NL189988C - COMPANDOR NOISE REDUCTION SYSTEM AND COMPRESSOR AND EXPANDER FOR SUCH A SYSTEM. - Google Patents
COMPANDOR NOISE REDUCTION SYSTEM AND COMPRESSOR AND EXPANDER FOR SUCH A SYSTEM.Info
- Publication number
- NL189988C NL189988C NLAANVRAGE8103124,A NL8103124A NL189988C NL 189988 C NL189988 C NL 189988C NL 8103124 A NL8103124 A NL 8103124A NL 189988 C NL189988 C NL 189988C
- Authority
- NL
- Netherlands
- Prior art keywords
- compandor
- expander
- compressor
- noise reduction
- reduction system
- 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 (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 |
---|---|
NL8103124A NL8103124A (en) | 1982-01-18 |
NL189988B NL189988B (en) | 1993-04-16 |
NL189988C true NL189988C (en) | 1993-09-16 |
Family
ID=26860115
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL8103123A NL192652C (en) | 1980-06-30 | 1981-06-29 | Circuit member for reducing medium overload effects in signal recording and signal transmission systems. |
NLAANVRAGE8103124,A NL189988C (en) | 1980-06-30 | 1981-06-29 | COMPANDOR NOISE REDUCTION SYSTEM AND COMPRESSOR AND EXPANDER FOR SUCH A SYSTEM. |
NLAANVRAGE8103122,A NL190214C (en) | 1980-06-30 | 1981-06-29 | CHAIN DEVICE FOR CHANGING THE DYNAMIC AREA OF AN INPUT SIGNAL. |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL8103123A NL192652C (en) | 1980-06-30 | 1981-06-29 | Circuit member for reducing medium overload effects in signal recording and signal transmission systems. |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NLAANVRAGE8103122,A NL190214C (en) | 1980-06-30 | 1981-06-29 | CHAIN DEVICE FOR CHANGING THE DYNAMIC AREA OF AN INPUT SIGNAL. |
Country Status (17)
Country | Link |
---|---|
KR (4) | KR840002491B1 (en) |
AT (3) | AT386911B (en) |
AU (3) | AU544888B2 (en) |
BR (3) | BR8104156A (en) |
CH (3) | CH654703A5 (en) |
DE (3) | DE3125790A1 (en) |
DK (3) | DK172325B1 (en) |
ES (3) | ES503496A0 (en) |
FI (3) | FI79428C (en) |
GB (3) | GB2079113B (en) |
HK (3) | HK28485A (en) |
IT (3) | IT1137985B (en) |
MY (3) | MY8501149A (en) |
NL (3) | NL192652C (en) |
NO (3) | NO157399C (en) |
SE (3) | SE450985B (en) |
SG (3) | SG4285G (en) |
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 (en) * | 2000-03-08 | 2004-02-05 | Sennheiser Electronic Gmbh & Co. Kg | Compander system with a compressor circuit and an expander circuit |
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 |
US3903485A (en) * | 1968-01-10 | 1975-09-02 | Ray Milton Dolby | Compressors, expanders and noise reduction systems |
GB1253031A (en) * | 1968-01-10 | 1971-11-10 | ||
US3846719A (en) * | 1973-09-13 | 1974-11-05 | Dolby Laboratories Inc | 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 |
US3795876A (en) * | 1971-04-06 | 1974-03-05 | 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 |
CA1000617A (en) * | 1973-05-17 | 1976-11-30 | Ray M. Dolby | Compressors, expanders and noise reduction systems |
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 (en) * | 1978-01-28 | 1982-06-09 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Circuit for automatic dynamic compression or expansion |
JPS5552971A (en) * | 1978-10-16 | 1980-04-17 | Mitsubishi Electric Corp | Simulator for radar indicator |
-
1981
- 1981-06-26 DK DK282881A patent/DK172325B1/en not_active IP Right Cessation
- 1981-06-26 DK DK282581A patent/DK156356C/en not_active IP Right Cessation
- 1981-06-26 DK DK282981A patent/DK168806B1/en not_active IP Right Cessation
- 1981-06-29 GB GB8119973A patent/GB2079113B/en not_active Expired
- 1981-06-29 SE SE8104062A patent/SE450985B/en not_active IP Right Cessation
- 1981-06-29 ES ES503496A patent/ES503496A0/en active Granted
- 1981-06-29 NO NO812217A patent/NO157399C/en not_active IP Right Cessation
- 1981-06-29 FI FI812025A patent/FI79428C/en not_active IP Right Cessation
- 1981-06-29 GB GB8119972A patent/GB2079112B/en not_active Expired
- 1981-06-29 FI FI812026A patent/FI76456C/en not_active IP Right Cessation
- 1981-06-29 NL NL8103123A patent/NL192652C/en not_active IP Right Cessation
- 1981-06-29 GB GB8119974A patent/GB2079114B/en not_active Expired
- 1981-06-29 NO NO812216A patent/NO157398C/en not_active IP Right Cessation
- 1981-06-29 NL NLAANVRAGE8103124,A patent/NL189988C/en not_active IP Right Cessation
- 1981-06-29 FI FI812024A patent/FI74368C/en not_active IP Right Cessation
- 1981-06-29 SE SE8104063A patent/SE447525B/en not_active IP Right Cessation
- 1981-06-29 ES ES503493A patent/ES8300233A1/en not_active Expired
- 1981-06-29 SE SE8104061A patent/SE447524B/en not_active IP Right Cessation
- 1981-06-29 ES ES503497A patent/ES8301084A1/en not_active Expired
- 1981-06-29 NL NLAANVRAGE8103122,A patent/NL190214C/en not_active IP Right Cessation
- 1981-06-29 NO NO812218A patent/NO157400C/en not_active IP Right Cessation
- 1981-06-30 BR BR8104156A patent/BR8104156A/en not_active IP Right Cessation
- 1981-06-30 CH CH4293/81A patent/CH654703A5/en not_active IP Right Cessation
- 1981-06-30 DE DE19813125790 patent/DE3125790A1/en active Granted
- 1981-06-30 DE DE19813125788 patent/DE3125788A1/en active Granted
- 1981-06-30 IT IT22650/81A patent/IT1137985B/en active
- 1981-06-30 IT IT22652/81A patent/IT1137987B/en active
- 1981-06-30 CH CH4292/81A patent/CH662684A5/en not_active IP Right Cessation
- 1981-06-30 AU AU72393/81A patent/AU544888B2/en not_active Expired
- 1981-06-30 BR BR8104158A patent/BR8104158A/en not_active IP Right Cessation
- 1981-06-30 AT AT0291681A patent/AT386911B/en not_active IP Right Cessation
- 1981-06-30 AU AU72394/81A patent/AU545125B2/en not_active Expired
- 1981-06-30 KR KR1019810002352A patent/KR840002491B1/en active
- 1981-06-30 KR KR1019810002350A patent/KR880000105B1/en active
- 1981-06-30 DE DE3125789A patent/DE3125789C2/en not_active Expired
- 1981-06-30 AU AU72365/81A patent/AU546641B2/en not_active Expired
- 1981-06-30 AT AT0291481A patent/AT386304B/en not_active IP Right Cessation
- 1981-06-30 CH CH4294/81A patent/CH660653A5/en not_active IP Right Cessation
- 1981-06-30 AT AT0291581A patent/AT372796B/en not_active IP Right Cessation
- 1981-06-30 BR BR8104157A patent/BR8104157A/en not_active IP Right Cessation
- 1981-06-30 KR KR1019810002351A patent/KR880000106B1/en active
- 1981-06-30 IT IT22651/81A patent/IT1137986B/en active
-
1984
- 1984-09-19 KR KR1019840005735A patent/KR840002492B1/en not_active IP Right Cessation
-
1985
- 1985-01-16 SG SG42/85A patent/SG4285G/en unknown
- 1985-01-16 SG SG43/85A patent/SG4385G/en unknown
- 1985-01-16 SG SG45/85A patent/SG4585G/en unknown
- 1985-04-04 HK HK284/85A patent/HK28485A/en not_active IP Right Cessation
- 1985-04-04 HK HK283/85A patent/HK28385A/en not_active IP Right Cessation
- 1985-04-04 HK HK282/85A patent/HK28285A/en not_active IP Right Cessation
- 1985-12-30 MY MY1149/85A patent/MY8501149A/en unknown
- 1985-12-30 MY MY1147/85A patent/MY8501147A/en unknown
- 1985-12-30 MY MY1148/85A patent/MY8501148A/en unknown
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A85 | Still pending on 85-01-01 | ||
BA | A request for search or an international-type search has been filed | ||
BB | A search report has been drawn up | ||
BC | A request for examination has been filed | ||
V4 | Discontinued because of reaching the maximum lifetime of a patent |
Free format text: 20010629 |