CA991311A - Digital transmission system with frequency weighted noise reduction - Google Patents

Digital transmission system with frequency weighted noise reduction

Info

Publication number
CA991311A
CA991311A CA146,838A CA146838A CA991311A CA 991311 A CA991311 A CA 991311A CA 146838 A CA146838 A CA 146838A CA 991311 A CA991311 A CA 991311A
Authority
CA
Canada
Prior art keywords
transmission system
noise reduction
digital transmission
frequency weighted
weighted noise
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
CA146,838A
Other languages
English (en)
Other versions
CA146838S (en
Inventor
Arnold S. Rosenbaum
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
Western Electric 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 Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to CA239,798A priority Critical patent/CA998772A/en
Priority to CA239,797A priority patent/CA994475A/en
Application granted granted Critical
Publication of CA991311A publication Critical patent/CA991311A/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]
CA146,838A 1971-12-30 1972-07-11 Digital transmission system with frequency weighted noise reduction Expired CA991311A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA239,798A CA998772A (en) 1971-12-30 1975-11-17 Digital transmission system with frequency weighted noise reduction
CA239,797A CA994475A (en) 1971-12-30 1975-11-17 Digital transmission system with frequency weighted noise reduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US21405171A 1971-12-30 1971-12-30

Publications (1)

Publication Number Publication Date
CA991311A true CA991311A (en) 1976-06-15

Family

ID=22797582

Family Applications (1)

Application Number Title Priority Date Filing Date
CA146,838A Expired CA991311A (en) 1971-12-30 1972-07-11 Digital transmission system with frequency weighted noise reduction

Country Status (10)

Country Link
US (1) US3745562A (fr)
JP (1) JPS5639577B2 (fr)
BE (1) BE793564A (fr)
CA (1) CA991311A (fr)
DE (1) DE2263757C2 (fr)
FR (1) FR2166220A1 (fr)
GB (1) GB1370710A (fr)
IT (1) IT976174B (fr)
NL (1) NL7217828A (fr)
SE (1) SE387796B (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123750A (en) * 1973-11-29 1978-10-31 Dynamics Research Corporation Signal processor for position encoder
FR2312884A1 (fr) * 1975-05-27 1976-12-24 Ibm France Procede de quantification par blocs d'echantillons d'un signal electrique, et dispositif de mise en oeuvre dudit procede
US4059800A (en) * 1976-06-30 1977-11-22 International Business Machines Corporation Digital multi-line companded delta modulator
JPS5952576B2 (ja) * 1979-07-13 1984-12-20 株式会社東芝 Ａ／ｄ変換器の安定化回路
FR2463549A1 (fr) * 1979-08-10 1981-02-20 Telecommunications Sa Dispositif de reduction du debit numerique d'informations codees
FR2492612A1 (fr) * 1980-10-16 1982-04-23 Mecilec Sa Procede et dispositif de conversion analogique numerique incrementale
US4700362A (en) * 1983-10-07 1987-10-13 Dolby Laboratories Licensing Corporation A-D encoder and D-A decoder system
US5150120A (en) * 1991-01-03 1992-09-22 Harris Corp. Multiplexed sigma-delta A/D converter
JP3749752B2 (ja) * 1995-03-24 2006-03-01 アイティーティー・マニュファクチャリング・エンタープライジズ・インコーポレーテッド ブロック適応型差分パルスコード変調システム
GB9509831D0 (en) * 1995-05-15 1995-07-05 Gerzon Michael A Lossless coding method for waveform data
GB0113627D0 (en) * 2001-06-05 2001-07-25 Univ Stirling Controller and method of controlling an apparatus
US10404237B2 (en) 2015-08-27 2019-09-03 Osaka University Fluctuation oscillator, signal detection device, and display device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2927962A (en) * 1954-04-26 1960-03-08 Bell Telephone Labor Inc Transmission systems employing quantization
US3631520A (en) * 1968-08-19 1971-12-28 Bell Telephone Labor Inc Predictive coding of speech signals
US3628148A (en) * 1969-12-23 1971-12-14 Bell Telephone Labor Inc Adaptive delta modulation system
US3621396A (en) * 1970-05-08 1971-11-16 Bell Telephone Labor Inc Delta modulation information transmission system
US3742138A (en) * 1971-08-30 1973-06-26 Bell Telephone Labor Inc Predictive delayed encoders

Also Published As

Publication number Publication date
DE2263757C2 (de) 1982-11-18
SE387796B (sv) 1976-09-13
JPS5639577B2 (fr) 1981-09-14
US3745562A (en) 1973-07-10
FR2166220A1 (fr) 1973-08-10
GB1370710A (en) 1974-10-16
DE2263757A1 (de) 1973-07-05
BE793564A (fr) 1973-04-16
JPS4875161A (fr) 1973-10-09
IT976174B (it) 1974-08-20
NL7217828A (fr) 1973-07-03

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