GB1100726A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB1100726A
GB1100726A GB46535/64A GB4653564A GB1100726A GB 1100726 A GB1100726 A GB 1100726A GB 46535/64 A GB46535/64 A GB 46535/64A GB 4653564 A GB4653564 A GB 4653564A GB 1100726 A GB1100726 A GB 1100726A
Authority
GB
United Kingdom
Prior art keywords
group
pulsers
positive
negative
pcc
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
Application number
GB46535/64A
Other languages
English (en)
Inventor
Frederick Henry Rees
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB46535/64A priority Critical patent/GB1100726A/en
Priority to US495550A priority patent/US3492431A/en
Priority to NO160428A priority patent/NO121282B/no
Priority to SE14606/65A priority patent/SE313594B/xx
Priority to DEJ29379A priority patent/DE1277330B/de
Priority to CH1577965A priority patent/CH458436A/de
Priority to CH843067A priority patent/CH486807A/de
Priority to FR38609A priority patent/FR89055E/fr
Priority to NL6514908A priority patent/NL6514908A/xx
Priority to ES0319662A priority patent/ES319662A1/es
Priority to BE672311D priority patent/BE672311A/xx
Priority to FR48411A priority patent/FR89670E/fr
Publication of GB1100726A publication Critical patent/GB1100726A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/04—Differential modulation with several bits, e.g. differential pulse code modulation [DPCM]
    • H03M3/042—Differential modulation with several bits, e.g. differential pulse code modulation [DPCM] with adaptable step size, e.g. adaptive differential pulse code modulation [ADPCM]

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Dc Digital Transmission (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Analogue/Digital Conversion (AREA)
GB46535/64A 1963-01-25 1964-11-16 Improvements in or relating to telephone systems Expired GB1100726A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
GB46535/64A GB1100726A (en) 1964-11-16 1964-11-16 Improvements in or relating to telephone systems
US495550A US3492431A (en) 1964-11-16 1965-10-13 Delta modulation system using a constant code length less than the available code length with automatic range shift within the available code length
NO160428A NO121282B (https=) 1964-11-16 1965-11-11
SE14606/65A SE313594B (https=) 1964-11-16 1965-11-12
DEJ29379A DE1277330B (de) 1964-11-16 1965-11-13 Pulscodemodulations-UEbertragungssystem fuer positive und negative Werte
CH1577965A CH458436A (de) 1964-11-16 1965-11-16 Verfahren zur Umsetzung mindestens eines analogen Signales in binäre Impulscode-Kombinationen
CH843067A CH486807A (de) 1964-11-16 1965-11-16 Verfahren zur Umsetzung von binären Impulscode-Kombinationen in analoge Signale
FR38609A FR89055E (fr) 1963-01-25 1965-11-16 Transmission des valeurs numériques en code digital
NL6514908A NL6514908A (https=) 1964-11-16 1965-11-16
ES0319662A ES319662A1 (es) 1964-11-16 1965-11-16 Un sistema de modulaciën en cëdigo de impulsos electricos
BE672311D BE672311A (https=) 1964-03-06 1965-11-16
FR48411A FR89670E (fr) 1963-01-25 1966-02-04 Transmission des valeurs numériques en code digital

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB46535/64A GB1100726A (en) 1964-11-16 1964-11-16 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
GB1100726A true GB1100726A (en) 1968-01-24

Family

ID=10441632

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46535/64A Expired GB1100726A (en) 1963-01-25 1964-11-16 Improvements in or relating to telephone systems

Country Status (8)

Country Link
US (1) US3492431A (https=)
CH (2) CH486807A (https=)
DE (1) DE1277330B (https=)
ES (1) ES319662A1 (https=)
GB (1) GB1100726A (https=)
NL (1) NL6514908A (https=)
NO (1) NO121282B (https=)
SE (1) SE313594B (https=)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2077475B1 (https=) * 1969-12-31 1976-07-23 Radiotechnique Compelec
US3784737A (en) * 1973-01-12 1974-01-08 United Aircraft Corp Hybrid data compression
FR2273297B1 (https=) 1974-02-04 1977-04-15 Canon Kk

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE485549A (https=) * 1947-11-08
AT176874B (de) * 1948-10-04 1953-12-10 Philips Nv Übertragungsanlage mit einem Sender und einem Empfänger für Impulskodemodulation
US2759998A (en) * 1951-10-26 1956-08-21 Itt Pulse communication system
DE1076181B (de) * 1958-09-18 1960-02-25 Standard Elektrik Lorenz Ag Anordnung zur Decodierung von PCM-Signalen
NL293852A (https=) * 1962-06-08
GB1007669A (en) * 1963-01-15 1965-10-22 Gen Electric Co Ltd Improvements in or relating to decoders for pulse code modulation systems
GB1039341A (en) * 1963-01-25 1966-08-17 Standard Telephones Cables Ltd Improvements in or relating to coding equipment
US3241135A (en) * 1963-03-04 1966-03-15 Philco Corp Aperiodic pulse code modulator or analog to digital converter
US3335409A (en) * 1964-06-25 1967-08-08 Westinghouse Electric Corp Permutation apparatus
US3403226A (en) * 1965-09-30 1968-09-24 Bell Telephone Labor Inc Reduced bandwidth dual mode encoding of video signals
US3393364A (en) * 1965-10-23 1968-07-16 Signatron Statistical delta modulation system

Also Published As

Publication number Publication date
NO121282B (https=) 1971-02-08
US3492431A (en) 1970-01-27
ES319662A1 (es) 1966-05-01
DE1277330B (de) 1968-09-12
CH486807A (de) 1970-02-28
SE313594B (https=) 1969-08-18
NL6514908A (https=) 1966-05-17
CH458436A (de) 1968-06-30

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