ES2109346T3 - Deteccion de rafagas de error. - Google Patents

Deteccion de rafagas de error.

Info

Publication number
ES2109346T3
ES2109346T3 ES92906492T ES92906492T ES2109346T3 ES 2109346 T3 ES2109346 T3 ES 2109346T3 ES 92906492 T ES92906492 T ES 92906492T ES 92906492 T ES92906492 T ES 92906492T ES 2109346 T3 ES2109346 T3 ES 2109346T3
Authority
ES
Spain
Prior art keywords
voice
viterbi
decoder
stored
demodulated
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
ES92906492T
Other languages
English (en)
Inventor
Michael John Severn View Carey
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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 British Telecommunications PLC filed Critical British Telecommunications PLC
Application granted granted Critical
Publication of ES2109346T3 publication Critical patent/ES2109346T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
    • H03M13/41—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Artificial Intelligence (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Error Detection And Correction (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Radio Transmission System (AREA)
  • Noise Elimination (AREA)

Abstract

UNA SEÑAL MODULADA QUE SOPORTA UNA VOZ U OTRA INFORMACION DIGITALMENTE CODIFICADA SE DEMODULA (1): SE PRODUCE UNA SEÑAL SIMILAR 1 (T) (POR EJEMPLO EN UN DESCODIFICADOR "VITERBI" (4)) PARA CADA SIMBOLO DEMODULADO, INDICANDO SU VERACIDAD. ESTO SE USA PARA ACTUALIZAR LAS PROBABILIDADES PG(T), PB(T) DE CANAL DE TRANSMISION QUE ESTAN EN UN ESTADO RELATIVAMENTE LIBRE DE ERRORES, USANDO UN ALGORITMO DE "VITERBI" EN DEPENDENCIA DE LOS PARAMETROS ALMACENADOS QUE REPRESENTAN LAS ESTIMACIONES DE LAS TRANSICIONES DE PROBABILIDAD ENTRE LOS ESTADOS. SE GENERA UNA SEÑAL DE DECISION E(T) QUE DEPENDE DE LAS MAGNITUDES RELATIVAS DE LAS PROBABILIDADES PG(T), PB(T). EL RESULTADO PUEDE UTILIZARSE PARA INHIBIR EL USO DE LOS BITS AFECTADOS, SUMINISTRANDO UN DECODIFICADOR DE VOZ (9) CON PARAMETROS (ALMACENADOS EN 82A, ETC) A PARTIR DE UN MARCO DE VOZ ANTERIOR.
ES92906492T 1991-03-11 1992-03-11 Deteccion de rafagas de error. Expired - Lifetime ES2109346T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB919105101A GB9105101D0 (en) 1991-03-11 1991-03-11 Error burst detection

Publications (1)

Publication Number Publication Date
ES2109346T3 true ES2109346T3 (es) 1998-01-16

Family

ID=10691345

Family Applications (1)

Application Number Title Priority Date Filing Date
ES92906492T Expired - Lifetime ES2109346T3 (es) 1991-03-11 1992-03-11 Deteccion de rafagas de error.

Country Status (10)

Country Link
US (1) US5416788A (es)
EP (1) EP0575422B1 (es)
JP (1) JP3165150B2 (es)
AT (1) ATE158681T1 (es)
DE (1) DE69222413T2 (es)
DK (1) DK0575422T3 (es)
ES (1) ES2109346T3 (es)
GB (1) GB9105101D0 (es)
SG (1) SG52316A1 (es)
WO (1) WO1992016065A1 (es)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2876497B2 (ja) * 1991-08-23 1999-03-31 松下電器産業株式会社 誤り訂正符復号化方法およびその装置
NZ251956A (en) * 1992-04-27 1995-08-28 Commw Of Australia Optimum estimation of parameters defining a communications link
FI96248C (fi) * 1993-05-06 1996-05-27 Nokia Mobile Phones Ltd Menetelmä pitkän aikavälin synteesisuodattimen toteuttamiseksi sekä synteesisuodatin puhekoodereihin
JPH06334697A (ja) * 1993-05-20 1994-12-02 Matsushita Electric Ind Co Ltd 誤り検出方法
FI98164C (fi) * 1994-01-24 1997-04-25 Nokia Mobile Phones Ltd Puhekooderin parametrien käsittely tietoliikennejärjestelmän vastaanottimessa
FI944739A7 (fi) 1994-10-07 1996-04-08 Nokia Corp Häiriönpoistomenetelmä ja vastaanotin
US5710781A (en) * 1995-06-02 1998-01-20 Ericsson Inc. Enhanced fading and random pattern error protection for dynamic bit allocation sub-band coding
JP2838994B2 (ja) * 1995-12-27 1998-12-16 日本電気株式会社 データ信号受信装置
DE19825398A1 (de) * 1998-05-27 1999-12-02 Deutsche Telekom Ag Verfahren und Vorrichtung zur Übertragung digitalisierter Daten
WO2001093488A1 (en) * 2000-05-29 2001-12-06 Telefonaktiebolaget Lm Ericsson (Publ) Error detection and error concealment for encoded speech data

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6333028A (ja) * 1986-07-26 1988-02-12 Nec Corp 信号検出方式
US4802171A (en) * 1987-06-04 1989-01-31 Motorola, Inc. Method for error correction in digitally encoded speech
GB2215567B (en) * 1988-03-05 1992-11-18 Plessey Co Plc Improvements in or relating to equalisers
JP2960436B2 (ja) * 1989-06-26 1999-10-06 株式会社日立製作所 非線形データ伝送システム用受信器
EP0494709B1 (en) * 1991-01-09 1998-05-27 Philips Electronics Uk Limited Signal transmission system with sepatate tree coding for each of the parameters

Also Published As

Publication number Publication date
US5416788A (en) 1995-05-16
DE69222413T2 (de) 1998-03-19
DK0575422T3 (da) 1998-04-27
ATE158681T1 (de) 1997-10-15
GB9105101D0 (en) 1991-04-24
SG52316A1 (en) 1998-09-28
DE69222413D1 (de) 1997-10-30
WO1992016065A1 (en) 1992-09-17
EP0575422A1 (en) 1993-12-29
EP0575422B1 (en) 1997-09-24
JP3165150B2 (ja) 2001-05-14
JPH06505374A (ja) 1994-06-16

Similar Documents

Publication Publication Date Title
ES2109346T3 (es) Deteccion de rafagas de error.
GB9410337D0 (en) Key transmission system
ES2164900T3 (es) Aparatos y metodos para descodificar señales de video codificadas en diferentes formatos.
ES2095261T3 (es) Decodificacion por decision flexible con ecualizacion de canal.
BR9811918A (pt) Processo e dispositivo para avaliação da qualidade de serviço em canais de transmissão em um sistema de transmissão digital
BR9815807A (pt) Método e aparelho para gerar um sinal que tem uma estrutura de quadros, e método e aparelho para sincronização de quadros
NO940081L (no) Signalprosessering med koding/dekoding ved hjelp av videreutviklede Viterbialogritmer av kategori LVA,GVA og SOVA
BR9909975A (pt) Processo de transmitir informação, sistema de transmissão de diversidade para transmitir informação, processo de receber informação, e, terminal de usuário para receber informação
ES2117560B1 (es) Decodificador y metodo para el mismo.
ES2105691T3 (es) Aparato grabador de datos.
EP1241795A3 (en) Method and system for transmitting and receiving information using chain reaction codes
ES2156456T3 (es) Control de copia de video con varias señales incrustadas.
AU6520596A (en) Apparatus and method for synchronizing base sites individually in a communication system
BR0003068A (pt) Método de demodulação para receptor
ES2097035T3 (es) Procedimiento para la gestion de errores de transmision entre una estacion de base y un transcodificador en un sistema de radiocomunicacion numerica, estacion de base y transcodificador correspondientes.
ES2132337T3 (es) Ganancia estadistica usando señalizacion en modo de transferencia asincrona (atm).
BR9814510A (pt) Sistema, dispositivo e método para transmissão de pcm ascendente utilizando uma constelação de tranmissão otimizada
DE69520536D1 (de) Taktrückgewinnung für einen ATM-Empfänger
EP0627723A3 (en) Instrument with keys provided with stops for a performance with mute keys.
GB2354203A (en) Wind propelled watercraft
NO923945D0 (no) System for aa hindre en omkaster fra aa generere uoenskede symboler
DK0612456T3 (da) Transmissionssystem for kodede talesignaler og/eller talebånddata
EP1162772A3 (en) Method for ensuring error-free transmission of a telecommunication signal including temporary data channels
EP0884865A3 (en) Method of coding signal for digital optical communication
DE3878724D1 (de) Ueberwachungssystem fuer ein lokales bus-netz in sternstruktur.

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 575422

Country of ref document: ES