FR2398417A1 - Convertisseur de code a integration - Google Patents

Convertisseur de code a integration

Info

Publication number
FR2398417A1
FR2398417A1 FR7821254A FR7821254A FR2398417A1 FR 2398417 A1 FR2398417 A1 FR 2398417A1 FR 7821254 A FR7821254 A FR 7821254A FR 7821254 A FR7821254 A FR 7821254A FR 2398417 A1 FR2398417 A1 FR 2398417A1
Authority
FR
France
Prior art keywords
code words
sampling frequency
mfs
converting
code converter
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
FR7821254A
Other languages
English (en)
Other versions
FR2398417B1 (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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2398417A1 publication Critical patent/FR2398417A1/fr
Application granted granted Critical
Publication of FR2398417B1 publication Critical patent/FR2398417B1/fr
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
    • H03M7/3044—Conversion to or from differential modulation with several bits only, i.e. the difference between successive samples being coded by more than one bit, e.g. differential pulse code modulation [DPCM]

Landscapes

  • 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)

Abstract

Dispositif pour la conversion d'un code différentiel en un code absolu avec augmentation simultanée de la fréquence d'échantillonnage. Le dispositif est pourvu d'un filtre numérique d'interpolation non récursif auquel on applique des mots de code d'entrée avec une fréquence d'échantillonnage f, en vue de délivrer des mots de code auxiliaires apparaissant avec une fréquence d'échantillonnage plus grande mfs . Le dispositif comprend aussi un intégrateur numérique servant à convertir les mots de code auxiliaires en des mots de code de sortie également avec une fréquence d'échantillonnage mfs . Application : systèmes de transmission numériques.
FR7821254A 1977-07-22 1978-07-18 Convertisseur de code a integration Expired FR2398417B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7708150A NL7708150A (nl) 1977-07-22 1977-07-22 Integrerende kode-omzetter.

Publications (2)

Publication Number Publication Date
FR2398417A1 true FR2398417A1 (fr) 1979-02-16
FR2398417B1 FR2398417B1 (fr) 1985-06-14

Family

ID=19828920

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7821254A Expired FR2398417B1 (fr) 1977-07-22 1978-07-18 Convertisseur de code a integration

Country Status (6)

Country Link
US (1) US4167731A (fr)
JP (1) JPS6036138B2 (fr)
DE (1) DE2831059C2 (fr)
FR (1) FR2398417B1 (fr)
GB (1) GB2001491B (fr)
NL (1) NL7708150A (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4281318A (en) * 1980-05-30 1981-07-28 Bell Telephone Laboratories, Incorporated Digital-to-digital code converter
JPS5981918A (ja) * 1982-11-02 1984-05-11 Ricoh Elemex Corp Ｄｐｃｍ符号化信号処理回路における復号化回路の信号補間方法
JPS59103423A (ja) * 1982-12-06 1984-06-14 Nippon Telegr & Teleph Corp <Ntt> Ａｄｐｃｍ−ｐｃｍ変換装置
GB2133238A (en) * 1982-12-10 1984-07-18 Marconi Co Ltd Coder/decoder arrangements
US4588979A (en) * 1984-10-05 1986-05-13 Dbx, Inc. Analog-to-digital converter
JPS61195016A (ja) * 1985-02-25 1986-08-29 Nec Corp デイジタルフイルタ
US4782324A (en) * 1987-05-06 1988-11-01 Genrad, Inc. Digital signal synthesizer
US4755794A (en) * 1987-07-23 1988-07-05 American Telephone And Telegraph Company, At&T Bell Laboratories Digital-to-digital code converter
JP2674029B2 (ja) * 1987-08-20 1997-11-05 ソニー株式会社 ディジタル・フィルタ装置
JP2583610B2 (ja) * 1989-07-07 1997-02-19 三菱電機株式会社 Ａ／ｄ、ｄ／ａ変換装置
US5677581A (en) * 1994-06-16 1997-10-14 Nippondenso Co., Ltd. Stepping motor with protruding pole teeth to increase detent torque
JP2001177414A (ja) * 1999-12-17 2001-06-29 Sakai Yasue オーバーサンプリング処理回路およびデジタル−アナログ変換器
JP2001177411A (ja) 1999-12-17 2001-06-29 Sakai Yasue デジタル−アナログ変換器
JP2001177413A (ja) 1999-12-17 2001-06-29 Sakai Yasue オーバーサンプリング処理回路およびデジタル−アナログ変換器
JP4397488B2 (ja) 1999-12-17 2010-01-13 Ｎｓｃ株式会社 オーバーサンプリング処理回路およびデジタル−アナログ変換器
JP4397492B2 (ja) * 1999-12-18 2010-01-13 Ｎｓｃ株式会社 デジタル−アナログ変換器

Family Cites Families (7)

* 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
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
US3906400A (en) * 1973-12-17 1975-09-16 Adams Russell Co Transfer function realization with one-bit coefficients
NL7400764A (nl) * 1974-01-21 1975-07-23 Philips Nv Digitale inrichting voor het omzetten van ge- comprimeerde delta gemoduleerde signalen in pcm-signalen.
US4035724A (en) * 1974-05-08 1977-07-12 Universite De Sherbrooke Digital converter from continuous variable slope delta modulation to pulse code modulation
US3987288A (en) * 1975-04-22 1976-10-19 The United States Of America As Represented By The Secretary Of The Air Force Time multiplexing hybrid sample data filter

Also Published As

Publication number Publication date
GB2001491B (en) 1982-04-21
DE2831059C2 (de) 1982-10-21
JPS5423369A (en) 1979-02-21
JPS6036138B2 (ja) 1985-08-19
US4167731A (en) 1979-09-11
NL7708150A (nl) 1979-01-24
DE2831059A1 (de) 1979-02-01
FR2398417B1 (fr) 1985-06-14
GB2001491A (en) 1979-01-31

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Legal Events

Date Code Title Description
ST Notification of lapse