FR2280261A1 - Dispositif de telecommunication telephonique - Google Patents

Dispositif de telecommunication telephonique

Info

Publication number
FR2280261A1
FR2280261A1 FR7523217A FR7523217A FR2280261A1 FR 2280261 A1 FR2280261 A1 FR 2280261A1 FR 7523217 A FR7523217 A FR 7523217A FR 7523217 A FR7523217 A FR 7523217A FR 2280261 A1 FR2280261 A1 FR 2280261A1
Authority
FR
France
Prior art keywords
telecommunication device
telephone telecommunication
telephone
telecommunication
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.)
Granted
Application number
FR7523217A
Other languages
English (en)
Other versions
FR2280261B3 (fr
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.)
North Electric Co
Original Assignee
North Electric Co
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 North Electric Co filed Critical North Electric Co
Publication of FR2280261A1 publication Critical patent/FR2280261A1/fr
Application granted granted Critical
Publication of FR2280261B3 publication Critical patent/FR2280261B3/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3002—Conversion to or from differential modulation
    • H03M7/3048—Conversion to or from one-bit differential modulation only, e.g. delta modulation [DM]
    • H03M7/3051—Conversion to or from one-bit differential modulation only, e.g. delta modulation [DM] adaptive, e.g. adaptive delta modulation [ADM]
    • 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
    • H04B14/06—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation
    • H04B14/062—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using delta modulation or one-bit differential modulation [1DPCM]
    • H04B14/064—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using delta modulation or one-bit differential modulation [1DPCM] with adaptive feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)
  • Interface Circuits In Exchanges (AREA)
FR7523217A 1974-07-25 1975-07-24 Dispositif de telecommunication telephonique Granted FR2280261A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/491,767 US3937897A (en) 1974-07-25 1974-07-25 Signal coding for telephone communication system

Publications (2)

Publication Number Publication Date
FR2280261A1 true FR2280261A1 (fr) 1976-02-20
FR2280261B3 FR2280261B3 (fr) 1979-04-27

Family

ID=23953583

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7523217A Granted FR2280261A1 (fr) 1974-07-25 1975-07-24 Dispositif de telecommunication telephonique

Country Status (7)

Country Link
US (1) US3937897A (fr)
AU (1) AU8338475A (fr)
CA (1) CA1065069A (fr)
FR (1) FR2280261A1 (fr)
GB (1) GB1506262A (fr)
IT (1) IT1041013B (fr)
SE (1) SE402195B (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4128832A (en) * 1976-01-08 1978-12-05 Ncr Corporation Combined encoder/decoder
FR2345019A1 (fr) * 1976-03-19 1977-10-14 Cit Alcatel Dispositif de transmission de donnees et application a la transmission de signaux analogiques et de donnees dans un reseau avec modulation delta
FR2399763A1 (fr) * 1977-08-03 1979-03-02 Trt Telecom Radio Electr Dispositif numerique pour diviser la frequence d'echantillonnage dans un signal code au moyen de la modulation delta
US4208740A (en) * 1978-12-20 1980-06-17 International Business Machines Corporation Adaptive delta modulation system
US4206447A (en) * 1979-04-09 1980-06-03 Bell Telephone Laboratories, Incorporated Adaptive quantizer apparatus for differential coding of nonuniform digital signals
DE2916576C3 (de) * 1979-04-24 1981-12-10 Siemens AG, 1000 Berlin und 8000 München Digital-Fernmeldesystem für Zweidraht-Getrenntlage-Betrieb
US4271332A (en) * 1979-06-04 1981-06-02 Anderson James C Speech signal A/D converter using an instantaneously-variable bandwidth filter
US4528551A (en) * 1979-11-28 1985-07-09 International Telephone And Telegraph Corporation Digital to analog converter employing sigma-delta modulation for use in telephone systems
US4554633A (en) * 1982-09-30 1985-11-19 General Electric Company Sampled data CT system including analog filter and compensating digital filter
US4518950A (en) * 1982-10-22 1985-05-21 At&T Bell Laboratories Digital code converter
BE897773A (nl) * 1983-09-19 1984-03-19 Bell Telephone Mfg Cy Pulse code modulatie omzetter
CA1271995A (fr) * 1984-07-05 1990-07-24 Nec Corporation Methode et dispositif de surechantillonage pour convertir un signal analogique en signal numerique
GB2172159A (en) * 1985-03-07 1986-09-10 Stc Plc A/d converters
GB2178577B (en) * 1985-07-27 1989-01-11 Plessey Co Plc A signal converter
JPS6354827A (ja) * 1986-08-26 1988-03-09 Sony Corp 差分ｐｃｍ信号形成回路
IT1215464B (it) * 1987-05-07 1990-02-14 Sgs Microelettronica Spa Circuito per la conversione pcm di un segnale analogico, con miglioramento del gain-tracking.
JPH0787376B2 (ja) * 1987-07-24 1995-09-20 シャープ株式会社 デルタ変調符号の復号装置
US5022052A (en) * 1987-11-13 1991-06-04 Seismograph Service Corp. Analog signal binary transmission system using slope detection
JPH08256060A (ja) * 1995-03-17 1996-10-01 Nec Corp 比較型ａ／ｄ変換器
GB9509831D0 (en) * 1995-05-15 1995-07-05 Gerzon Michael A Lossless coding method for waveform data

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL277910A (fr) * 1961-05-02
US3638219A (en) * 1969-05-23 1972-01-25 Bell Telephone Labor Inc Pcm coder
US3633170A (en) * 1970-06-09 1972-01-04 Ibm Digital filter and threshold circuit
US3707712A (en) * 1970-06-10 1972-12-26 Univ Sherbrooke Converter from delta modulation to pulse code modulation
FR2115686A5 (fr) * 1970-11-30 1972-07-07 Labo Cent Telecommunicat
US3652957A (en) * 1970-12-16 1972-03-28 Bell Telephone Labor Inc Adaptive delta modulator
US3831092A (en) * 1971-04-13 1974-08-20 Philips Corp Transmitter for the transmission of signals by pulse code modulation

Also Published As

Publication number Publication date
IT1041013B (it) 1980-01-10
GB1506262A (en) 1978-04-05
SE402195B (sv) 1978-06-19
SE7508438L (sv) 1976-02-26
FR2280261B3 (fr) 1979-04-27
AU8338475A (en) 1977-01-27
US3937897A (en) 1976-02-10
CA1065069A (fr) 1979-10-23

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Legal Events

Date Code Title Description
TP Transmission of property