BR8104156A - Disposicao de circuito para modificacao de faixa dinamica e disposicao de reducao de ruido - Google Patents
Disposicao de circuito para modificacao de faixa dinamica e disposicao de reducao de ruidoInfo
- Publication number
- BR8104156A BR8104156A BR8104156A BR8104156A BR8104156A BR 8104156 A BR8104156 A BR 8104156A BR 8104156 A BR8104156 A BR 8104156A BR 8104156 A BR8104156 A BR 8104156A BR 8104156 A BR8104156 A BR 8104156A
- Authority
- BR
- Brazil
- Prior art keywords
- arrangement
- noise reduction
- dynamic band
- band modification
- circuit arrangement
- Prior art date
Links
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
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16395080A | 1980-06-30 | 1980-06-30 | |
US18077180A | 1980-08-22 | 1980-08-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
BR8104156A true BR8104156A (pt) | 1982-03-16 |
Family
ID=26860115
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR8104157A BR8104157A (pt) | 1980-06-30 | 1981-06-30 | Disposicoes de circuitos para reducao dos efeitos de sobrecarga media em sistemas de gravacao e de transmissao de sinais |
BR8104158A BR8104158A (pt) | 1980-06-30 | 1981-06-30 | Circuitos para supressao de efeitos de modulacao de frequencia media em compressores,expansores e sistemas de reducao de ruido |
BR8104156A BR8104156A (pt) | 1980-06-30 | 1981-06-30 | Disposicao de circuito para modificacao de faixa dinamica e disposicao de reducao de ruido |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR8104157A BR8104157A (pt) | 1980-06-30 | 1981-06-30 | Disposicoes de circuitos para reducao dos efeitos de sobrecarga media em sistemas de gravacao e de transmissao de sinais |
BR8104158A BR8104158A (pt) | 1980-06-30 | 1981-06-30 | Circuitos para supressao de efeitos de modulacao de frequencia media em compressores,expansores e sistemas de reducao de ruido |
Country Status (17)
Country | Link |
---|---|
KR (4) | KR880000105B1 (de) |
AT (3) | AT386911B (de) |
AU (3) | AU546641B2 (de) |
BR (3) | BR8104157A (de) |
CH (3) | CH654703A5 (de) |
DE (3) | DE3125790A1 (de) |
DK (3) | DK168806B1 (de) |
ES (3) | ES503493A0 (de) |
FI (3) | FI76456C (de) |
GB (3) | GB2079114B (de) |
HK (3) | HK28385A (de) |
IT (3) | IT1137985B (de) |
MY (3) | MY8501147A (de) |
NL (3) | NL189988C (de) |
NO (3) | NO157398C (de) |
SE (3) | SE447524B (de) |
SG (3) | SG4585G (de) |
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 |
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 |
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 |
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 (de) * | 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 |
FI57502C (fi) * | 1971-04-06 | 1980-08-11 | Victor Company Of Japan | Kompressions- och expansionssystem |
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 NO NO812216A patent/NO157398C/no not_active IP Right Cessation
- 1981-06-29 FI FI812026A patent/FI76456C/fi not_active IP Right Cessation
- 1981-06-29 NL NLAANVRAGE8103124,A patent/NL189988C/xx not_active IP Right Cessation
- 1981-06-29 SE SE8104061A patent/SE447524B/sv not_active IP Right Cessation
- 1981-06-29 SE SE8104063A patent/SE447525B/sv not_active IP Right Cessation
- 1981-06-29 ES ES503493A patent/ES503493A0/es active Granted
- 1981-06-29 ES ES503497A patent/ES503497A0/es active Granted
- 1981-06-29 SE SE8104062A patent/SE450985B/sv not_active IP Right Cessation
- 1981-06-29 GB GB8119974A patent/GB2079114B/en not_active Expired
- 1981-06-29 NL NLAANVRAGE8103122,A patent/NL190214C/xx not_active IP Right Cessation
- 1981-06-29 GB GB8119972A patent/GB2079112B/en not_active Expired
- 1981-06-29 GB GB8119973A patent/GB2079113B/en not_active Expired
- 1981-06-29 NO NO812217A patent/NO157399C/no not_active IP Right Cessation
- 1981-06-29 NO NO812218A patent/NO157400C/no not_active IP Right Cessation
- 1981-06-29 ES ES503496A patent/ES8204255A1/es not_active Expired
- 1981-06-29 FI FI812024A patent/FI74368C/fi not_active IP Right Cessation
- 1981-06-29 FI FI812025A patent/FI79428C/fi not_active IP Right Cessation
- 1981-06-29 NL NL8103123A patent/NL192652C/nl 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 KR KR1019810002350A patent/KR880000105B1/ko active
- 1981-06-30 BR BR8104158A patent/BR8104158A/pt not_active IP Right Cessation
- 1981-06-30 AU AU72365/81A patent/AU546641B2/en not_active Expired
- 1981-06-30 AT AT0291681A patent/AT386911B/de not_active IP Right Cessation
- 1981-06-30 AT AT0291581A patent/AT372796B/de not_active IP Right Cessation
- 1981-06-30 AU AU72394/81A patent/AU545125B2/en not_active Expired
- 1981-06-30 IT IT22650/81A patent/IT1137985B/it active
- 1981-06-30 DE DE19813125788 patent/DE3125788A1/de active Granted
- 1981-06-30 CH CH4293/81A patent/CH654703A5/de not_active IP Right Cessation
- 1981-06-30 KR KR1019810002351A patent/KR880000106B1/ko active
- 1981-06-30 BR BR8104156A patent/BR8104156A/pt 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 AT AT0291481A patent/AT386304B/de not_active IP Right Cessation
- 1981-06-30 KR KR1019810002352A patent/KR840002491B1/ko active
- 1981-06-30 CH CH4292/81A patent/CH662684A5/de not_active IP Right Cessation
- 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 CH CH4294/81A patent/CH660653A5/de not_active IP Right Cessation
-
1984
- 1984-09-19 KR KR1019840005735A patent/KR840002492B1/ko not_active IP Right Cessation
-
1985
- 1985-01-16 SG SG45/85A patent/SG4585G/en unknown
- 1985-01-16 SG SG42/85A patent/SG4285G/en unknown
- 1985-01-16 SG SG43/85A patent/SG4385G/en unknown
- 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
- 1985-04-04 HK HK282/85A patent/HK28285A/xx not_active IP Right Cessation
- 1985-12-30 MY MY1147/85A patent/MY8501147A/xx unknown
- 1985-12-30 MY MY1148/85A patent/MY8501148A/xx unknown
- 1985-12-30 MY MY1149/85A patent/MY8501149A/xx unknown
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK | Patent expired |
Effective date: 19960630 |