ES2097061T3 - Codificador de subbanda con factores de escala codificados de forma diferencial - Google Patents

Codificador de subbanda con factores de escala codificados de forma diferencial

Info

Publication number
ES2097061T3
ES2097061T3 ES94927268T ES94927268T ES2097061T3 ES 2097061 T3 ES2097061 T3 ES 2097061T3 ES 94927268 T ES94927268 T ES 94927268T ES 94927268 T ES94927268 T ES 94927268T ES 2097061 T3 ES2097061 T3 ES 2097061T3
Authority
ES
Spain
Prior art keywords
input signal
coded representation
differential coded
scale factors
scaling factors
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
ES94927268T
Other languages
English (en)
Inventor
Craig Campbell Todd
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
Application filed by Dolby Laboratories Licensing Corp filed Critical Dolby Laboratories Licensing Corp
Application granted granted Critical
Publication of ES2097061T3 publication Critical patent/ES2097061T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L19/035—Scalar quantisation
    • 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
    • H04B1/667—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 a division in frequency subbands

Abstract

LA INVENCION SE REFIERE EN GENERAL A LA CODIFICACION Y DECODIFICACION A BAJA VELOCIDAD DE TRAFICO DE BITS DE INFORMACION TAL COMO INFORMACION DE AUDIO. DE MANERA MAS PARTICULAR, LA INVENCION SE REFIERE A UN METODO Y A UN APARATO PARA REDUCIR LA CANTIDAD DE INFORMACION NECESARIA PARA ENCAMINAR UN ENVOLVENTE ESPECTRAL DE ALTA RESOLUCION DE UNA SEÑAL. UN CODIFICADOR DE SUBBANDA PREPARA UNA ESTIMACION DE UN ENVOLVENTE ESPECTRAL DE LA SEÑAL DE ENTRADA A BASE DE DIVIDIR LA SEÑAL DE ENTRADA EN SEÑALES DE SUBBANDA DE FRECUENCIA, GENERA UNA REPRESENTACION ESCALADA DE LAS SEÑALES DE SUBBANDA QUE COMPRENDE LOS FACTORES DE ESCALA Y LOS VALORES ESCALADOS, GENERA UNA REPRESENTACION CODIFICADA DIFERENCIAL DE LOS FACTORES DE ESCALA Y UNE LA REPRESENTACION CODIFICADA DIFERENCIAL Y LOS VALORES ESCALADOS EN UNA SEÑAL CODIFICADA.
ES94927268T 1993-08-31 1994-08-30 Codificador de subbanda con factores de escala codificados de forma diferencial Expired - Lifetime ES2097061T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/115,513 US5581653A (en) 1993-08-31 1993-08-31 Low bit-rate high-resolution spectral envelope coding for audio encoder and decoder

Publications (1)

Publication Number Publication Date
ES2097061T3 true ES2097061T3 (es) 1997-03-16

Family

ID=22361888

Family Applications (1)

Application Number Title Priority Date Filing Date
ES94927268T Expired - Lifetime ES2097061T3 (es) 1993-08-31 1994-08-30 Codificador de subbanda con factores de escala codificados de forma diferencial

Country Status (11)

Country Link
US (1) US5581653A (es)
EP (1) EP0716787B1 (es)
JP (1) JP3940165B2 (es)
AT (1) ATE147910T1 (es)
AU (1) AU685505B2 (es)
CA (1) CA2167527C (es)
DE (1) DE69401517T2 (es)
DK (1) DK0716787T3 (es)
ES (1) ES2097061T3 (es)
SG (1) SG48278A1 (es)
WO (1) WO1995006984A1 (es)

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Also Published As

Publication number Publication date
CA2167527A1 (en) 1995-03-09
DE69401517D1 (de) 1997-02-27
JP3940165B2 (ja) 2007-07-04
EP0716787A1 (en) 1996-06-19
SG48278A1 (en) 1998-04-17
US5581653A (en) 1996-12-03
ATE147910T1 (de) 1997-02-15
AU7676594A (en) 1995-03-22
EP0716787B1 (en) 1997-01-15
CA2167527C (en) 2004-05-18
WO1995006984A1 (en) 1995-03-09
DE69401517T2 (de) 1997-06-12
JPH09502314A (ja) 1997-03-04
DK0716787T3 (da) 1997-06-23
AU685505B2 (en) 1998-01-22

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