FR2414267A1 - Decodeur interpole pcm - Google Patents

Decodeur interpole pcm

Info

Publication number
FR2414267A1
FR2414267A1 FR7836636A FR7836636A FR2414267A1 FR 2414267 A1 FR2414267 A1 FR 2414267A1 FR 7836636 A FR7836636 A FR 7836636A FR 7836636 A FR7836636 A FR 7836636A FR 2414267 A1 FR2414267 A1 FR 2414267A1
Authority
FR
France
Prior art keywords
rule
circuit
segment
interpole
pcm
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
FR7836636A
Other languages
English (en)
Other versions
FR2414267B1 (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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of FR2414267A1 publication Critical patent/FR2414267A1/fr
Application granted granted Critical
Publication of FR2414267B1 publication Critical patent/FR2414267B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/004—Reconfigurable analogue/digital or digital/analogue converters
    • H03M1/008—Reconfigurable analogue/digital or digital/analogue converters among different conversion characteristics, e.g. between mu-255 and a-laws
    • 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
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • H04B14/046—Systems or methods for reducing noise or bandwidth
    • H04B14/048—Non linear compression or expansion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • H03M1/74—Simultaneous conversion
    • H03M1/78—Simultaneous conversion using ladder network
    • H03M1/785—Simultaneous conversion using ladder network using resistors, i.e. R-2R ladders

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

DECODEUR INTERPOLE PCM CARACTERISE EN CE QU'IL COMPORTE UN REGISTRE QUI EMMAGASINE UN SIGNAL DE BIT DE POLARITE, DES SIGNAUX A BIT DE SELECTION DE SEGMENT ET DES SIGNAUX A BIT DE QUANTIFICATION UNIFORME PENDANT UNE PERIODE TEST; UN MULTIPLIEUR A VITESSE BINAIRE DANS LEQUEL LES SIGNAUX DE QUANTIFICATION PENETRE A PARTIR DU REGISTRE; UN SYSTEME POUR ADDITIONNER UN SIGNAL DE SORTIE DU MULTIPLIEUR A VITESSE BINAIRE ET LES SIGNAUX A BIT DE SELECTION DE SEGMENT; UN CONVERTISSEUR DIGITALANALOGIQUE QUI COMPREND UN CIRCUIT EN ECHELLE ET UN GROUPE D'INTERRUPTEUR D'ATTAQUE DUDIT CIRCUIT EN ECHELLE ET QUI PRODUIT UNE VALEUR ANALOGIQUE DE L'EXTREMITE INFERIEURE DE CHAQUE SEGMENT; UN CIRCUIT LOGIQUE DE REGLE M DANS LEQUEL PENETRE UNE SORTIE DU SYSTEME D'ADDITION ET QUI PRODUIT UN SIGNAL DE SELECTION POUR LE GROUPE D'INTERRUPTEURS D'ATTAQUE; UN CIRCUIT AND QUI PREND UN PRODUIT LOGIQUE ENTRE LE SIGNAL DE SELECTION DESTINE A CHOISIR L'UNITE MINIMUM DE LA VALEUR ANALOGIQUE DE L'EXTREMITE INFERIEURE DU SEGMENT ET UN SIGNAL DE CONTROLE POUR PERMUTER ENTRE LA REGLE M ET LA REGLE A; ET UN SYSTEME CHOISI PAR LA SORTIE DU CIRCUIT AND ET DESTINE A PRODUIRE LA MEME VALEUR ANALOGIQUE QUE L'UNITE MINIMUM DE LA VALEUR ANALOGIQUE MENTIONNEE CI-DESSUS, DE SORTE QUE LE DECODEUR INTERPOLE PCM PEUT AUSSI ETRE UTILISE EN REGLE A.
FR7836636A 1978-01-06 1978-12-28 Decodeur interpole pcm Granted FR2414267A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21578A JPS5493954A (en) 1978-01-06 1978-01-06 Interpolating pcm decoder

Publications (2)

Publication Number Publication Date
FR2414267A1 true FR2414267A1 (fr) 1979-08-03
FR2414267B1 FR2414267B1 (fr) 1983-01-21

Family

ID=11467725

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7836636A Granted FR2414267A1 (fr) 1978-01-06 1978-12-28 Decodeur interpole pcm

Country Status (6)

Country Link
US (1) US4231022A (fr)
JP (1) JPS5493954A (fr)
CA (1) CA1129104A (fr)
DE (1) DE2900383C2 (fr)
FR (1) FR2414267A1 (fr)
GB (1) GB2012134B (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1130461A (fr) * 1978-08-23 1982-08-24 Hiroshi Kosugi Convertisseur numerique-analogique a interpolation pour signaux mic lineaires
US4311988A (en) * 1979-04-05 1982-01-19 Motorola Inc. Programmable A-law and μ-law DAC
US4404544A (en) * 1981-04-09 1983-09-13 Bell Telephone Laboratories, Incorporated μ-Law/A-law PCM CODEC
USRE34660E (en) * 1983-07-29 1994-07-12 Burr-Brown Corporation Apparatus and methods for digital-to-analog conversion using modified LSB switching
US4750191A (en) * 1984-11-06 1988-06-07 Nec Corporation D/A converter capable of producing an analog signal having levels of a preselected number different from 2N and communication network comprising the D/A converter
JP2844617B2 (ja) * 1988-10-31 1999-01-06 日本電気株式会社 Ｃアレー型ａ／ｄコンバータ
US5101204A (en) * 1990-03-26 1992-03-31 Burr-Brown Corporation Interpolation DAC and method
JPH05327935A (ja) * 1992-05-25 1993-12-10 Canon Inc マルチメディア通信装置
US5883925A (en) * 1995-11-16 1999-03-16 International Business Machines Corporation Pulse code modulation compression mechanism
US6169503B1 (en) 1998-09-23 2001-01-02 Sandisk Corporation Programmable arrays for data conversions between analog and digital

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2155877A1 (fr) * 1971-10-13 1973-05-25 Anvar
US3893102A (en) * 1973-11-02 1975-07-01 Bell Telephone Labor Inc Digital-to-analog converter using differently decoded bit groups
US3987436A (en) * 1975-05-01 1976-10-19 Bell Telephone Laboratories, Incorporated Digital-to-analog decoder utilizing time interpolation and reversible accumulation
FR2352445A1 (fr) * 1976-05-17 1977-12-16 Hasler Ag Convertisseur logique/analogique de segments

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL272024A (fr) * 1960-12-15

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2155877A1 (fr) * 1971-10-13 1973-05-25 Anvar
US3893102A (en) * 1973-11-02 1975-07-01 Bell Telephone Labor Inc Digital-to-analog converter using differently decoded bit groups
US3987436A (en) * 1975-05-01 1976-10-19 Bell Telephone Laboratories, Incorporated Digital-to-analog decoder utilizing time interpolation and reversible accumulation
FR2352445A1 (fr) * 1976-05-17 1977-12-16 Hasler Ag Convertisseur logique/analogique de segments

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/70 *

Also Published As

Publication number Publication date
DE2900383A1 (de) 1979-07-12
CA1129104A (fr) 1982-08-03
US4231022A (en) 1980-10-28
JPS5493954A (en) 1979-07-25
GB2012134A (en) 1979-07-18
GB2012134B (en) 1982-06-30
FR2414267B1 (fr) 1983-01-21
DE2900383C2 (de) 1982-09-23

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Legal Events

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