GB2079113B - Networks for suppressing mid-frequency modulation effects in compressors expanders and noise reduction systems - Google Patents

Networks for suppressing mid-frequency modulation effects in compressors expanders and noise reduction systems

Info

Publication number
GB2079113B
GB2079113B GB8119973A GB8119973A GB2079113B GB 2079113 B GB2079113 B GB 2079113B GB 8119973 A GB8119973 A GB 8119973A GB 8119973 A GB8119973 A GB 8119973A GB 2079113 B GB2079113 B GB 2079113B
Authority
GB
United Kingdom
Prior art keywords
expanders
compressors
networks
noise reduction
frequency modulation
Prior art date
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
GB8119973A
Other languages
English (en)
Other versions
GB2079113A (en
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.)
Individual
Original Assignee
Individual
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.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB2079113A publication Critical patent/GB2079113A/en
Application granted granted Critical
Publication of GB2079113B publication Critical patent/GB2079113B/en
Expired legal-status Critical Current

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
GB8119973A 1980-06-30 1981-06-29 Networks for suppressing mid-frequency modulation effects in compressors expanders and noise reduction systems Expired GB2079113B (en)

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 (2)

Publication Number Publication Date
GB2079113A GB2079113A (en) 1982-01-13
GB2079113B true GB2079113B (en) 1984-10-03

Family

ID=26860115

Family Applications (3)

Application Number Title Priority Date Filing Date
GB8119972A Expired GB2079112B (en) 1980-06-30 1981-06-29 Circuit arrangement for modifying dynamic range
GB8119974A Expired GB2079114B (en) 1980-06-30 1981-06-29 Circuit arrangements for reducing media overload effects in signal recording and transmission systems
GB8119973A Expired GB2079113B (en) 1980-06-30 1981-06-29 Networks for suppressing mid-frequency modulation effects in compressors expanders and noise reduction systems

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB8119972A Expired GB2079112B (en) 1980-06-30 1981-06-29 Circuit arrangement for modifying dynamic range
GB8119974A Expired GB2079114B (en) 1980-06-30 1981-06-29 Circuit arrangements for reducing media overload effects in signal recording and transmission systems

Country Status (17)

Country Link
KR (4) KR880000105B1 (de)
AT (3) AT372796B (de)
AU (3) AU546641B2 (de)
BR (3) BR8104158A (de)
CH (3) CH662684A5 (de)
DE (3) DE3125788A1 (de)
DK (3) DK156356C (de)
ES (3) ES8301084A1 (de)
FI (3) FI74368C (de)
GB (3) GB2079112B (de)
HK (3) HK28385A (de)
IT (3) IT1137985B (de)
MY (3) MY8501149A (de)
NL (3) NL189988C (de)
NO (3) NO157400C (de)
SE (3) SE447525B (de)
SG (3) SG4285G (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
GB1253031A (de) * 1968-01-10 1971-11-10
US3846719A (en) * 1973-09-13 1974-11-05 Dolby Laboratories Inc Noise reduction systems
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

Also Published As

Publication number Publication date
IT1137986B (it) 1986-09-10
CH662684A5 (de) 1987-10-15
DE3125790C2 (de) 1992-11-12
SE8104062L (sv) 1981-12-31
NL8103124A (nl) 1982-01-18
KR830006992A (ko) 1983-10-12
KR840002492B1 (ko) 1984-12-31
ATA291481A (de) 1987-12-15
NL189988B (nl) 1993-04-16
CH654703A5 (de) 1986-02-28
SG4285G (en) 1985-06-14
MY8501149A (en) 1985-12-31
ES503493A0 (es) 1982-10-01
NL190214C (nl) 1993-12-01
NO157400C (no) 1988-03-09
NL192652B (nl) 1997-07-01
NO157400B (no) 1987-11-30
FI74368B (fi) 1987-09-30
SE447524B (sv) 1986-11-17
HK28385A (en) 1985-04-12
NO812216L (no) 1982-01-04
AU545125B2 (en) 1985-07-04
BR8104156A (pt) 1982-03-16
FI74368C (fi) 1988-01-11
FI812025L (fi) 1981-12-31
FI812024L (fi) 1981-12-31
DK282981A (da) 1981-12-31
NO157398C (no) 1988-03-09
DE3125790A1 (de) 1982-05-13
AT386911B (de) 1988-11-10
SE447525B (sv) 1986-11-17
AT386304B (de) 1988-08-10
AT372796B (de) 1983-11-10
ES503497A0 (es) 1982-11-01
KR840002491B1 (ko) 1984-12-31
BR8104158A (pt) 1982-03-16
NO157399B (no) 1987-11-30
AU7236581A (en) 1982-01-07
KR830006993A (ko) 1983-10-12
AU544888B2 (en) 1985-06-20
DK168806B1 (da) 1994-06-13
AU7239381A (en) 1982-01-07
DK156356B (da) 1989-08-07
IT8122651A0 (it) 1981-06-30
NL189988C (nl) 1993-09-16
DK172325B1 (da) 1998-03-16
DE3125789C2 (de) 1984-01-12
ES8204255A1 (es) 1982-04-16
NO812218L (no) 1982-01-04
FI76456C (fi) 1988-10-10
KR880000105B1 (ko) 1988-02-23
DE3125788C2 (de) 1992-06-11
DK282581A (da) 1981-12-31
GB2079114B (en) 1984-10-03
KR880000106B1 (ko) 1988-02-23
NL190214B (nl) 1993-07-01
GB2079114A (en) 1982-01-13
MY8501147A (en) 1985-12-31
GB2079113A (en) 1982-01-13
ATA291581A (de) 1983-03-15
IT1137985B (it) 1986-09-10
SE450985B (sv) 1987-09-07
NL8103122A (nl) 1982-01-18
SG4585G (en) 1985-06-14
ES8301084A1 (es) 1982-11-01
IT8122650A0 (it) 1981-06-30
DE3125789A1 (de) 1982-05-19
HK28485A (en) 1985-04-12
FI812026L (fi) 1981-12-31
ES503496A0 (es) 1982-04-16
GB2079112B (en) 1984-10-03
CH660653A5 (de) 1987-05-15
IT8122652A0 (it) 1981-06-30
HK28285A (en) 1985-04-12
DE3125788A1 (de) 1982-05-13
NO157398B (no) 1987-11-30
ATA291681A (de) 1988-03-15
FI76456B (fi) 1988-06-30
FI79428B (fi) 1989-08-31
FI79428C (fi) 1989-12-11
NL192652C (nl) 1997-11-04
DK282881A (da) 1981-12-31
SG4385G (en) 1985-06-14
ES8300233A1 (es) 1982-10-01
AU546641B2 (en) 1985-09-12
AU7239481A (en) 1982-01-07
NO157399C (no) 1988-03-09
NL8103123A (nl) 1982-01-18
MY8501148A (en) 1985-12-31
DK156356C (da) 1989-12-27
IT1137987B (it) 1986-09-10
GB2079112A (en) 1982-01-13
SE8104061L (sv) 1981-12-31
BR8104157A (pt) 1982-03-16
SE8104063L (sv) 1981-12-31
NO812217L (no) 1982-01-04

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20010628