DK172325B1 - Signalkompressor og signalekspander til brug i et transmissionssystem - Google Patents

Signalkompressor og signalekspander til brug i et transmissionssystem Download PDF

Info

Publication number
DK172325B1
DK172325B1 DK282881A DK282881A DK172325B1 DK 172325 B1 DK172325 B1 DK 172325B1 DK 282881 A DK282881 A DK 282881A DK 282881 A DK282881 A DK 282881A DK 172325 B1 DK172325 B1 DK 172325B1
Authority
DK
Denmark
Prior art keywords
frequency
signal
compressor
expander
filter
Prior art date
Application number
DK282881A
Other languages
Danish (da)
English (en)
Other versions
DK282881A (da
Inventor
Ray Milton Dolby
Original Assignee
Ray Milton Dolby
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 Ray Milton Dolby filed Critical Ray Milton Dolby
Publication of DK282881A publication Critical patent/DK282881A/da
Application granted granted Critical
Publication of DK172325B1 publication Critical patent/DK172325B1/da

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

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)
DK282881A 1980-06-30 1981-06-26 Signalkompressor og signalekspander til brug i et transmissionssystem DK172325B1 (da)

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 (2)

Publication Number Publication Date
DK282881A DK282881A (da) 1981-12-31
DK172325B1 true DK172325B1 (da) 1998-03-16

Family

ID=26860115

Family Applications (3)

Application Number Title Priority Date Filing Date
DK282981A DK168806B1 (da) 1980-06-30 1981-06-26 Kredsløbsarrangement til modifikation af dynamikområde
DK282581A DK156356C (da) 1980-06-30 1981-06-26 Kredsloeb til reduktion af overbelastningseffekter i signalindspilnings-og transmissionssystemer
DK282881A DK172325B1 (da) 1980-06-30 1981-06-26 Signalkompressor og signalekspander til brug i et transmissionssystem

Family Applications Before (2)

Application Number Title Priority Date Filing Date
DK282981A DK168806B1 (da) 1980-06-30 1981-06-26 Kredsløbsarrangement til modifikation af dynamikområde
DK282581A DK156356C (da) 1980-06-30 1981-06-26 Kredsloeb til reduktion af overbelastningseffekter i signalindspilnings-og transmissionssystemer

Country Status (17)

Country Link
KR (4) KR880000105B1 (it)
AT (3) AT372796B (it)
AU (3) AU544888B2 (it)
BR (3) BR8104156A (it)
CH (3) CH662684A5 (it)
DE (3) DE3125790A1 (it)
DK (3) DK168806B1 (it)
ES (3) ES503497A0 (it)
FI (3) FI79428C (it)
GB (3) GB2079113B (it)
HK (3) HK28285A (it)
IT (3) IT1137987B (it)
MY (3) MY8501147A (it)
NL (3) NL190214C (it)
NO (3) NO157398C (it)
SE (3) SE447524B (it)
SG (3) SG4585G (it)

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
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)

* 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
US3903485A (en) * 1968-01-10 1975-09-02 Ray Milton Dolby Compressors, expanders and noise reduction systems
GB1253031A (it) * 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
FI57502C (fi) * 1971-04-06 1980-08-11 Victor Company Of Japan Kompressions- och expansionssystem
US3875537A (en) * 1972-05-02 1975-04-01 Dolby Laboratories Inc Circuits for modifying the dynamic range of an input signal
GB1432763A (en) * 1972-05-02 1976-04-22 Dolby Laboratories Inc Compressors expanders and noise reduction systems
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 (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
NL190214C (nl) 1993-12-01
AU7239381A (en) 1982-01-07
AT372796B (de) 1983-11-10
ES503493A0 (es) 1982-10-01
IT8122651A0 (it) 1981-06-30
KR830006992A (ko) 1983-10-12
GB2079114B (en) 1984-10-03
NL189988B (nl) 1993-04-16
DK156356C (da) 1989-12-27
SE450985B (sv) 1987-09-07
NO157400B (no) 1987-11-30
AT386911B (de) 1988-11-10
IT1137986B (it) 1986-09-10
FI79428C (fi) 1989-12-11
DK156356B (da) 1989-08-07
IT1137985B (it) 1986-09-10
ES8301084A1 (es) 1982-11-01
AU544888B2 (en) 1985-06-20
FI79428B (fi) 1989-08-31
CH660653A5 (de) 1987-05-15
DE3125788C2 (it) 1992-06-11
AU546641B2 (en) 1985-09-12
NO157398B (no) 1987-11-30
NO157399B (no) 1987-11-30
NL189988C (nl) 1993-09-16
BR8104156A (pt) 1982-03-16
MY8501149A (en) 1985-12-31
DK168806B1 (da) 1994-06-13
BR8104157A (pt) 1982-03-16
FI812026L (fi) 1981-12-31
GB2079113B (en) 1984-10-03
GB2079112B (en) 1984-10-03
FI812024L (fi) 1981-12-31
HK28385A (en) 1985-04-12
GB2079113A (en) 1982-01-13
ES503496A0 (es) 1982-04-16
KR840002491B1 (ko) 1984-12-31
FI812025L (fi) 1981-12-31
SG4585G (en) 1985-06-14
MY8501148A (en) 1985-12-31
ATA291581A (de) 1983-03-15
NO157400C (no) 1988-03-09
KR840002492B1 (ko) 1984-12-31
DE3125789A1 (de) 1982-05-19
CH654703A5 (de) 1986-02-28
SG4385G (en) 1985-06-14
SE8104061L (sv) 1981-12-31
NL192652B (nl) 1997-07-01
NO157399C (no) 1988-03-09
NO812218L (no) 1982-01-04
NL192652C (nl) 1997-11-04
AU7236581A (en) 1982-01-07
NL190214B (nl) 1993-07-01
AU545125B2 (en) 1985-07-04
DE3125790C2 (it) 1992-11-12
SG4285G (en) 1985-06-14
BR8104158A (pt) 1982-03-16
ATA291681A (de) 1988-03-15
NO812216L (no) 1982-01-04
NL8103122A (nl) 1982-01-18
SE8104063L (sv) 1981-12-31
SE447525B (sv) 1986-11-17
FI74368B (fi) 1987-09-30
FI76456B (fi) 1988-06-30
DK282581A (da) 1981-12-31
NO812217L (no) 1982-01-04
KR880000106B1 (ko) 1988-02-23
GB2079114A (en) 1982-01-13
GB2079112A (en) 1982-01-13
DE3125789C2 (de) 1984-01-12
HK28285A (en) 1985-04-12
FI74368C (fi) 1988-01-11
KR880000105B1 (ko) 1988-02-23
KR830006993A (ko) 1983-10-12
ES8204255A1 (es) 1982-04-16
AT386304B (de) 1988-08-10
MY8501147A (en) 1985-12-31
SE447524B (sv) 1986-11-17
ES503497A0 (es) 1982-11-01
NL8103124A (nl) 1982-01-18
DE3125788A1 (de) 1982-05-13
SE8104062L (sv) 1981-12-31
IT8122652A0 (it) 1981-06-30
IT1137987B (it) 1986-09-10
CH662684A5 (de) 1987-10-15
NL8103123A (nl) 1982-01-18
ES8300233A1 (es) 1982-10-01
NO157398C (no) 1988-03-09
IT8122650A0 (it) 1981-06-30
HK28485A (en) 1985-04-12
ATA291481A (de) 1987-12-15
DK282981A (da) 1981-12-31
FI76456C (fi) 1988-10-10
DK282881A (da) 1981-12-31
DE3125790A1 (de) 1982-05-13
AU7239481A (en) 1982-01-07

Similar Documents

Publication Publication Date Title
JP5488389B2 (ja) 音響信号処理装置
EP0596663B1 (en) A high efficiency encoding device and a noise spectrum modifying device and method
US4136314A (en) Adaptive signal weighting system
JPS6128162B2 (it)
DK172325B1 (da) Signalkompressor og signalekspander til brug i et transmissionssystem
US5610985A (en) Digital 3-channel transmission of left and right stereo signals and a center signal
US4815068A (en) Audio encoder for use with more than one decoder each having different characteristics
US2606970A (en) Method of and system for reducing noise in the transmission of signals
JP4221288B2 (ja) ディジタルオーディオ信号伝送の際の障害を隠蔽する方法
JPH0243381B2 (it)
JP4560858B2 (ja) 送受信装置
TWM550500U (zh) 音訊播放系統
JP3317966B2 (ja) 民生用及び準職業用オーディオ・コンプレッサ、エクスパンダ、及び雑音低減回路
RU2038704C1 (ru) Пространственная звуковоспроизводящая система
DK169693B1 (da) Fremgangsmåde og kredsløbsanordning for spektral korrektion og efterkorrektion
Tyler et al. A companding system for multichannel TV sound
JP3849164B2 (ja) オーディオ装置
CA1201388A (en) Improvements in audio compressors and expanders
Dolby A 20 dB audio noise reduction system for consumer applications
CA1219810A (en) Audio compressors and expanders
JPS6019564B2 (ja) 雑音低減装置
JPH04320199A (ja) 音響再生装置
JPS601701B2 (ja) 雑音低減装置
Peissig et al. Digital emulation of analog companding algorithms for FM radio transmission
JPH0452003B2 (it)

Legal Events

Date Code Title Description
B1 Patent granted (law 1993)
PUP Patent expired