FI76456C - Kretsanordning för minskning av överbelastningseffekter hos inspelning s- eller transmissionsmedium i inspelnings- och transmissionssystem - Google Patents
Kretsanordning för minskning av överbelastningseffekter hos inspelning s- eller transmissionsmedium i inspelnings- och transmissionssystem Download PDFInfo
- Publication number
- FI76456C FI76456C FI812026A FI812026A FI76456C FI 76456 C FI76456 C FI 76456C FI 812026 A FI812026 A FI 812026A FI 812026 A FI812026 A FI 812026A FI 76456 C FI76456 C FI 76456C
- Authority
- FI
- Finland
- Prior art keywords
- frequency
- expander
- recording
- compressor
- saturation
- Prior art date
Links
- 230000009467 reduction Effects 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 16
- 230000000694 effects Effects 0.000 claims description 16
- 230000001419 dependent effect Effects 0.000 claims description 8
- 238000012937 correction Methods 0.000 description 15
- 230000004044 response Effects 0.000 description 11
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 230000007423 decrease Effects 0.000 description 7
- 230000000295 complement effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000012788 optical film Substances 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 4
- 210000000056 organ Anatomy 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
-
- 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
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Claims (3)
1. Kretsanordning för ändring av dynamikomrädet hos signaler, som mätäs tili eller frän ett inspelnings- eller trans-missionsmedium, dvs. kompressor för inskränkning av dynamikomrädet eller expander för utvidgning av dynamikomrädet, var-vid en kompressor och en expander vid gemensam användning fö-re respektive efter inspelnings- eller transmissionsmediet bildar ett brusreduceringssystem, varvid inspelnings- eller transmissionsmediet kan utsättas för ett mättnings- eller överbelastningstillständ inom det frekvensomräde där kretsan-ordningen ändrar dynamikomradet, vilken kretsanordning omfat-tar minst en krets med en huvudsignalbana som är linjär med avseende pa dynamikomrädet, och en ytterligare bana, som har sin ingäng förbunden med huvudbanans in- eller utgäng och sin utgäng med en kombinationskrets, vilken ytterligare bana via kombinationskretsen avger en signal som ätminstone inom en Övre del av frekvensbandet genom kombinationskretsen i kompres-sorn höjer huvudbanans signal och i expandern motverkar hu-vudbanesignalen, men som är begränsad sä att den, inom Övre delen av ingängsdynamikomrädet, är mindre än huvudbanesigna-len, kännetecknad av att den omfattar frekvensberoende kretsorgan (F ? 74, 76 eller F' ; 78, 80), som kopplats AS AS endast tili huvudbanan (x-y; 10 eller y-z; 14), och som i kompressorn (52, 54) inom en del av frekvensbandet förorsakar en sänkning av frekvenskurvan, varvid mättning eller överbe-lastning av inspelnings- eller transmissionsmediet undvikes, och som i expandern (56, 58) förorsakar en höjning av frek-venskurvan inom denna del av frekvensbandet, varvid frekvens-bandets delar är identiska i kompressorn (52, 54) och i expandern (56, 58) da de tillsammans användes i ett brusreduceringssystem.
2. Kretsanordning enligt patentkravet 1, varvid signa-lerna ligger inom audiofrekvensbandet och inspelnings- eller transmissionsmediet är utsatt för möjlig mättnings- eller överbelastningseffekt frän och med en bestämd frekvens i Övre
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16395080A | 1980-06-30 | 1980-06-30 | |
| US16395080 | 1980-06-30 | ||
| US18077180A | 1980-08-22 | 1980-08-22 | |
| US18077180 | 1980-08-22 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI812026L FI812026L (fi) | 1981-12-31 |
| FI76456B FI76456B (fi) | 1988-06-30 |
| FI76456C true FI76456C (sv) | 1988-10-10 |
Family
ID=26860115
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI812025A FI79428C (sv) | 1980-06-30 | 1981-06-29 | Nät för dämpning av mellanfrekvensmodulationsfenomen hos kompressorer, expandrar och brusdämpningssystem. |
| FI812024A FI74368C (sv) | 1980-06-30 | 1981-06-29 | Kretsarrangemang för modifiering av dynamiskt område. |
| FI812026A FI76456C (sv) | 1980-06-30 | 1981-06-29 | Kretsanordning för minskning av överbelastningseffekter hos inspelning s- eller transmissionsmedium i inspelnings- och transmissionssystem |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI812025A FI79428C (sv) | 1980-06-30 | 1981-06-29 | Nät för dämpning av mellanfrekvensmodulationsfenomen hos kompressorer, expandrar och brusdämpningssystem. |
| FI812024A FI74368C (sv) | 1980-06-30 | 1981-06-29 | Kretsarrangemang för modifiering av dynamiskt område. |
Country Status (17)
| Country | Link |
|---|---|
| KR (4) | KR880000105B1 (sv) |
| AT (3) | AT372796B (sv) |
| AU (3) | AU546641B2 (sv) |
| BR (3) | BR8104158A (sv) |
| CH (3) | CH660653A5 (sv) |
| DE (3) | DE3125789C2 (sv) |
| DK (3) | DK168806B1 (sv) |
| ES (3) | ES503496A0 (sv) |
| FI (3) | FI79428C (sv) |
| GB (3) | GB2079114B (sv) |
| HK (3) | HK28285A (sv) |
| IT (3) | IT1137985B (sv) |
| MY (3) | MY8501147A (sv) |
| NL (3) | NL192652C (sv) |
| NO (3) | NO157399C (sv) |
| SE (3) | SE447525B (sv) |
| SG (3) | SG4385G (sv) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4736433A (en) * | 1985-06-17 | 1988-04-05 | Dolby Ray Milton | Circuit arrangements for modifying dynamic range using action substitution and superposition techniques |
| US4815068A (en) * | 1987-08-07 | 1989-03-21 | Dolby Ray Milton | Audio encoder for use with more than one decoder each having different characteristics |
| US5651028A (en) * | 1995-05-09 | 1997-07-22 | Unisys Corporation | Data transmission system with a low peak-to-average power ratio based on distorting frequently occuring signals |
| US5793797A (en) * | 1995-05-09 | 1998-08-11 | Unisys Corporation | Data transmisson system with a low peak-to-average power ratio based on distorting small amplitude signals |
| DE10011193B4 (de) * | 2000-03-08 | 2004-02-05 | Sennheiser Electronic Gmbh & Co. Kg | Kompandersystem mit einer Kompressorschaltung und einer Expanderschaltung |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US28426A (en) * | 1860-05-22 | Shortening tires | ||
| US2558002A (en) * | 1939-10-24 | 1951-06-26 | Int Standard Electric Corp | Volume compression system |
| US3022473A (en) * | 1959-08-18 | 1962-02-20 | Bell Telephone Labor Inc | Signal recovery circuits |
| US3846719A (en) * | 1973-09-13 | 1974-11-05 | Dolby Laboratories Inc | Noise reduction systems |
| GB1253031A (sv) * | 1968-01-10 | 1971-11-10 | ||
| US3903485A (en) * | 1968-01-10 | 1975-09-02 | Ray Milton Dolby | Compressors, expanders and noise reduction systems |
| USRE28426E (en) * | 1968-11-01 | 1975-05-20 | Signal compressors and expanders | |
| US3757254A (en) * | 1970-06-05 | 1973-09-04 | Victor Co Ltd | N system noise reduction system and apparatus using a compression and expansio |
| GB1390341A (en) * | 1971-03-12 | 1975-04-09 | Dolby Laboratories Inc | Signal compressors and expanders |
| GB1367002A (en) * | 1971-04-06 | 1974-09-18 | Victor Company Of Japan | Compression and/or expansion system and circuit |
| GB1432763A (en) * | 1972-05-02 | 1976-04-22 | Dolby Laboratories Inc | Compressors expanders and noise reduction systems |
| US3875537A (en) * | 1972-05-02 | 1975-04-01 | Dolby Laboratories Inc | Circuits for modifying the dynamic range of an input signal |
| US3934190A (en) * | 1972-09-15 | 1976-01-20 | Dolby Laboratories, Inc. | Signal compressors and expanders |
| US3909733A (en) * | 1973-05-17 | 1975-09-30 | Dolby Laboratories Inc | Dynamic range modifying circuits utilizing variable negative resistance |
| US3971405A (en) * | 1974-07-15 | 1976-07-27 | Parker-Hannifin Corporation | Pressure controlled hydrant valve coupler |
| US3930208A (en) * | 1974-08-29 | 1975-12-30 | Northern Electric Co | A-C signal processing circuits for compandors |
| US3902131A (en) * | 1974-09-06 | 1975-08-26 | Quadracast Systems | Tandem audio dynamic range expander |
| JPS51127608A (en) * | 1975-04-30 | 1976-11-06 | Victor Co Of Japan Ltd | Signal transmitting unit |
| US4061874A (en) * | 1976-06-03 | 1977-12-06 | Fricke J P | System for reproducing sound information |
| DE2803751C2 (de) * | 1978-01-28 | 1982-06-09 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Schaltung zur automatischen Dynamik- Kompression oder -Expansion |
| JPS5552971A (en) * | 1978-10-16 | 1980-04-17 | Mitsubishi Electric Corp | Simulator for radar indicator |
-
1981
- 1981-06-26 DK DK282981A patent/DK168806B1/da not_active IP Right Cessation
- 1981-06-26 DK DK282881A patent/DK172325B1/da not_active IP Right Cessation
- 1981-06-26 DK DK282581A patent/DK156356C/da not_active IP Right Cessation
- 1981-06-29 GB GB8119974A patent/GB2079114B/en not_active Expired
- 1981-06-29 NL NL8103123A patent/NL192652C/nl not_active IP Right Cessation
- 1981-06-29 ES ES503496A patent/ES503496A0/es active Granted
- 1981-06-29 SE SE8104063A patent/SE447525B/sv not_active IP Right Cessation
- 1981-06-29 FI FI812025A patent/FI79428C/sv not_active IP Right Cessation
- 1981-06-29 NO NO812217A patent/NO157399C/no not_active IP Right Cessation
- 1981-06-29 GB GB8119973A patent/GB2079113B/en not_active Expired
- 1981-06-29 NO NO812218A patent/NO157400C/no not_active IP Right Cessation
- 1981-06-29 GB GB8119972A patent/GB2079112B/en not_active Expired
- 1981-06-29 ES ES503493A patent/ES8300233A1/es not_active Expired
- 1981-06-29 FI FI812024A patent/FI74368C/sv not_active IP Right Cessation
- 1981-06-29 NL NLAANVRAGE8103124,A patent/NL189988C/xx not_active IP Right Cessation
- 1981-06-29 FI FI812026A patent/FI76456C/sv not_active IP Right Cessation
- 1981-06-29 NO NO812216A patent/NO157398C/no not_active IP Right Cessation
- 1981-06-29 SE SE8104062A patent/SE450985B/sv not_active IP Right Cessation
- 1981-06-29 SE SE8104061A patent/SE447524B/sv not_active IP Right Cessation
- 1981-06-29 ES ES503497A patent/ES503497A0/es active Granted
- 1981-06-29 NL NLAANVRAGE8103122,A patent/NL190214C/xx not_active IP Right Cessation
- 1981-06-30 IT IT22650/81A patent/IT1137985B/it active
- 1981-06-30 KR KR1019810002350A patent/KR880000105B1/ko not_active Expired
- 1981-06-30 KR KR1019810002351A patent/KR880000106B1/ko not_active Expired
- 1981-06-30 CH CH4294/81A patent/CH660653A5/de not_active IP Right Cessation
- 1981-06-30 AU AU72365/81A patent/AU546641B2/en not_active Expired
- 1981-06-30 IT IT22652/81A patent/IT1137987B/it active
- 1981-06-30 AU AU72393/81A patent/AU544888B2/en not_active Expired
- 1981-06-30 AT AT0291581A patent/AT372796B/de not_active IP Right Cessation
- 1981-06-30 IT IT22651/81A patent/IT1137986B/it active
- 1981-06-30 DE DE3125789A patent/DE3125789C2/de not_active Expired
- 1981-06-30 KR KR1019810002352A patent/KR840002491B1/ko not_active Expired
- 1981-06-30 CH CH4293/81A patent/CH654703A5/de not_active IP Right Cessation
- 1981-06-30 AT AT0291481A patent/AT386304B/de not_active IP Right Cessation
- 1981-06-30 DE DE19813125788 patent/DE3125788A1/de active Granted
- 1981-06-30 AU AU72394/81A patent/AU545125B2/en not_active Expired
- 1981-06-30 AT AT0291681A patent/AT386911B/de not_active IP Right Cessation
- 1981-06-30 BR BR8104158A patent/BR8104158A/pt not_active IP Right Cessation
- 1981-06-30 CH CH4292/81A patent/CH662684A5/de not_active IP Right Cessation
- 1981-06-30 BR BR8104157A patent/BR8104157A/pt not_active IP Right Cessation
- 1981-06-30 DE DE19813125790 patent/DE3125790A1/de active Granted
- 1981-06-30 BR BR8104156A patent/BR8104156A/pt not_active IP Right Cessation
-
1984
- 1984-09-19 KR KR1019840005735A patent/KR840002492B1/ko not_active Expired
-
1985
- 1985-01-16 SG SG43/85A patent/SG4385G/en unknown
- 1985-01-16 SG SG42/85A patent/SG4285G/en unknown
- 1985-01-16 SG SG45/85A patent/SG4585G/en unknown
- 1985-04-04 HK HK282/85A patent/HK28285A/xx not_active IP Right Cessation
- 1985-04-04 HK HK283/85A patent/HK28385A/xx not_active IP Right Cessation
- 1985-04-04 HK HK284/85A patent/HK28485A/xx not_active IP Right Cessation
- 1985-12-30 MY MY1147/85A patent/MY8501147A/xx unknown
- 1985-12-30 MY MY1149/85A patent/MY8501149A/xx unknown
- 1985-12-30 MY MY1148/85A patent/MY8501148A/xx unknown
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MA | Patent expired |
Owner name: DOLBY, RAY MILTON |