GB1506261A - Communications systems - Google Patents

Communications systems

Info

Publication number
GB1506261A
GB1506261A GB26580/75A GB2658075A GB1506261A GB 1506261 A GB1506261 A GB 1506261A GB 26580/75 A GB26580/75 A GB 26580/75A GB 2658075 A GB2658075 A GB 2658075A GB 1506261 A GB1506261 A GB 1506261A
Authority
GB
United Kingdom
Prior art keywords
signals
cpcm
bit
ldm
converted
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
GB26580/75A
Other languages
English (en)
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 GB1506261A publication Critical patent/GB1506261A/en
Expired 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
    • H03M7/3004—Digital delta-sigma modulation
    • H03M7/3013—Non-linear modulators

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Analogue/Digital Conversion (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
GB26580/75A 1974-06-24 1975-06-23 Communications systems Expired GB1506261A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US48238074A 1974-06-24 1974-06-24

Publications (1)

Publication Number Publication Date
GB1506261A true GB1506261A (en) 1978-04-05

Family

ID=23915829

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26580/75A Expired GB1506261A (en) 1974-06-24 1975-06-23 Communications systems

Country Status (7)

Country Link
US (1) US4087754A (enExample)
AU (1) AU8240075A (enExample)
CA (1) CA1068822A (enExample)
FR (1) FR2276741A1 (enExample)
GB (1) GB1506261A (enExample)
IT (1) IT1040695B (enExample)
SE (1) SE405434B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194695A (en) * 1986-08-26 1988-03-09 Sony Corp Apparatus for producing a differential PCM signal

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4199722A (en) * 1976-06-30 1980-04-22 Israel Paz Tri-state delta modulator
GB1588219A (en) * 1977-02-07 1981-04-15 Post Office Conversion of analogue signals to digital signals
NL7801909A (nl) * 1978-02-21 1979-08-23 Philips Nv Inrichting voor het decoderen van een met adap- tieve deltamodulatie gecodeerd signaal.
DE2906886C2 (de) * 1979-02-22 1982-03-25 TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Schaltungsanordnung zur Schrittakt-Gewinnung
DE3265546D1 (en) * 1982-04-03 1985-09-26 Itt Ind Gmbh Deutsche Circuit for a serially operating digital filter
US4484178A (en) * 1982-06-22 1984-11-20 International Business Machines Corporation Digital-to-analog converter
US4520347A (en) * 1982-11-22 1985-05-28 Motorola, Inc. Code conversion circuit
JP2716140B2 (ja) * 1988-04-04 1998-02-18 富士通株式会社 コード変換器及びエンコーダ装置
US4901077A (en) * 1988-04-18 1990-02-13 Thomson Consumer Electronics, Inc. Sigma-delta modulator for D-to-A converter
JPH07114367B2 (ja) * 1988-12-27 1995-12-06 三菱電機株式会社 信号処理装置
JPH0438520A (ja) * 1990-06-04 1992-02-07 Mitsubishi Electric Corp ２進数データ変換装置
US5757320A (en) * 1993-04-12 1998-05-26 The Regents Of The University Of California Short range, ultra-wideband radar with high resolution swept range gate
US5561424A (en) * 1993-04-30 1996-10-01 Lucent Technologies Inc. Data converter with minimum phase fir filter and method for calculating filter coefficients
US5793315A (en) * 1996-05-31 1998-08-11 Motorola, Inc. Bit-serial digital expandor
US5832490A (en) * 1996-05-31 1998-11-03 Siemens Medical Systems, Inc. Lossless data compression technique that also facilitates signal analysis
US7054372B2 (en) * 2000-12-15 2006-05-30 Lucent Technologies Inc. Digital transmission line tap circuit
EP1592136B1 (fr) * 2004-04-21 2012-07-11 St Microelectronics S.A. Démodulateur adaptable
CN103281057A (zh) * 2013-04-28 2013-09-04 康力电梯股份有限公司 一种输入信号的滤波方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3596267A (en) * 1969-01-28 1971-07-27 Bell Telephone Labor Inc Digital code converter for converting a delta modulation code to a different permutation code
US3638219A (en) * 1969-05-23 1972-01-25 Bell Telephone Labor Inc Pcm coder
US3707680A (en) * 1970-05-20 1972-12-26 Communications Satellite Corp Digital differential pulse code modulation system
US3772678A (en) * 1970-06-10 1973-11-13 Univ Sherbrooke Converter from pulse code modulation to delta modulation
JPS513468B1 (enExample) * 1970-10-28 1976-02-03
FR2115686A5 (enExample) * 1970-11-30 1972-07-07 Labo Cent Telecommunicat
US3723909A (en) * 1971-06-21 1973-03-27 J Condon Differential pulse code modulation system employing periodic modulator step modification
US3715722A (en) * 1971-07-02 1973-02-06 Ibm Data normalization system
US3795900A (en) * 1971-11-09 1974-03-05 Nasa Multifunction audio digitizer
US3916107A (en) 1972-10-06 1975-10-28 Bell Telephone Labor Inc Digital system for reclocking pulse code modulation circuits
US3831167A (en) * 1972-11-08 1974-08-20 Bell Telephone Labor Inc Digital-to-analog conversion using multiple decoders
US3878465A (en) * 1972-12-15 1975-04-15 Univ Sherbrooke Instantaneous adaptative delta modulation system
US3824590A (en) * 1973-03-26 1974-07-16 Bell Telephone Labor Inc Adaptive interpolating video encoder
US3906400A (en) * 1973-12-17 1975-09-16 Adams Russell Co Transfer function realization with one-bit coefficients
US4035724A (en) * 1974-05-08 1977-07-12 Universite De Sherbrooke Digital converter from continuous variable slope delta modulation to pulse code modulation
US4044306A (en) * 1974-07-26 1977-08-23 Universite De Snerbrooke Digital converter from pulse code modulation to continuous variable slope delta modulation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194695A (en) * 1986-08-26 1988-03-09 Sony Corp Apparatus for producing a differential PCM signal

Also Published As

Publication number Publication date
FR2276741A1 (fr) 1976-01-23
US4087754A (en) 1978-05-02
CA1068822A (en) 1979-12-25
SE405434B (sv) 1978-12-04
SE7507257L (sv) 1975-12-29
AU8240075A (en) 1977-01-06
FR2276741B3 (enExample) 1979-02-16
IT1040695B (it) 1979-12-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920623