FR2474736B1 - - Google Patents
Info
- Publication number
- FR2474736B1 FR2474736B1 FR8101527A FR8101527A FR2474736B1 FR 2474736 B1 FR2474736 B1 FR 2474736B1 FR 8101527 A FR8101527 A FR 8101527A FR 8101527 A FR8101527 A FR 8101527A FR 2474736 B1 FR2474736 B1 FR 2474736B1
- 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
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)
- Noise Elimination (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
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 (US07135483-20061114-C00121.png) | 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)
Families Citing this family (3)
| 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)
| 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 NL NL8100412A patent/NL8100412A/nl not_active Application Discontinuation
- 1981-01-28 AT AT0035781A patent/AT381194B/de not_active IP Right Cessation
- 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
Also Published As
| Publication number | Publication date |
|---|---|
| ATA35781A (de) | 1986-01-15 |
| DE3103237C2 (de) | 1993-10-14 |
| FR2474736A1 (fr) | 1981-07-31 |
| GB2068197A (en) | 1981-08-05 |
| AT381194B (de) | 1986-09-10 |
| CH657485A5 (de) | 1986-08-29 |
| AU6635881A (en) | 1981-08-06 |
| NL8100412A (nl) | 1981-09-01 |
| CA1158172A (en) | 1983-12-06 |
| AU539233B2 (en) | 1984-09-20 |
| BE887278A (fr) | 1981-05-14 |
| IT1135216B (it) | 1986-08-20 |
| IT8119388A0 (it) | 1981-01-28 |
| GB2068197B (en) | 1984-08-08 |
| JPS6232850B2 (US07135483-20061114-C00121.png) | 1987-07-17 |
| JPS56107648A (en) | 1981-08-26 |
| DE3103237A1 (de) | 1981-12-03 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |