AU544888B2 - Compander - Google Patents

Compander

Info

Publication number
AU544888B2
AU544888B2 AU72393/81A AU7239381A AU544888B2 AU 544888 B2 AU544888 B2 AU 544888B2 AU 72393/81 A AU72393/81 A AU 72393/81A AU 7239381 A AU7239381 A AU 7239381A AU 544888 B2 AU544888 B2 AU 544888B2
Authority
AU
Australia
Prior art keywords
compander
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
AU72393/81A
Other versions
AU7239381A (en
Inventor
Ray Milton Dolby
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 AU7239381A publication Critical patent/AU7239381A/en
Application granted granted Critical
Publication of AU544888B2 publication Critical patent/AU544888B2/en
Anticipated expiration legal-status Critical
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
AU72393/81A 1980-06-30 1981-06-30 Compander Expired AU544888B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US16395080A 1980-06-30 1980-06-30
US163950 1980-06-30
US18077180A 1980-08-22 1980-08-22
US180771 1980-08-22

Publications (2)

Publication Number Publication Date
AU7239381A AU7239381A (en) 1982-01-07
AU544888B2 true AU544888B2 (en) 1985-06-20

Family

ID=26860115

Family Applications (3)

Application Number Title Priority Date Filing Date
AU72365/81A Expired AU546641B2 (en) 1980-06-30 1981-06-30 Compander
AU72393/81A Expired AU544888B2 (en) 1980-06-30 1981-06-30 Compander
AU72394/81A Expired AU545125B2 (en) 1980-06-30 1981-06-30 Compander

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AU72365/81A Expired AU546641B2 (en) 1980-06-30 1981-06-30 Compander

Family Applications After (1)

Application Number Title Priority Date Filing Date
AU72394/81A Expired AU545125B2 (en) 1980-06-30 1981-06-30 Compander

Country Status (17)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU590766B2 (en) * 1985-06-17 1989-11-16 Dolby Laboratories Licensing Corporation Circuit arrangements for modifying dynamic range using action substitution and superposition techniques

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (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)

* 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 (en) * 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 (en) * 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 (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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU590766B2 (en) * 1985-06-17 1989-11-16 Dolby Laboratories Licensing Corporation Circuit arrangements for modifying dynamic range using action substitution and superposition techniques

Also Published As

Publication number Publication date
IT1137986B (en) 1986-09-10
CH662684A5 (en) 1987-10-15
DE3125790C2 (en) 1992-11-12
SE8104062L (en) 1981-12-31
NL8103124A (en) 1982-01-18
KR830006992A (en) 1983-10-12
KR840002492B1 (en) 1984-12-31
ATA291481A (en) 1987-12-15
NL189988B (en) 1993-04-16
CH654703A5 (en) 1986-02-28
SG4285G (en) 1985-06-14
MY8501149A (en) 1985-12-31
ES503493A0 (en) 1982-10-01
NL190214C (en) 1993-12-01
NO157400C (en) 1988-03-09
NL192652B (en) 1997-07-01
NO157400B (en) 1987-11-30
FI74368B (en) 1987-09-30
SE447524B (en) 1986-11-17
HK28385A (en) 1985-04-12
NO812216L (en) 1982-01-04
AU545125B2 (en) 1985-07-04
BR8104156A (en) 1982-03-16
FI74368C (en) 1988-01-11
FI812025L (en) 1981-12-31
FI812024L (en) 1981-12-31
DK282981A (en) 1981-12-31
NO157398C (en) 1988-03-09
DE3125790A1 (en) 1982-05-13
AT386911B (en) 1988-11-10
SE447525B (en) 1986-11-17
AT386304B (en) 1988-08-10
AT372796B (en) 1983-11-10
ES503497A0 (en) 1982-11-01
KR840002491B1 (en) 1984-12-31
BR8104158A (en) 1982-03-16
NO157399B (en) 1987-11-30
AU7236581A (en) 1982-01-07
KR830006993A (en) 1983-10-12
DK168806B1 (en) 1994-06-13
AU7239381A (en) 1982-01-07
DK156356B (en) 1989-08-07
IT8122651A0 (en) 1981-06-30
NL189988C (en) 1993-09-16
DK172325B1 (en) 1998-03-16
DE3125789C2 (en) 1984-01-12
ES8204255A1 (en) 1982-04-16
NO812218L (en) 1982-01-04
FI76456C (en) 1988-10-10
KR880000105B1 (en) 1988-02-23
DE3125788C2 (en) 1992-06-11
DK282581A (en) 1981-12-31
GB2079113B (en) 1984-10-03
GB2079114B (en) 1984-10-03
KR880000106B1 (en) 1988-02-23
NL190214B (en) 1993-07-01
GB2079114A (en) 1982-01-13
MY8501147A (en) 1985-12-31
GB2079113A (en) 1982-01-13
ATA291581A (en) 1983-03-15
IT1137985B (en) 1986-09-10
SE450985B (en) 1987-09-07
NL8103122A (en) 1982-01-18
SG4585G (en) 1985-06-14
ES8301084A1 (en) 1982-11-01
IT8122650A0 (en) 1981-06-30
DE3125789A1 (en) 1982-05-19
HK28485A (en) 1985-04-12
FI812026L (en) 1981-12-31
ES503496A0 (en) 1982-04-16
GB2079112B (en) 1984-10-03
CH660653A5 (en) 1987-05-15
IT8122652A0 (en) 1981-06-30
HK28285A (en) 1985-04-12
DE3125788A1 (en) 1982-05-13
NO157398B (en) 1987-11-30
ATA291681A (en) 1988-03-15
FI76456B (en) 1988-06-30
FI79428B (en) 1989-08-31
FI79428C (en) 1989-12-11
NL192652C (en) 1997-11-04
DK282881A (en) 1981-12-31
SG4385G (en) 1985-06-14
ES8300233A1 (en) 1982-10-01
AU546641B2 (en) 1985-09-12
AU7239481A (en) 1982-01-07
NO157399C (en) 1988-03-09
NL8103123A (en) 1982-01-18
MY8501148A (en) 1985-12-31
DK156356C (en) 1989-12-27
IT1137987B (en) 1986-09-10
GB2079112A (en) 1982-01-13
SE8104061L (en) 1981-12-31
BR8104157A (en) 1982-03-16
SE8104063L (en) 1981-12-31
NO812217L (en) 1982-01-04

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Legal Events

Date Code Title Description
MK14 Patent ceased section 143(a) (annual fees not paid) or expired