DE69229679D1 - Übertragungssystem für kodierte sprachsignale und/oder sprachbanddaten - Google Patents

Übertragungssystem für kodierte sprachsignale und/oder sprachbanddaten

Info

Publication number
DE69229679D1
DE69229679D1 DE69229679T DE69229679T DE69229679D1 DE 69229679 D1 DE69229679 D1 DE 69229679D1 DE 69229679 T DE69229679 T DE 69229679T DE 69229679 T DE69229679 T DE 69229679T DE 69229679 D1 DE69229679 D1 DE 69229679D1
Authority
DE
Germany
Prior art keywords
speech
parity
pct
data
signals
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
DE69229679T
Other languages
English (en)
Other versions
DE69229679T2 (de
Inventor
Andrew Davis
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
Publication of DE69229679D1 publication Critical patent/DE69229679D1/de
Application granted granted Critical
Publication of DE69229679T2 publication Critical patent/DE69229679T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4906—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using binary codes
    • H04L25/4908—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using binary codes using mBnB codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1682—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/068—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using time division multiplex techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Error Detection And Correction (AREA)
DE69229679T 1991-11-15 1992-11-13 Übertragungssystem für kodierte sprachsignale und/oder sprachbanddaten Expired - Lifetime DE69229679T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB919124331A GB9124331D0 (en) 1991-11-15 1991-11-15 Voice-band digital signals
PCT/GB1992/002102 WO1993010623A1 (en) 1991-11-15 1992-11-13 Transmission system for coded speech signals and/or voiceband data

Publications (2)

Publication Number Publication Date
DE69229679D1 true DE69229679D1 (de) 1999-09-02
DE69229679T2 DE69229679T2 (de) 2000-02-10

Family

ID=10704709

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69229679T Expired - Lifetime DE69229679T2 (de) 1991-11-15 1992-11-13 Übertragungssystem für kodierte sprachsignale und/oder sprachbanddaten

Country Status (10)

Country Link
US (1) US5615297A (de)
EP (1) EP0612456B1 (de)
JP (1) JP3236617B2 (de)
AT (1) ATE182730T1 (de)
CA (1) CA2121896C (de)
DE (1) DE69229679T2 (de)
DK (1) DK0612456T3 (de)
GB (1) GB9124331D0 (de)
NO (1) NO309250B1 (de)
WO (1) WO1993010623A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9221183D0 (en) * 1992-10-08 1992-11-25 Hocking Richard J Telecommunication system
FI100932B (fi) * 1995-04-12 1998-03-13 Nokia Telecommunications Oy Äänitaajuussignaalien lähetys radiopuhelinjärjestelmässä
JP3140960B2 (ja) * 1996-04-05 2001-03-05 富士通株式会社 モデム信号送信装置及びモデム信号送信方法並びにモデム信号受信装置及びモデム信号受信方法並びにモデム信号送受信システム及びモデム信号送受信方法
FI113600B (fi) * 1996-09-17 2004-05-14 Nokia Corp Signalointi digitaalisessa matkaviestinjärjestelmässä
JP3252782B2 (ja) 1998-01-13 2002-02-04 日本電気株式会社 モデム信号対応音声符号化復号化装置
US6446042B1 (en) * 1999-11-15 2002-09-03 Sharp Laboratories Of America, Inc. Method and apparatus for encoding speech in a communications network
US6718297B1 (en) 2000-02-15 2004-04-06 The Boeing Company Apparatus and method for discriminating between voice and data by using a frequency estimate representing both a central frequency and an energy of an input signal
JP2005252639A (ja) * 2004-03-04 2005-09-15 Nec Access Technica Ltd Ｐｃｍ符号を用いたデータ伝送システムおよび音声／データ通信切替方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4876696A (en) * 1986-07-18 1989-10-24 Nec Corporation Transmission system for transmitting multifrequency signals or modem signals with speech signals
JPH0272733A (ja) * 1988-09-07 1990-03-13 Fujitsu Ltd パリティ機能チエツク方式
JPH03125525A (ja) * 1989-10-09 1991-05-28 Fujitsu Ltd 多重化信号識別方式
CA2026308C (en) * 1989-10-30 1996-04-23 David O. Anderton Facsimile compression for transmission

Also Published As

Publication number Publication date
WO1993010623A1 (en) 1993-05-27
JPH07501191A (ja) 1995-02-02
ATE182730T1 (de) 1999-08-15
JP3236617B2 (ja) 2001-12-10
EP0612456B1 (de) 1999-07-28
NO941806D0 (no) 1994-05-13
GB9124331D0 (en) 1992-01-08
EP0612456A1 (de) 1994-08-31
NO309250B1 (no) 2001-01-02
DK0612456T3 (da) 2000-02-07
US5615297A (en) 1997-03-25
CA2121896A1 (en) 1993-05-27
DE69229679T2 (de) 2000-02-10
NO941806L (no) 1994-05-13
CA2121896C (en) 1998-06-30

Similar Documents

Publication Publication Date Title
SE9303942L (sv) Feldetekteringssystem
SE9500858L (sv) Anordning och förfarande vid talöverföring och ett telekommunikationssystem omfattande dylik anordning
JPS6473945A (en) Digital recorder
DE69229679T2 (de) Übertragungssystem für kodierte sprachsignale und/oder sprachbanddaten
AU6482286A (en) Method and apparatus for correcting errors in digital audio signals
GB2263849B (en) Error detection
ATE183345T1 (de) Digitales übertragungssystem
EP0478125A3 (en) Discriminating information from noise in a communication signal
DK0635177T3 (da) Fremgangsmåde til overførsel og/eller lagring af digitaliserede, datareducerede audiosignaler
DE69226457D1 (de) Übertragungssystem und Empfänger zur Verwendung im Übertragungssystem
KR950013084A (ko) 전송기, 수신기, 부호기, 및 디코더를 구비하여 구성된 전송장치
EP0171234A2 (de) Schaltungsanordnung zur Authentifikation von gesprochenen Worten für verfälschungsgeschützte Aufzeichnung
KR960003182A (ko) Hdlc nrzi 통신 시스템에서의 선로이중화장치
JPS57208613A (en) Magnetic recorder and reproducer
JPS57185752A (en) Reproduction relay system
JPS57180246A (en) Digital data signal multiplexing system
KR930010943A (ko) 디지탈 신호의 에러 저감 회로
KR930022765A (ko) 에러 정정 시스템
GB9820757D0 (en) Audio compression
ES2009048A6 (es) Metodo y sistema para la comprobacion de errores de senales transmitidas a traves de linea de transmision.
KR860002914A (ko) 원격제어기의 수신 확신도 향상법
JPH0298244A (ja) パリテイチエツク方式
JPS57141176A (en) Detection system for synchronizing signal in facsimile signal
JPS6443875A (en) Transmission method
JPS57211854A (en) Data recording system

Legal Events

Date Code Title Description
8364 No opposition during term of opposition