JPS5026887B1 - - Google Patents
Info
- Publication number
- JPS5026887B1 JPS5026887B1 JP771872A JP771872A JPS5026887B1 JP S5026887 B1 JPS5026887 B1 JP S5026887B1 JP 771872 A JP771872 A JP 771872A JP 771872 A JP771872 A JP 771872A JP S5026887 B1 JPS5026887 B1 JP S5026887B1
- Authority
- JP
- Japan
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
- H04B1/64—Volume compression or expansion arrangements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
- H03G11/002—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general without controlling loop
-
- 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
- H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
-
- 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
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3439465A GB1120541A (en) | 1965-08-11 | 1965-08-11 | Improvements in noise reduction systems |
GB4313665 | 1965-10-11 | ||
GB236866 | 1966-01-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5026887B1 true JPS5026887B1 (en) | 1975-09-04 |
Family
ID=27254067
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP41052369A Pending JPS4841044B1 (en) | 1965-08-11 | 1966-08-11 | |
JP47007717A Pending JPS4842361B1 (en) | 1965-08-11 | 1972-01-21 | |
JP771872A Pending JPS5026887B1 (en) | 1965-08-11 | 1972-01-21 | |
JP13183273A Pending JPS5114842B1 (en) | 1965-08-11 | 1973-11-26 |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP41052369A Pending JPS4841044B1 (en) | 1965-08-11 | 1966-08-11 | |
JP47007717A Pending JPS4842361B1 (en) | 1965-08-11 | 1972-01-21 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13183273A Pending JPS5114842B1 (en) | 1965-08-11 | 1973-11-26 |
Country Status (6)
Country | Link |
---|---|
JP (4) | JPS4841044B1 (en) |
BE (1) | BE712376A (en) |
CH (1) | CH467560A (en) |
DE (1) | DE1487276C3 (en) |
GB (1) | GB1120541A (en) |
NL (1) | NL147297B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60111137A (en) * | 1983-11-18 | 1985-06-17 | Shimadzu Corp | Constant load material testing machine |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1338227A (en) * | 1970-01-23 | 1973-11-21 | Dalby Lab Inc | Limiters for noise reduction systems |
GB1390341A (en) * | 1971-03-12 | 1975-04-09 | Dolby Laboratories Inc | Signal compressors and expanders |
NL163388C (en) * | 1971-05-04 | 1980-08-15 | Philips Nv | NOISE REDUCTION CIRCUIT. |
US3729693A (en) * | 1971-08-02 | 1973-04-24 | R Dolby | Compressor/expander switching methods and apparatus |
GB1438711A (en) * | 1973-01-23 | 1976-06-09 | Dolby Laboratories Inc | Calibration oscillators for noise reduction systems |
CA1000617A (en) * | 1973-05-17 | 1976-11-30 | Ray M. Dolby | Compressors, expanders and noise reduction systems |
DE2530144C3 (en) * | 1975-07-05 | 1981-11-19 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Amplifier with variable transmission |
DE2542745C2 (en) * | 1975-09-25 | 1983-06-09 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Amplifier with variable transmission, especially for a compander system |
DE2655325C2 (en) * | 1976-12-07 | 1984-01-26 | Saba Gmbh, 7730 Villingen-Schwenningen | Magnetic tape recorder with an effective noise suppression circuit during playback |
GB2002204B (en) * | 1977-08-06 | 1982-01-27 | Licentia Gmbh | Dynamic compression or expansion circuits |
JPS5439516A (en) * | 1977-09-02 | 1979-03-27 | Sanyo Electric Co Ltd | Noise reduction unit |
JPS55156431A (en) * | 1979-05-24 | 1980-12-05 | Sony Corp | Noise reduction system |
CA1184506A (en) * | 1980-04-21 | 1985-03-26 | Akira Komatsu | Method and system for discriminating human voice signal |
US4540946A (en) * | 1980-06-06 | 1985-09-10 | National Research Development Corp. | Variable characteristic filters |
DE3029441A1 (en) * | 1980-08-02 | 1982-03-04 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Dynamic compression and expansion circuit for an analogue signal - has detector, quantitation device, store and arithmetic unit |
JPS5744338A (en) * | 1980-08-29 | 1982-03-12 | Victor Co Of Japan Ltd | Noise reduction device |
FR2490856B1 (en) * | 1980-09-22 | 1985-09-27 | Elison Sarl | APPARATUS FOR REDUCING BACKGROUND NOISE OF THE REAL-TIME SPECTRAL ANALYSIS TYPE |
JPS5769891A (en) * | 1980-10-17 | 1982-04-28 | Tokyo Shibaura Electric Co | Washing machine doubling as hydroextracting |
JPS57138009A (en) * | 1981-02-20 | 1982-08-26 | Hitachi Ltd | Magnetic recorder and reproducer |
JPS57140085A (en) * | 1981-02-23 | 1982-08-30 | Hitachi Ltd | Audio signal recording and reproducing circuit |
JPS5866064A (en) * | 1981-10-15 | 1983-04-20 | Toshiba Corp | Level detecting circuit |
GB2111355B (en) * | 1981-12-01 | 1985-02-13 | Ray Milton Dolby | Improvements in circuit arrangements for modifying dynamic range |
DE3305938A1 (en) * | 1983-02-21 | 1984-08-23 | Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover | Circuit arrangement for generating a DC control voltage dependent on an AC voltage |
DE3323751C1 (en) * | 1983-07-01 | 1984-11-22 | Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover | System for the transmission of a frequency-modulated sound carrier |
GB2189366B (en) * | 1986-04-17 | 1989-12-28 | British Broadcasting Corp | Method and apparatus for conveying information signals |
US5253299A (en) * | 1989-02-03 | 1993-10-12 | Pioneer Electronic Corporation | Noise reduction apparatus in an FM stereo tuner |
DE3939478C2 (en) * | 1989-02-03 | 1994-09-22 | Pioneer Electronic Corp | Noise reduction device in an FM stereo tuner |
KR920007607B1 (en) * | 1989-09-01 | 1992-09-08 | 삼성전자 주식회사 | Contrast adjusting circuit in digital television receiver |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE754298C (en) * | 1935-07-04 | 1952-07-17 | Emi Ltd | Low-frequency transmission system with automatic amplitude control through an impedance multi-grating tube connected across the transmission path |
US2171671A (en) * | 1936-05-20 | 1939-09-05 | Emi Ltd | Thermionic valve circuit |
GB643574A (en) * | 1946-01-19 | 1950-09-20 | Hermon Hosmer Scott | Improvements in apparatus or systems for transmitting electric signals |
US2817715A (en) * | 1952-07-15 | 1957-12-24 | California Research Corp | Amplifier circuit having linear and non-linear amplification ranges |
US2925529A (en) * | 1952-11-04 | 1960-02-16 | Bell Telephone Labor Inc | Non-linear transmission circuits |
DE1048950B (en) * | 1956-07-19 | 1959-01-22 | Siemens Ag | Message transmission system with an arrangement for noise suppression |
GB856892A (en) * | 1957-11-14 | 1960-12-21 | Collins Radio Co | Means for reducing the threshold of angular-modulation receivers |
US2969459A (en) * | 1957-11-14 | 1961-01-24 | Collins Radio Co | Method and means for reducing the threshold of angular-modulation receivers |
DE1120171B (en) * | 1959-12-24 | 1961-12-21 | Carl Lindstroem Ges M B H | Method for increasing the mean modulation of sound recordings |
US3111635A (en) * | 1960-05-05 | 1963-11-19 | Fairchild Recording Equipment | Method and apparatus for eliminating overloading in modulating systems having pre-emphasis means |
FR1374370A (en) * | 1963-06-07 | 1964-10-09 | Emi Ltd | Improvements in recording and transmission of sounds |
FR1392138A (en) * | 1964-04-08 | 1965-03-12 | Rca Corp | Device for the transmission of audible sounds |
-
1965
- 1965-08-11 GB GB3439465A patent/GB1120541A/en not_active Expired
-
1966
- 1966-08-08 NL NL6611156A patent/NL147297B/en not_active IP Right Cessation
- 1966-08-09 CH CH1140866A patent/CH467560A/en unknown
- 1966-08-10 DE DE19661487276 patent/DE1487276C3/en not_active Expired
- 1966-08-11 JP JP41052369A patent/JPS4841044B1/ja active Pending
-
1968
- 1968-03-18 BE BE712376D patent/BE712376A/xx not_active IP Right Cessation
-
1972
- 1972-01-21 JP JP47007717A patent/JPS4842361B1/ja active Pending
- 1972-01-21 JP JP771872A patent/JPS5026887B1/ja active Pending
-
1973
- 1973-11-26 JP JP13183273A patent/JPS5114842B1/ja active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60111137A (en) * | 1983-11-18 | 1985-06-17 | Shimadzu Corp | Constant load material testing machine |
Also Published As
Publication number | Publication date |
---|---|
JPS4842361B1 (en) | 1973-12-12 |
DE1487276B2 (en) | 1975-02-20 |
NL6611156A (en) | 1967-02-13 |
JPS4841044B1 (en) | 1973-12-04 |
NL147297B (en) | 1975-09-15 |
BE712376A (en) | 1968-07-31 |
CH467560A (en) | 1969-01-15 |
DE1487276C3 (en) | 1982-01-07 |
JPS5114842B1 (en) | 1976-05-12 |
GB1120541A (en) | 1968-07-17 |
DE1487276A1 (en) | 1969-03-20 |