATE116495T1 (de) 1995-01-15
DK0447495T3 (da) 1995-04-24
AU643677B2 (en) 1993-11-25
BR9007062A (pt) 1991-10-08
DE69032624D1 (de) 1998-10-08
KR920702100A (ko) 1992-08-12
JPH04503136A (ja) 1992-06-04
KR100220861B1 (ko) 1999-09-15
EP0447495A1 (en) 1991-09-25
JP3093179B2 (ja) 2000-10-03
EP0447495B1 (en) 1994-12-28
JP2811369B2 (ja) 1998-10-15
EP0610975B1 (en) 1998-09-02
DE69015613T2 (de) 1995-05-24
CA2026213A1 (en) 1991-05-21
EP0610975A3 (en) 1994-12-14
KR19990037843A (ko) 1999-05-25
KR100214253B1 (ko) 2000-03-15
CA2140678A1 (en) 1990-07-28
CA2340610C (en) 2002-03-05

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