FR2474736B1 - - Google Patents

Info

Publication number: FR2474736B1
Authority: FR; France
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

FR8101527A

Other versions

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

1981-01-27

Publication date

1984-11-23

1981-01-27 Application filed by Sony Corp filed Critical Sony Corp

1981-07-31 Publication of FR2474736A1 publication Critical patent/FR2474736A1/fr

1984-11-23 Application granted granted Critical

1984-11-23 Publication of FR2474736B1 publication Critical patent/FR2474736B1/fr

Status Granted legal-status Critical Current

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)

FR8101527A 1980-01-30 1981-01-27 Circuit reducteur de bruit pour un appareil d'enregistrement Granted FR2474736A1 (fr)

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
FR2474736A1 FR2474736A1 (fr)	1981-07-31
FR2474736B1 true FR2474736B1 (fr)	1984-11-23

Family

ID=11731797

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR8101527A Granted FR2474736A1 (fr)	1980-01-30	1981-01-27	Circuit reducteur de bruit pour un appareil d'enregistrement

Country Status (11)

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

Families Citing this family (3)

* 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
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
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
FI57502C (fi) *	1971-04-06	1980-08-11	Victor Company Of Japan	Kompressions- och expansionssystem
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/fr 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 NL NL8100412A patent/NL8100412A/nl not_active Application Discontinuation
- 1981-01-28 IT IT19388/81A patent/IT1135216B/it active
- 1981-01-28 AT AT0035781A patent/AT381194B/de not_active IP Right Cessation
- 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

Also Published As

Publication number	Publication date
AT381194B (de)	1986-09-10
IT1135216B (it)	1986-08-20
DE3103237C2 (de)	1993-10-14
JPS6232850B2 (fr)	1987-07-17
GB2068197A (en)	1981-08-05
NL8100412A (nl)	1981-09-01
IT8119388A0 (it)	1981-01-28
CH657485A5 (de)	1986-08-29
DE3103237A1 (de)	1981-12-03
AU6635881A (en)	1981-08-06
CA1158172A (fr)	1983-12-06
FR2474736A1 (fr)	1981-07-31
BE887278A (fr)	1981-05-14
AU539233B2 (en)	1984-09-20
GB2068197B (en)	1984-08-08
JPS56107648A (en)	1981-08-26
ATA35781A (de)	1986-01-15

Publication	Publication Date	Title
FR2473093B1 (fr)	1985-04-19
FR2474193B1 (fr)	1983-11-10
FR2474911B1 (fr)	1985-01-04
FR2473037B1 (fr)	1984-04-06
FR2474905B1 (fr)	1983-02-11
FR2473999B1 (fr)	1984-01-06
FR2474171B1 (fr)	1983-07-22
FR2473342B1 (fr)	1984-03-09
FR2473995B1 (fr)	1983-08-12
FR2473382B1 (fr)	1982-01-22
FR2472955B1 (fr)	1985-01-11
FR2473384B1 (fr)	1985-03-29
FR2474716B1 (fr)	1984-02-10
FR2473103B1 (fr)	1984-12-28
FR2473449B1 (fr)	1983-02-18
DE3153271A1 (fr)	1985-07-04
FR2473842B1 (fr)	1983-12-23
FR2474710B2 (fr)	1983-10-14
DE3148629T1 (fr)	1982-09-23
FR2474276B3 (fr)	1983-05-13
FR2473780B1 (fr)	1984-12-28
FR2473556B1 (fr)	1984-05-18
FR2473146B1 (fr)	1984-10-26
FR2473357B1 (fr)	1982-12-31
FR2474325B3 (fr)	1982-10-29

Legal Events

Date	Code	Title	Description
1996-11-29	ST	Notification of lapse