DK169693B1 - Fremgangsmåde og kredsløbsanordning for spektral korrektion og efterkorrektion - Google Patents

Fremgangsmåde og kredsløbsanordning for spektral korrektion og efterkorrektion Download PDF

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Publication number
DK169693B1
DK169693B1 DK478984A DK478984A DK169693B1 DK 169693 B1 DK169693 B1 DK 169693B1 DK 478984 A DK478984 A DK 478984A DK 478984 A DK478984 A DK 478984A DK 169693 B1 DK169693 B1 DK 169693B1
Authority
DK
Denmark
Prior art keywords
circuit
signal
control signal
correction
spectral
Prior art date
Application number
DK478984A
Other languages
Danish (da)
English (en)
Other versions
DK478984A (da
DK478984D0 (da
Inventor
Kenneth James Gundry
Craig C Todd
Original Assignee
Dolby Lab Licensing Corp
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 US06/642,044 external-priority patent/US4700361A/en
Application filed by Dolby Lab Licensing Corp filed Critical Dolby Lab Licensing Corp
Publication of DK478984D0 publication Critical patent/DK478984D0/da
Publication of DK478984A publication Critical patent/DK478984A/da
Application granted granted Critical
Publication of DK169693B1 publication Critical patent/DK169693B1/da

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/06—Volume compression or expansion in amplifiers having semiconductor devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/02—Delta modulation, i.e. one-bit differential modulation
    • H03M3/022—Delta modulation, i.e. one-bit differential modulation with adaptable step size, e.g. adaptive delta modulation [ADM]
    • 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
    • H04B14/06—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Television Signal Processing For Recording (AREA)
DK478984A 1983-10-07 1984-10-05 Fremgangsmåde og kredsløbsanordning for spektral korrektion og efterkorrektion DK169693B1 (da)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US54042183A 1983-10-07 1983-10-07
US54019583A 1983-10-07 1983-10-07
US54042183 1983-10-07
US54019583 1983-10-07
US06/642,044 US4700361A (en) 1983-10-07 1984-08-21 Spectral emphasis and de-emphasis
US64204484 1984-08-21

Publications (3)

Publication Number Publication Date
DK478984D0 DK478984D0 (da) 1984-10-05
DK478984A DK478984A (da) 1985-04-08
DK169693B1 true DK169693B1 (da) 1995-01-09

Family

ID=27415316

Family Applications (1)

Application Number Title Priority Date Filing Date
DK478984A DK169693B1 (da) 1983-10-07 1984-10-05 Fremgangsmåde og kredsløbsanordning for spektral korrektion og efterkorrektion

Country Status (8)

Country Link
EP (1) EP0138547B1 (fr)
KR (1) KR950015080B1 (fr)
BR (1) BR8405048A (fr)
CA (1) CA1236405A (fr)
DE (1) DE3485473D1 (fr)
DK (1) DK169693B1 (fr)
ES (3) ES8607646A1 (fr)
NO (1) NO172669C (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907087A (en) * 1987-06-10 1990-03-06 Massachusetts Institute Of Technology Transmission of signals through analog channels using adaptive frequency modulation
JPH0575366A (ja) * 1991-09-10 1993-03-26 Pioneer Electron Corp オーデイオ装置における信号処理回路
US5659581A (en) * 1994-12-13 1997-08-19 Paradyne Corporation Modem receiver pre-emphasis

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678416A (en) * 1971-07-26 1972-07-18 Richard S Burwen Dynamic noise filter having means for varying cutoff point
US4101849A (en) * 1976-11-08 1978-07-18 Dbx, Inc. Adaptive filter

Also Published As

Publication number Publication date
EP0138547A3 (en) 1988-02-24
NO172669B (no) 1993-05-10
KR950015080B1 (ko) 1995-12-21
DK478984A (da) 1985-04-08
NO172669C (no) 1993-08-18
DE3485473D1 (de) 1992-03-05
ES548972A0 (es) 1987-04-01
EP0138547B1 (fr) 1992-01-22
ES8607646A1 (es) 1986-05-16
EP0138547A2 (fr) 1985-04-24
ES536553A0 (es) 1986-05-16
ES548973A0 (es) 1987-04-01
DK478984D0 (da) 1984-10-05
NO844015L (no) 1985-04-09
KR850003086A (ko) 1985-05-28
ES8704681A1 (es) 1987-04-01
BR8405048A (pt) 1985-08-20
ES8704682A1 (es) 1987-04-01
CA1236405A (fr) 1988-05-10

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Legal Events

Date Code Title Description
B1 Patent granted (law 1993)
PUP Patent expired