DK478984A - Kredsloeb til forbetoning og betoningsudligning af et spektrum - Google Patents

Kredsloeb til forbetoning og betoningsudligning af et spektrum Download PDF

Info

Publication number: DK478984A
Authority: DK; Denmark
Prior art keywords: concentration; spectrum; circuit; equality; concentration equality
Prior art date: 1983-10-07

Application number

DK478984A

Other languages

English (en)

Other versions

DK478984D0 (da

DK169693B1 (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.)

1983-10-07

Filing date

1984-10-05

Publication date

1985-04-08

1984-08-21 Priority claimed from US06/642,044 external-priority patent/US4700361A/en

1984-10-05 Application filed by Dolby Lab Licensing Corp filed Critical Dolby Lab Licensing Corp

1984-10-05 Publication of DK478984D0 publication Critical patent/DK478984D0/da

1985-04-08 Publication of DK478984A publication Critical patent/DK478984A/da

1995-01-09 Application granted granted Critical

1995-01-09 Publication of DK169693B1 publication Critical patent/DK169693B1/da

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

Publications (3)

Publication Number	Publication Date
DK478984D0 DK478984D0 (da)	1984-10-05
DK478984A true DK478984A (da)	1985-04-08
DK169693B1 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 (da)
KR (1)	KR950015080B1 (da)
BR (1)	BR8405048A (da)
CA (1)	CA1236405A (da)
DE (1)	DE3485473D1 (da)
DK (1)	DK169693B1 (da)
ES (3)	ES8607646A1 (da)
NO (1)	NO172669C (da)

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

1984
- 1984-09-28 KR KR1019840006014A patent/KR950015080B1/ko not_active Expired - Lifetime
- 1984-10-05 ES ES536553A patent/ES8607646A1/es not_active Expired
- 1984-10-05 DK DK478984A patent/DK169693B1/da not_active IP Right Cessation
- 1984-10-05 BR BR8405048A patent/BR8405048A/pt not_active IP Right Cessation
- 1984-10-05 CA CA000464817A patent/CA1236405A/en not_active Expired
- 1984-10-05 NO NO844015A patent/NO172669C/no not_active IP Right Cessation
- 1984-10-08 DE DE8484306848T patent/DE3485473D1/de not_active Expired - Lifetime
- 1984-10-08 EP EP84306848A patent/EP0138547B1/en not_active Expired - Lifetime
1985
- 1985-11-16 ES ES548973A patent/ES8704682A1/es not_active Expired
- 1985-11-16 ES ES548972A patent/ES8704681A1/es not_active Expired

Also Published As

Publication number	Publication date
KR850003086A (ko)	1985-05-28
NO844015L (no)	1985-04-09
NO172669C (no)	1993-08-18
ES548972A0 (es)	1987-04-01
CA1236405A (en)	1988-05-10
DK478984D0 (da)	1984-10-05
BR8405048A (pt)	1985-08-20
ES536553A0 (es)	1986-05-16
EP0138547A3 (en)	1988-02-24
DK169693B1 (da)	1995-01-09
ES548973A0 (es)	1987-04-01
DE3485473D1 (de)	1992-03-05
EP0138547B1 (en)	1992-01-22
EP0138547A2 (en)	1985-04-24
ES8704682A1 (es)	1987-04-01
KR950015080B1 (ko)	1995-12-21
ES8607646A1 (es)	1986-05-16
NO172669B (no)	1993-05-10
ES8704681A1 (es)	1987-04-01

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Legal Events

Date	Code	Title	Description
1995-01-09	B1	Patent granted (law 1993)
2004-10-25	PUP	Patent expired