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CA2001862A1 - Appareil de conversion de signaux reduisant les erreurs de quantification pour les applications de telecommunication - Google Patents

Appareil de conversion de signaux reduisant les erreurs de quantification pour les applications de telecommunication

Info

Publication number
CA2001862A1
CA2001862A1 CA2001862A CA2001862A CA2001862A1 CA 2001862 A1 CA2001862 A1 CA 2001862A1 CA 2001862 A CA2001862 A CA 2001862A CA 2001862 A CA2001862 A CA 2001862A CA 2001862 A1 CA2001862 A1 CA 2001862A1
Authority
CA
Canada
Prior art keywords
output signal
conversion apparatus
digital
signal conversion
quantization errors
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
CA2001862A
Other languages
English (en)
Other versions
CA2001862C (fr
Inventor
Harold Gavin Leedy
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.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
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 American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Publication of CA2001862A1 publication Critical patent/CA2001862A1/fr
Application granted granted Critical
Publication of CA2001862C publication Critical patent/CA2001862C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H03M1/12—Analogue/digital converters
    • H03M1/34—Analogue value compared with reference values
    • H03M1/38—Analogue value compared with reference values sequentially only, e.g. successive approximation type
    • H03M1/46—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter
    • H03M1/464—Non-linear conversion
    • 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
    • H03M1/664—Non-linear conversion not otherwise provided for in subgroups of H03M1/66
    • 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
    • H03M7/50—Conversion to or from non-linear codes, e.g. companding
    • 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

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Dc Digital Transmission (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
CA002001862A 1988-12-29 1989-10-31 Appareil de conversion de signaux reduisant les erreurs de quantification pour les applications de telecommunication Expired - Fee Related CA2001862C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US291,728 1988-12-29
US07/291,728 US5008672A (en) 1988-12-29 1988-12-29 Signal conversion apparatus which reduces quantization errors for telecommunications applications

Publications (2)

Publication Number Publication Date
CA2001862A1 true CA2001862A1 (fr) 1990-06-29
CA2001862C CA2001862C (fr) 1993-06-15

Family

ID=23121582

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002001862A Expired - Fee Related CA2001862C (fr) 1988-12-29 1989-10-31 Appareil de conversion de signaux reduisant les erreurs de quantification pour les applications de telecommunication

Country Status (5)

Country Link
US (1) US5008672A (fr)
EP (1) EP0376554B1 (fr)
JP (1) JP2598142B2 (fr)
CA (1) CA2001862C (fr)
DE (1) DE68926613T2 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5210623A (en) * 1989-12-21 1993-05-11 Eastman Kodak Company Apparatus and method for quantizing and/or reconstructing multi-dimensional digital image signals
US5237591A (en) * 1991-08-19 1993-08-17 At&T Bell Laboratories Circuit for digitally adding loss to a signal
US5724393A (en) * 1995-02-17 1998-03-03 Lucent Technologies Inc. Method and apparatus compensating for effects of digital loss insertion in signal transmissions between modems
JP3804902B2 (ja) * 1999-09-27 2006-08-02 パイオニア株式会社 量子化誤差補正方法及び装置並びにオーディオ情報復号方法及び装置
US6895422B2 (en) * 2001-09-13 2005-05-17 Sun Microsystems, Inc. Method and apparatus for computing roots of a polynomial equation with interval coefficients
US6823352B2 (en) * 2001-09-13 2004-11-23 Sun Microsystems, Inc. Solving a nonlinear equation through interval arithmetic and term consistency
US6915321B2 (en) * 2002-01-08 2005-07-05 Sun Microsystems, Inc. Method and apparatus for solving systems of nonlinear equations using interval arithmetic
US6922713B2 (en) * 2002-01-08 2005-07-26 Sun Microsystems, Inc. Method and apparatus for solving an unconstrained global optimization problem
EP3754854B1 (fr) * 2019-01-31 2022-12-21 Shenzhen Goodix Technology Co., Ltd. Circuit d'annulation de courant, dispositif de détection de fréquence cardiaque et appareil portable

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251052A (en) * 1963-05-15 1966-05-10 Towson Lab Inc Reversible analog to digital converter
US3577194A (en) * 1969-01-03 1971-05-04 Gen Electric Analog to digital conversion circuit
FR2155877B1 (fr) * 1971-10-13 1974-05-31 Anvar
US3735392A (en) * 1971-12-08 1973-05-22 Bell Telephone Labor Inc Bipolar analog-to-digital converter with double detection of the sign bit
US3997892A (en) * 1973-07-27 1976-12-14 Trw Inc. Digital to analog converter with improved companding
US3905028A (en) * 1973-08-02 1975-09-09 North Electric Co Direct digital logarithmic encoder
JPS50143458A (fr) * 1974-04-16 1975-11-18
JPS53124642U (fr) * 1977-03-11 1978-10-04
US4142185A (en) * 1977-09-23 1979-02-27 Analogic Corporation Logarithmic analog-to-digital converter
JPS5857132U (ja) * 1981-10-14 1983-04-18 ソニー株式会社 オ−デイオ信号のアナグロ・デジタル変換装置
JPS6292621A (ja) * 1985-10-18 1987-04-28 Matsushita Electric Ind Co Ltd 信号変換装置

Also Published As

Publication number Publication date
EP0376554A3 (fr) 1992-09-02
DE68926613T2 (de) 1996-11-28
US5008672A (en) 1991-04-16
EP0376554B1 (fr) 1996-06-05
JPH02226817A (ja) 1990-09-10
JP2598142B2 (ja) 1997-04-09
EP0376554A2 (fr) 1990-07-04
DE68926613D1 (de) 1996-07-11
CA2001862C (fr) 1993-06-15

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