AR006972A1 - Una disposición de transmisión, el transmisor, el codificador y el método para transmitir la senal. - Google Patents

Una disposición de transmisión, el transmisor, el codificador y el método para transmitir la senal.

Info

Publication number
AR006972A1
AR006972A1 ARP970100567A ARP970100567A AR006972A1 AR 006972 A1 AR006972 A1 AR 006972A1 AR P970100567 A ARP970100567 A AR P970100567A AR P970100567 A ARP970100567 A AR P970100567A AR 006972 A1 AR006972 A1 AR 006972A1
Authority
AR
Argentina
Prior art keywords
signal
synthesis
excitation sequences
target signal
excitation
Prior art date
Application number
ARP970100567A
Other languages
English (en)
Original Assignee
Koninkl Philips Electronics Nv
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 Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Publication of AR006972A1 publication Critical patent/AR006972A1/es

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
    • G10L19/04—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 predictive techniques
    • 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
    • G10L19/04—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 predictive techniques
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
    • 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
    • H04B1/62—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 providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • 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
    • G10L2019/0001—Codebooks
    • G10L2019/0013—Codebook search algorithms

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Computational Linguistics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

En un codificador CELP se ha hecho una comparación entre una senal de objetivo y una pluralidad de senal de síntesis. La senal de síntesis esderivada filtrando una pluralidad de secuencias de excitación por un filtro de síntesis teniendoparám etros derivados de la senal de objetivo. Se seleccionala senal de excitación que resulta en un error mínimo entre la senal de objetivo y la senal de síntesis. La búsqueda de la mejor senal de excitaciónrequiere una complejidad decomputadora considerable. Para reducir la complejidad se hace una preselección de un número pequeno de secuencias deexcitación seleccionando un pequeno número de secuencias de excitación igualando la senal de objetivo filtrada másen reverso. Debido al númeroreducido de secuencias de excitación involucradas en la selección final la complejidad de computadora requerida es reducida.
ARP970100567A 1996-02-15 1997-02-13 Una disposición de transmisión, el transmisor, el codificador y el método para transmitir la senal. AR006972A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96200371 1996-02-15

Publications (1)

Publication Number Publication Date
AR006972A1 true AR006972A1 (es) 1999-10-13

Family

ID=8223673

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP970100567A AR006972A1 (es) 1996-02-15 1997-02-13 Una disposición de transmisión, el transmisor, el codificador y el método para transmitir la senal.

Country Status (9)

Country Link
US (4) US6272196B1 (es)
EP (1) EP0821849B1 (es)
JP (1) JP4097699B2 (es)
KR (1) KR100426514B1 (es)
CN (1) CN1114279C (es)
AR (1) AR006972A1 (es)
DE (1) DE69731588T2 (es)
TW (1) TW317051B (es)
WO (1) WO1997030525A1 (es)

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USD605629S1 (en) 2008-09-29 2009-12-08 Vocollect, Inc. Headset
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Also Published As

Publication number Publication date
TW317051B (es) 1997-10-01
US6272196B1 (en) 2001-08-07
US6608877B1 (en) 2003-08-19
KR100426514B1 (ko) 2004-07-01
JPH11504492A (ja) 1999-04-20
US20010014856A1 (en) 2001-08-16
KR19990007805A (ko) 1999-01-25
US6600798B2 (en) 2003-07-29
EP0821849B1 (en) 2004-11-17
CN1114279C (zh) 2003-07-09
EP0821849A1 (en) 1998-02-04
DE69731588T2 (de) 2005-12-01
DE69731588D1 (de) 2004-12-23
JP4097699B2 (ja) 2008-06-11
US6603832B2 (en) 2003-08-05
WO1997030525A1 (en) 1997-08-21
CN1189263A (zh) 1998-07-29
US20010006537A1 (en) 2001-07-05

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