DE3279093D1 - Digital data companding - Google Patents

Digital data companding

Info

Publication number
DE3279093D1
DE3279093D1 DE8282301972T DE3279093T DE3279093D1 DE 3279093 D1 DE3279093 D1 DE 3279093D1 DE 8282301972 T DE8282301972 T DE 8282301972T DE 3279093 T DE3279093 T DE 3279093T DE 3279093 D1 DE3279093 D1 DE 3279093D1
Authority
DE
Germany
Prior art keywords
digital data
data companding
companding
digital
data
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
DE8282301972T
Other languages
English (en)
Inventor
Hiroo Okamoto
Takao Arai
Takashi Hoshino
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
Priority claimed from JP5853281A external-priority patent/JPS57173239A/ja
Priority claimed from JP3798682A external-priority patent/JPS58156239A/ja
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Application granted granted Critical
Publication of DE3279093D1 publication Critical patent/DE3279093D1/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/007—Volume compression or expansion in amplifiers of digital or coded signals
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
DE8282301972T 1981-04-20 1982-04-16 Digital data companding Expired DE3279093D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5853281A JPS57173239A (en) 1981-04-20 1981-04-20 Polygonal line compressing and expanding circuit
JP3798682A JPS58156239A (ja) 1982-03-12 1982-03-12 折線圧縮伸張回路

Publications (1)

Publication Number Publication Date
DE3279093D1 true DE3279093D1 (de) 1988-11-10

Family

ID=26377167

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8282301972T Expired DE3279093D1 (de) 1981-04-20 1982-04-16 Digital data companding

Country Status (3)

Country Link
US (1) US4682152A (de)
EP (1) EP0063485B1 (de)
DE (1) DE3279093D1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8300468A (nl) * 1983-02-08 1984-09-03 Philips Nv Digitale dynamiek omzetter.
JP2702126B2 (ja) * 1987-08-20 1998-01-21 パイオニア株式会社 データ出力回路
DE69023803T2 (de) * 1989-04-27 1996-08-08 Matsushita Electric Ind Co Ltd Daten-Kompandierungsverfahren und Daten-Kompressor/Dehner.
JP2775857B2 (ja) * 1989-06-20 1998-07-16 ソニー株式会社 デジタル信号の帯域圧縮回路
US5629884A (en) * 1995-07-28 1997-05-13 Motorola, Inc. Log converter utilizing offset and method of use thereof
KR100378162B1 (ko) * 2000-01-11 2003-03-29 삼성전자주식회사 룩업 테이블을 이용한 연산결과 검출장치 및 방법
US6883012B1 (en) 2001-03-19 2005-04-19 Cisco Systems Wireless Networking (Australia) Pty Limited Linear-to-log converter for power estimation in a wireless data network receiver
US7671778B2 (en) * 2003-06-18 2010-03-02 General Instrument Corporation Digital signal processing scheme for high performance HFC digital return path system with bandwidth conservation
DE102004041418A1 (de) * 2004-08-26 2006-03-09 Micronas Gmbh Verfahren zur Codierung eines ersten und zweiten Datenwortes und Verfahren zur Decodierung eines codierten Datenwortes

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3610901A (en) * 1969-09-09 1971-10-05 Emerson Electric Co Digital modified discrete fourier transform doppler radar processor
US3694639A (en) * 1970-04-07 1972-09-26 Pierre A Deschenes Pulse code modulation digital compandor
US3863248A (en) * 1973-01-02 1975-01-28 Univ Sherbrooke Digital compressor-expander
JPS5534613B2 (de) * 1973-10-08 1980-09-08
US4078250A (en) * 1974-08-21 1978-03-07 The Singer Company Log-antilog conversion for a digital radar system
DE2505388C2 (de) * 1975-02-08 1983-06-23 Philips Patentverwaltung Gmbh, 2000 Hamburg Anordnung zur logarithmischen Umwandlung eines Meßwertes
US4058676A (en) * 1975-07-07 1977-11-15 International Communication Sciences Speech analysis and synthesis system
US4267579A (en) * 1979-07-13 1981-05-12 Norlin Industries, Inc. Digital waveform generator having constant signal to noise ratio
US4342245A (en) * 1979-10-26 1982-08-03 Norlin Industries, Inc. Complex waveform generator for musical instrument
US4326260A (en) * 1980-07-07 1982-04-20 Norlin Industries, Inc. Linear piecewise waveform generator for an electronic musical instrument

Also Published As

Publication number Publication date
EP0063485B1 (de) 1988-10-05
EP0063485A3 (en) 1984-06-06
EP0063485A2 (de) 1982-10-27
US4682152A (en) 1987-07-21

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Free format text: STREHL, P., DIPL.-ING. DIPL.-WIRTSCH.-ING. SCHUEBEL-HOPF, U., DIPL.-CHEM. DR.RER.NAT. GROENING, H., DIPL.-ING., PAT.-ANWAELTE, 8000 MUENCHEN

8339 Ceased/non-payment of the annual fee