ES2073432T3 - Codecs con supresion de multiples codificaciones/decodificaciones a traves de una conexion. - Google Patents

Codecs con supresion de multiples codificaciones/decodificaciones a traves de una conexion.

Info

Publication number
ES2073432T3
ES2073432T3 ES89302099T ES89302099T ES2073432T3 ES 2073432 T3 ES2073432 T3 ES 2073432T3 ES 89302099 T ES89302099 T ES 89302099T ES 89302099 T ES89302099 T ES 89302099T ES 2073432 T3 ES2073432 T3 ES 2073432T3
Authority
ES
Spain
Prior art keywords
encoder
decoder
kilobits
conversation
decoders
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
ES89302099T
Other languages
English (en)
Inventor
Steven Leslie Gay
Richard Dennis Gitlin
John Hartung
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.)
AT&T Corp
Original Assignee
AT&T 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 AT&T Corp filed Critical AT&T Corp
Application granted granted Critical
Publication of ES2073432T3 publication Critical patent/ES2073432T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • H04B14/046—Systems or methods for reducing noise or bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

EN UNA RED PRIVADA DE TELECOMUNICACIONES, UNA PLURALIDAD DE CENTRALITAS PRIVADAS DIGITALES ESTAN INTERCONECTADAS MEDIANTE PARES DE CODIFICADORES/DECODIFICADORES. LOS CODIFICADORES/DECODIFICADORES DE CADA PAR, O TANDEM, SON CADA UNO DE ELLOS OPERATIVOS PARA CODIFICAR 64 KILOBITS/SEGUNDO (KBPS) DE CONVERSACION MU DE 64 KILOBITS/SEGUNDO PARA SU TRANSMISION AL OTRO CODIFICADOR/DECODIFICADOR EN EL TANDEM. EL ULTIMO ES OPERATIVO PARA DESCOMPRIMIR DESPUES LOS 16 KILOBITS/SEGUNDO DE CONVERSACION Y DEVOLVERLA A 64 KILOBITS/SEGUNDO. CADA CODIFICADOR/DECODIFICADOR TIENE UN SEGUNDO MODO DE OPERACION EN EL CUAL MAS QUE DECODIFICAR LA CONVERSACION CODIFICADA, PRESERVA LOS BITS EN SU PROPIA L DE SALIDA. EL CODIFICADOR/DECODIFICADOR REALIZA UNA TRANSICION A ESTE MODO CUANDO RECONOCE LA PRESENCIA DE OTRO CODIFICADOR/DECODIFICADOR EN SU EXTREMO DE ALTA VELOCIDAD DE TRANSPARENCIA DE BITS. COMO RESULTADO, SOLO SE REALIZA UN CICLO DE CODIFICACION/DECODIFICACION A TRAVES DE LA CONEXION, MINIMIZANDO ASI LA DISTORSION DE CODIFICACION DE CONVERSACION INDUCIDA Y EL RETARDO. EL MECANISMO PERMITE QUE UN CODIFICADOR/DECODIFICADOR COMUNIQUE SU PRESENCIA A OTRO CODIFICADOR/DECODIFICADOR EN SU EXTREMO DE ALTA VELOCIDAD DE TRANSPARENCIA DE BITS DE LA CONEXION BASANDOSE EN LA TRANSMISION DE UNOS PATRONES DE SINCRONIZACION PREDETERMINADOS INSERTADOS EN LAS LES QUE EMITE EN ESTA DIRECCION. EN UN SEGUNDO DISEÑO, LOS CODIFICADORES/DECODIFICADORES ANTES DESCRITOS SON UTILIZADOS EN UN SISTEMA CELULAR DE TELECOMUNICACIONES DE RADIO MOVIL.
ES89302099T 1988-03-11 1989-03-02 Codecs con supresion de multiples codificaciones/decodificaciones a traves de una conexion. Expired - Lifetime ES2073432T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/166,867 US4924480A (en) 1988-03-11 1988-03-11 Codecs with suppression of multiple encoding/decodings across a connection

Publications (1)

Publication Number Publication Date
ES2073432T3 true ES2073432T3 (es) 1995-08-16

Family

ID=22605001

Family Applications (1)

Application Number Title Priority Date Filing Date
ES89302099T Expired - Lifetime ES2073432T3 (es) 1988-03-11 1989-03-02 Codecs con supresion de multiples codificaciones/decodificaciones a traves de una conexion.

Country Status (8)

Country Link
US (1) US4924480A (es)
EP (1) EP0332345B1 (es)
JP (1) JPH0738617B2 (es)
KR (1) KR970008904B1 (es)
CA (1) CA1339517C (es)
DE (1) DE68923109T2 (es)
ES (1) ES2073432T3 (es)
HK (1) HK103996A (es)

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US5551073A (en) * 1993-02-25 1996-08-27 Ericsson Inc. Authentication key entry in cellular radio system
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US7266186B1 (en) 1994-01-05 2007-09-04 Intellect Wireless Inc. Method and apparatus for improved paging receiver and system
DE4405659C1 (de) * 1994-02-22 1995-04-06 Fraunhofer Ges Forschung Verfahren zum kaskadierten Codieren und Decodieren von Audiodaten
CA2158298A1 (en) * 1994-09-22 1996-03-23 Haim Guata Digital speech communication system
FI100079B (fi) * 1994-11-09 1997-09-15 Nokia Telecommunications Oy Menetelmä koodauksen toteuttamiseksi solukkoradioverkossa
GB9507058D0 (en) * 1995-04-05 1995-05-31 Newbridge Networks Corp Super tandem high capacity voice transmission system
FI101439B (fi) * 1995-04-13 1998-06-15 Nokia Telecommunications Oy Transkooderi, jossa on tandem-koodauksen esto
US5734979A (en) 1995-05-04 1998-03-31 Interwave Communications International, Ltd. Cellular base station with intelligent call routing
DE19516078B4 (de) * 1995-05-05 2006-06-08 Robert Bosch Gmbh Verfahren zur Übertragung von Daten, insbesondere GSM-Daten
US5758256A (en) * 1995-06-07 1998-05-26 Hughes Electronics Corporation Method of transporting speech information in a wireless cellular system
ZA964331B (en) * 1995-06-08 1996-12-17 Qualcomm Inc Remote vocoding over long distance link
US5867784A (en) * 1995-07-05 1999-02-02 Telefonaktiebolaget Lm Ericsson Call forwarding in a mobile communication system
DE19544367A1 (de) 1995-11-29 1997-06-05 Bosch Gmbh Robert Verfahren zum Übertragen von Daten, insbesondere von GSM-Daten
FI102445B1 (fi) * 1996-02-08 1998-11-30 Nokia Telecommunications Oy Transmissiolaitteisto keskusten väliselle yhteydelle
US6178182B1 (en) * 1996-08-29 2001-01-23 Siemens Aktiengesellschaft Method and communication system for the transmission of compressed voice information in a communication network
DK0847210T3 (da) * 1996-12-04 2006-05-22 Bosch Gmbh Robert Fremgangsmåde ved dataoverföring, især af GSM-data
FI106082B (fi) 1996-12-05 2000-11-15 Nokia Networks Oy Menetelmä puhekanavan takaisinkytkemisen havaitsemiseksi sekä puheenkäsittelylaite
GB2320166A (en) * 1996-12-09 1998-06-10 Motorola Ltd method of reverting to tandem operation between transcoders of a communication system
US6069888A (en) * 1997-02-26 2000-05-30 Qualcomm Inc. Integrated voice mail system for CDMA network
US6021136A (en) * 1997-07-30 2000-02-01 At&T Corp. Telecommunication network that reduces tandeming of compressed voice packets
AU9404098A (en) * 1997-09-23 1999-04-12 Voxware, Inc. Scalable and embedded codec for speech and audio signals
US6108560A (en) * 1997-09-26 2000-08-22 Nortel Networks Corporation Wireless communications system
JPH11136710A (ja) * 1997-10-28 1999-05-21 Fujitsu Ltd セル伝送ネットワークにおける通信データのディジタル１リンク中継システム
US6327053B1 (en) 1997-12-12 2001-12-04 Nortel Networks Limited Facsimile signal transmission with suppression of multiple modulation and demodulation across a connection
DE19756191A1 (de) * 1997-12-17 1999-06-24 Ericsson Telefon Ab L M Verfahren, Vermittlungseinrichtung und Telekommunikationssystem zum Ausführen von Datenkommunikationen zwischen Teilnehmerstationen
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RU2144264C1 (ru) 1998-11-05 2000-01-10 ЯН Давид Евгеньевич Способ беспроводной передачи и приема кодовой информации на расстоянии (варианты) и портативное устройство для беспроводной передачи кодовой информации на расстоянии
CN1137570C (zh) * 1999-02-04 2004-02-04 诺基亚网络有限公司 音调检测消除
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US3761610A (en) * 1971-02-16 1973-09-25 Graphics Sciences Inc High speed fascimile systems
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NL8401443A (nl) * 1984-05-07 1985-12-02 Philips Nv Telecommunicatiesysteem in het bijzonder een telefoonsysteem.
US4663766A (en) * 1984-10-10 1987-05-05 Paradyne Corporation Method of determining automatically the rate of data signals in a modem
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JPH07120989B2 (ja) * 1986-02-12 1995-12-20 株式会社日立製作所 圧縮多重化装置

Also Published As

Publication number Publication date
EP0332345B1 (en) 1995-06-21
CA1339517C (en) 1997-10-28
EP0332345A2 (en) 1989-09-13
KR890015555A (ko) 1989-10-30
DE68923109T2 (de) 1996-05-15
DE68923109D1 (de) 1995-07-27
JPH0738617B2 (ja) 1995-04-26
JPH01272330A (ja) 1989-10-31
HK103996A (en) 1996-06-21
EP0332345A3 (en) 1991-09-11
US4924480A (en) 1990-05-08
KR970008904B1 (en) 1997-05-30

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