JPS56107648A - Noise reduction circuit - Google Patents

Noise reduction circuit

Info

Publication number: JPS56107648A
Authority: JP; Japan
Prior art keywords: pass; input; level; characteristic; accordance
Prior art date: 1980-01-30
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.): Granted

Application number

JP985780A

Other languages

English (en)

Japanese (ja)

Other versions

JPS6232850B2 (it

Inventor

Kenzo Akagiri

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.)

Sony Corp

Original Assignee

Sony 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.)

1980-01-30

Filing date

1980-01-30

Publication date

1981-08-26

1980-01-30 Application filed by Sony Corp filed Critical Sony Corp

1980-01-30 Priority to JP985780A priority Critical patent/JPS56107648A/ja

1981-01-16 Priority to CA000368692A priority patent/CA1158172A/en

1981-01-20 Priority to AU66358/81A priority patent/AU539233B2/en

1981-01-22 Priority to GB8101908A priority patent/GB2068197B/en

1981-01-27 Priority to FR8101527A priority patent/FR2474736A1/fr

1981-01-28 Priority to IT19388/81A priority patent/IT1135216B/it

1981-01-28 Priority to AT0035781A priority patent/AT381194B/de

1981-01-28 Priority to NL8100412A priority patent/NL8100412A/nl

1981-01-29 Priority to CH579/81A priority patent/CH657485A5/de

1981-01-29 Priority to BE2/58985A priority patent/BE887278A/fr

1981-01-30 Priority to DE3103237A priority patent/DE3103237C2/de

1981-08-26 Publication of JPS56107648A publication Critical patent/JPS56107648A/ja

1987-07-17 Publication of JPS6232850B2 publication Critical patent/JPS6232850B2/ja

Status Granted legal-status Critical Current

Links

Classifications

- 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
- 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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference

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)
Noise Elimination (AREA)

JP985780A 1980-01-30 1980-01-30 Noise reduction circuit Granted JPS56107648A (en)

Priority Applications (11)

Application Number	Priority Date	Filing Date	Title
JP985780A JPS56107648A (en)	1980-01-30	1980-01-30	Noise reduction circuit
CA000368692A CA1158172A (en)	1980-01-30	1981-01-16	Noise reduction circuit
AU66358/81A AU539233B2 (en)	1980-01-30	1981-01-20	Noise reduction
GB8101908A GB2068197B (en)	1980-01-30	1981-01-22	Noise reduction circuits
FR8101527A FR2474736A1 (fr)	1980-01-30	1981-01-27	Circuit reducteur de bruit pour un appareil d'enregistrement
IT19388/81A IT1135216B (it)	1980-01-30	1981-01-28	Circuito di riduzione del rumore
AT0035781A AT381194B (de)	1980-01-30	1981-01-28	Stufe zur stoerungsunterdrueckung
NL8100412A NL8100412A (nl)	1980-01-30	1981-01-28	Schakeling voor ruisvermindering.
CH579/81A CH657485A5 (de)	1980-01-30	1981-01-29	Schaltung zur geraeuschreduktion.
BE2/58985A BE887278A (fr)	1980-01-30	1981-01-29	Circuit pour la reduction de bruits
DE3103237A DE3103237C2 (de)	1980-01-30	1981-01-30	Schaltungsanordnung für Kompander zur Rauschabstandsvergrößerung

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
JP985780A JPS56107648A (en)	1980-01-30	1980-01-30	Noise reduction circuit

Publications (2)

Publication Number	Publication Date
JPS56107648A true JPS56107648A (en)	1981-08-26
JPS6232850B2 JPS6232850B2 (it)	1987-07-17

Family

ID=11731797

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
JP985780A Granted JPS56107648A (en)	1980-01-30	1980-01-30	Noise reduction circuit

Country Status (11)

Country	Link
JP (1)	JPS56107648A (it)
AT (1)	AT381194B (it)
AU (1)	AU539233B2 (it)
BE (1)	BE887278A (it)
CA (1)	CA1158172A (it)
CH (1)	CH657485A5 (it)
DE (1)	DE3103237C2 (it)
FR (1)	FR2474736A1 (it)
GB (1)	GB2068197B (it)
IT (1)	IT1135216B (it)
NL (1)	NL8100412A (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS63281271A (ja) *	1987-05-13	1988-11-17	Mitsubishi Electric Corp	ノイズリダクシヨン回路

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4490691A (en) *	1980-06-30	1984-12-25	Dolby Ray Milton	Compressor-expander circuits and, circuit arrangements for modifying dynamic range, for suppressing mid-frequency modulation effects and for reducing media overload
US5424881A (en)	1993-02-01	1995-06-13	Cirrus Logic, Inc.	Synchronous read channel

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3846719A (en) *	1973-09-13	1974-11-05	Dolby Laboratories Inc	Noise reduction systems
US3678416A (en) *	1971-07-26	1972-07-18	Richard S Burwen	Dynamic noise filter having means for varying cutoff point
US3789143A (en) *	1971-03-29	1974-01-29	D Blackmer	Compander with control signal logarithmically related to the instantaneous rms value of the input signal
GB1367002A (en) *	1971-04-06	1974-09-18	Victor Company Of Japan	Compression and/or expansion system and circuit
US3732371A (en) *	1971-05-10	1973-05-08	Richard S Burwen	Wide dynamic range noise masking compandor
GB1438711A (en) *	1973-01-23	1976-06-09	Dolby Laboratories Inc	Calibration oscillators for noise reduction systems
GB1473833A (en) *	1973-05-17	1977-05-18	Dolby Laboratories Inc	Circuit for the dynamic range of a signal
US3902131A (en) *	1974-09-06	1975-08-26	Quadracast Systems	Tandem audio dynamic range expander
JPS52142409A (en) *	1976-05-21	1977-11-28	Toshiba Corp	Noise reduction system
JPS53121506A (en) *	1977-03-31	1978-10-24	Pioneer Electronic Corp	Signal compressing and expanding device
JPS5439516A (en) *	1977-09-02	1979-03-27	Sanyo Electric Co Ltd	Noise reduction unit

1980
- 1980-01-30 JP JP985780A patent/JPS56107648A/ja active Granted
1981
- 1981-01-16 CA CA000368692A patent/CA1158172A/en not_active Expired
- 1981-01-20 AU AU66358/81A patent/AU539233B2/en not_active Ceased
- 1981-01-22 GB GB8101908A patent/GB2068197B/en not_active Expired
- 1981-01-27 FR FR8101527A patent/FR2474736A1/fr active Granted
- 1981-01-28 AT AT0035781A patent/AT381194B/de not_active IP Right Cessation
- 1981-01-28 NL NL8100412A patent/NL8100412A/nl not_active Application Discontinuation
- 1981-01-28 IT IT19388/81A patent/IT1135216B/it active
- 1981-01-29 BE BE2/58985A patent/BE887278A/fr not_active IP Right Cessation
- 1981-01-29 CH CH579/81A patent/CH657485A5/de not_active IP Right Cessation
- 1981-01-30 DE DE3103237A patent/DE3103237C2/de not_active Expired - Fee Related

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS63281271A (ja) *	1987-05-13	1988-11-17	Mitsubishi Electric Corp	ノイズリダクシヨン回路
JPH0775103B2 (ja) *	1987-05-13	1995-08-09	三菱電機株式会社	ノイズリダクシヨン回路

Also Published As

Publication number	Publication date
CH657485A5 (de)	1986-08-29
JPS6232850B2 (it)	1987-07-17
IT8119388A0 (it)	1981-01-28
AU539233B2 (en)	1984-09-20
FR2474736A1 (fr)	1981-07-31
GB2068197B (en)	1984-08-08
NL8100412A (nl)	1981-09-01
DE3103237A1 (de)	1981-12-03
ATA35781A (de)	1986-01-15
IT1135216B (it)	1986-08-20
AT381194B (de)	1986-09-10
CA1158172A (en)	1983-12-06
DE3103237C2 (de)	1993-10-14
FR2474736B1 (it)	1984-11-23
AU6635881A (en)	1981-08-06
BE887278A (fr)	1981-05-14
GB2068197A (en)	1981-08-05

Publication	Publication Date	Title
EP0328346A3 (en)	1991-04-24	Noise reduction circuits
JPS5733834A (en)	1982-02-24	Frequency modulation noise reducing circuit
JPS54142009A (en)	1979-11-05	Amplitude equalizer
JPS5475922A (en)	1979-06-18	Pulse noise limiter circuit
JPS51127608A (en)	1976-11-06	Signal transmitting unit
JPS56107648A (en)	1981-08-26	Noise reduction circuit
JPS53117363A (en)	1978-10-13	Modulator
JPS56106433A (en)	1981-08-24	Noise reducing circuit
JPS5752240A (en)	1982-03-27	Noise reducing circuit
JPS5593235A (en)	1980-07-15	Integrated circuit
JPS5733836A (en)	1982-02-24	Automatic noise reducing circuit
JPS5793787A (en)	1982-06-10	Signal reproducing circuit
JPS56120248A (en)	1981-09-21	Differential reception circuit
JPS5552643A (en)	1980-04-17	Noise reduction unit
JPS5530268A (en)	1980-03-04	Noise reduction unit
JPS56149823A (en)	1981-11-19	Band pass filter
JPS5593311A (en)	1980-07-15	Loudness circuit unit
JPS5367401A (en)	1978-06-15	Processing circuit of input angle modulated wave signal in demodulationcircuit of angle modulated wave signal reproduced from multichannel discerecorder
JPS56157133A (en)	1981-12-04	Receiver
JPS5752242A (en)	1982-03-27	Noise reducing circuit
JPS5443448A (en)	1979-04-06	Compressor
JPS5459055A (en)	1979-05-12	Variable attenuator to signals at specified frequency band
JPS5724113A (en)	1982-02-08	Digital filter device
JPS52104019A (en)	1977-09-01	Ghost suppresser
JPS5647112A (en)	1981-04-28	Am receiver