NL147297B - Inrichting voor ruisverzwakking. - Google Patents

Inrichting voor ruisverzwakking.

Info

Publication number
NL147297B
NL147297B NL6611156A NL6611156A NL147297B NL 147297 B NL147297 B NL 147297B NL 6611156 A NL6611156 A NL 6611156A NL 6611156 A NL6611156 A NL 6611156A NL 147297 B NL147297 B NL 147297B
Authority
NL
Netherlands
Prior art keywords
noise reduction
reduction device
noise
reduction
Prior art date
Application number
NL6611156A
Other languages
English (en)
Other versions
NL6611156A (nl
Original Assignee
Dolby Ray Milton
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 Dolby Ray Milton filed Critical Dolby Ray Milton
Publication of NL6611156A publication Critical patent/NL6611156A/xx
Publication of NL147297B publication Critical patent/NL147297B/nl

Links

Classifications

    • 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
    • H04B1/64—Volume compression or expansion arrangements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/002—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general without controlling loop
    • 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
    • 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
    • H03G9/12—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices
    • H03G9/18—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices for tone control and volume expansion or compression

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
NL6611156A 1965-08-11 1966-08-08 Inrichting voor ruisverzwakking. NL147297B (nl)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB3439465A GB1120541A (en) 1965-08-11 1965-08-11 Improvements in noise reduction systems
GB4313665 1965-10-11
GB236866 1966-01-18

Publications (2)

Publication Number Publication Date
NL6611156A NL6611156A (nl) 1967-02-13
NL147297B true NL147297B (nl) 1975-09-15

Family

ID=27254067

Family Applications (1)

Application Number Title Priority Date Filing Date
NL6611156A NL147297B (nl) 1965-08-11 1966-08-08 Inrichting voor ruisverzwakking.

Country Status (6)

Country Link
JP (4) JPS4841044B1 (nl)
BE (1) BE712376A (nl)
CH (1) CH467560A (nl)
DE (1) DE1487276C3 (nl)
GB (1) GB1120541A (nl)
NL (1) NL147297B (nl)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1338227A (en) * 1970-01-23 1973-11-21 Dalby Lab Inc Limiters for noise reduction systems
GB1390341A (en) * 1971-03-12 1975-04-09 Dolby Laboratories Inc Signal compressors and expanders
NL163388C (nl) * 1971-05-04 1980-08-15 Philips Nv Ruisonderdrukkingsschakeling.
US3729693A (en) * 1971-08-02 1973-04-24 R Dolby Compressor/expander switching methods and apparatus
GB1438711A (en) * 1973-01-23 1976-06-09 Dolby Laboratories Inc Calibration oscillators for noise reduction systems
US3909733A (en) * 1973-05-17 1975-09-30 Dolby Laboratories Inc Dynamic range modifying circuits utilizing variable negative resistance
DE2530144C3 (de) * 1975-07-05 1981-11-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verstärker mit veränderbarem Übertragungsmaß
DE2542745C2 (de) * 1975-09-25 1983-06-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verstärker mit veränderbarem Übertragungsmaß, insbesondere für ein Kompander-System
DE2655325C2 (de) * 1976-12-07 1984-01-26 Saba Gmbh, 7730 Villingen-Schwenningen Magnetbandgerät mit einer im Wiedergabebetrieb wirksamen Rauschunterdrückungs-Schaltung
GB2002204B (en) * 1977-08-06 1982-01-27 Licentia Gmbh Dynamic compression or expansion circuits
JPS5439516A (en) * 1977-09-02 1979-03-27 Sanyo Electric Co Ltd Noise reduction unit
JPS55156431A (en) * 1979-05-24 1980-12-05 Sony Corp Noise reduction system
CA1184506A (en) * 1980-04-21 1985-03-26 Akira Komatsu Method and system for discriminating human voice signal
US4540946A (en) * 1980-06-06 1985-09-10 National Research Development Corp. Variable characteristic filters
DE3029441A1 (de) * 1980-08-02 1982-03-04 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Signaluebertragungsschaltung mit steuerbarem uebertragungsmass
JPS5744338A (en) * 1980-08-29 1982-03-12 Victor Co Of Japan Ltd Noise reduction device
FR2490856B1 (fr) * 1980-09-22 1985-09-27 Elison Sarl Appareil pour la reduction du bruit de fond du type a analyse spectrale en temps reel
JPS5769891A (en) * 1980-10-17 1982-04-28 Tokyo Shibaura Electric Co Washing machine doubling as hydroextracting
JPS57138009A (en) * 1981-02-20 1982-08-26 Hitachi Ltd Magnetic recorder and reproducer
JPS57140085A (en) * 1981-02-23 1982-08-30 Hitachi Ltd Audio signal recording and reproducing circuit
JPS5866064A (ja) * 1981-10-15 1983-04-20 Toshiba Corp レベル検出回路
GB2111355B (en) * 1981-12-01 1985-02-13 Ray Milton Dolby Improvements in circuit arrangements for modifying dynamic range
DE3305938A1 (de) * 1983-02-21 1984-08-23 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Schaltungsanordnung zur erzeugung einer von einer wechselspannung abhaengigen steuergleichspannung
DE3323751C1 (de) * 1983-07-01 1984-11-22 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover System zur UEbertragung eines frequenzmodulierten Tontraegers
JPS60111137A (ja) * 1983-11-18 1985-06-17 Shimadzu Corp 定荷重材料試験機
GB2189366B (en) * 1986-04-17 1989-12-28 British Broadcasting Corp Method and apparatus for conveying information signals
US5067157A (en) * 1989-02-03 1991-11-19 Pioneer Electronic Corporation Noise reduction apparatus in an FM stereo tuner
US5253299A (en) * 1989-02-03 1993-10-12 Pioneer Electronic Corporation Noise reduction apparatus in an FM stereo tuner
KR920007607B1 (ko) * 1989-09-01 1992-09-08 삼성전자 주식회사 디지탈 텔레비젼 수상기에 있어서 콘트라스트 조정회로

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE754298C (de) * 1935-07-04 1952-07-17 Emi Ltd Niederfrequentes UEbertragungssystem mit selbsttaetiger Amplituden-regelung durch eine quer zum UEbertragungsweg geschaltete Impedanz-Mehrgitterroehre
US2171671A (en) * 1936-05-20 1939-09-05 Emi Ltd Thermionic valve circuit
GB643574A (en) * 1946-01-19 1950-09-20 Hermon Hosmer Scott Improvements in apparatus or systems for transmitting electric signals
US2817715A (en) * 1952-07-15 1957-12-24 California Research Corp Amplifier circuit having linear and non-linear amplification ranges
US2925529A (en) * 1952-11-04 1960-02-16 Bell Telephone Labor Inc Non-linear transmission circuits
DE1048950B (de) * 1956-07-19 1959-01-22 Siemens Ag Nachrichtenuebertragungssystem mit einer Anordnung zur Geraeuschunterdrueckung
US2969459A (en) * 1957-11-14 1961-01-24 Collins Radio Co Method and means for reducing the threshold of angular-modulation receivers
GB856892A (en) * 1957-11-14 1960-12-21 Collins Radio Co Means for reducing the threshold of angular-modulation receivers
DE1120171B (de) * 1959-12-24 1961-12-21 Carl Lindstroem Ges M B H Verfahren zur Erhoehung der mittleren Aussteuerung von Tonaufnahmen
US3111635A (en) * 1960-05-05 1963-11-19 Fairchild Recording Equipment Method and apparatus for eliminating overloading in modulating systems having pre-emphasis means
FR1374370A (fr) * 1963-06-07 1964-10-09 Emi Ltd Perfectionnements à l'enregistrement et la transmission des sons
FR1392138A (fr) * 1964-04-08 1965-03-12 Rca Corp Dispositif pour la transmission de sons audibles

Also Published As

Publication number Publication date
DE1487276A1 (de) 1969-03-20
NL6611156A (nl) 1967-02-13
BE712376A (nl) 1968-07-31
CH467560A (de) 1969-01-15
DE1487276B2 (de) 1975-02-20
JPS4841044B1 (nl) 1973-12-04
DE1487276C3 (de) 1982-01-07
JPS5114842B1 (nl) 1976-05-12
GB1120541A (en) 1968-07-17
JPS4842361B1 (nl) 1973-12-12
JPS5026887B1 (nl) 1975-09-04

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Legal Events

Date Code Title Description
NL80 Abbreviated name of patent owner mentioned of already nullified patent

Owner name: DOLBY

V4 Lapsed because of reaching the maxim lifetime of a patent