CA2217693C - Transcodeur empechant le codage en cascade de signaux vocaux - Google Patents

Transcodeur empechant le codage en cascade de signaux vocaux Download PDF

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Publication number
CA2217693C
CA2217693C CA002217693A CA2217693A CA2217693C CA 2217693 C CA2217693 C CA 2217693C CA 002217693 A CA002217693 A CA 002217693A CA 2217693 A CA2217693 A CA 2217693A CA 2217693 C CA2217693 C CA 2217693C
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CA
Canada
Prior art keywords
speech
transcoder
frame
frames
pcm
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
CA002217693A
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English (en)
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CA2217693A1 (fr
Inventor
Matti Lehtimaki
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.)
Conversant Wireless Licensing SARL
Original Assignee
Nokia Telecommunications Oy
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 FI951807A external-priority patent/FI101439B/fi
Application filed by Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Publication of CA2217693A1 publication Critical patent/CA2217693A1/fr
Application granted granted Critical
Publication of CA2217693C publication Critical patent/CA2217693C/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • 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
    • G10L19/04—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
    • G10L19/16—Vocoder architecture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H04W88/181—Transcoding devices; Rate adaptation devices

Abstract

L'invention concerne un transcodeur (TRCU1, TRCU2) pourvu de moyens empêchant le codage en cascade des signaux vocaux dans une communication de radiotéléphone à radiotéléphone (MS1, MS2) à l'intérieur d'un système de télécommunication mobile employant un procédé de codage des signaux vocaux pour réduire la rapidité de transmission sur le trajet radioélectrique. Le transcodeur (TRCU1, TRCU2) comprend un codeur de signaux vocaux (52, 73) qui code le signal vocal en paramètres de signaux vocaux afin de le transmettre à une station mobile, et qui décode ces mêmes paramètres reçus de ladite station mobile en un signal vocal selon ledit procédé de codage des signaux vocaux, ainsi qu'un codeur MIC (54, 72) destiné à émettre un signal vocal de liaison montante à destination d'une interface MIC et à recevoir un signal vocal de liaison descendante en provenance de cette même interface sous forme d'échantillons vocaux MIC. Outre son fonctionnement normal, le transcodeur émet et reçoit des paramètres de signaux vocaux par l'intermédiaire d'une interface MIC dans un sous-canal formé par des bits de poids faible des échantillons vocaux MIC. Il est ainsi possible d'empêcher le codage en cascade tout en maintenant l'interface MIC normalisée et les signalisations et services qui y sont associés.
CA002217693A 1995-04-13 1996-04-11 Transcodeur empechant le codage en cascade de signaux vocaux Expired - Lifetime CA2217693C (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI951807 1995-04-13
FI951807A FI101439B (fi) 1995-04-13 1995-04-13 Transkooderi, jossa on tandem-koodauksen esto
PCT/FI1996/000192 WO1996032823A1 (fr) 1995-04-13 1996-04-11 Transcodeur empechant le codage en cascade de signaux vocaux

Publications (2)

Publication Number Publication Date
CA2217693A1 CA2217693A1 (fr) 1996-10-17
CA2217693C true CA2217693C (fr) 2006-10-10

Family

ID=37111767

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002217693A Expired - Lifetime CA2217693C (fr) 1995-04-13 1996-04-11 Transcodeur empechant le codage en cascade de signaux vocaux

Country Status (1)

Country Link
CA (1) CA2217693C (fr)

Also Published As

Publication number Publication date
CA2217693A1 (fr) 1996-10-17

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Effective date: 20160411