BR8501854A - Aparelho para reduzir ruido em sinais de audio - Google Patents

Aparelho para reduzir ruido em sinais de audio

Info

Publication number
BR8501854A
BR8501854A BR8501854A BR8501854A BR8501854A BR 8501854 A BR8501854 A BR 8501854A BR 8501854 A BR8501854 A BR 8501854A BR 8501854 A BR8501854 A BR 8501854A BR 8501854 A BR8501854 A BR 8501854A
Authority
BR
Brazil
Prior art keywords
appliance
audio signals
reduce noise
noise
reduce
Prior art date
Application number
BR8501854A
Other languages
English (en)
Inventor
Shuzo Hitotsumachi
Original Assignee
Matsushita Electric Ind Co Ltd
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
Priority claimed from JP59080422A external-priority patent/JPS60223307A/ja
Priority claimed from JP59188365A external-priority patent/JPS6165627A/ja
Application filed by Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Publication of BR8501854A publication Critical patent/BR8501854A/pt

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/02—Analogue recording or reproducing
    • G11B20/025—Error detection or correction
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/348—Muting in response to a mechanical action or to power supply variations, e.g. during tuning; Click removal circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Noise Elimination (AREA)
BR8501854A 1984-04-20 1985-04-18 Aparelho para reduzir ruido em sinais de audio BR8501854A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59080422A JPS60223307A (ja) 1984-04-20 1984-04-20 雑音低減回路
JP59188365A JPS6165627A (ja) 1984-09-07 1984-09-07 雑音低減装置

Publications (1)

Publication Number Publication Date
BR8501854A true BR8501854A (pt) 1985-12-17

Family

ID=26421432

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8501854A BR8501854A (pt) 1984-04-20 1985-04-18 Aparelho para reduzir ruido em sinais de audio

Country Status (7)

Country Link
US (1) US4648118A (pt)
EP (1) EP0159042B1 (pt)
KR (1) KR900005064B1 (pt)
AU (1) AU562044B2 (pt)
BR (1) BR8501854A (pt)
CA (1) CA1229799A (pt)
DE (1) DE3584686D1 (pt)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0337025B1 (en) * 1988-04-08 1993-10-20 Hazeltine Corporation Beamforming/null-steering adaptive array
US4864561A (en) * 1988-06-20 1989-09-05 American Telephone And Telegraph Company Technique for improved subjective performance in a communication system using attenuated noise-fill
US5057785A (en) * 1990-01-23 1991-10-15 International Business Machines Corporation Method and circuitry to suppress additive disturbances in data channels
US5357150A (en) * 1992-11-06 1994-10-18 International Business Machines Corporation Defect tolerant envelope follower

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3374435A (en) * 1965-07-29 1968-03-19 Bell Telephone Labor Inc Reduction of the effect of impulse noise bursts
US4184178A (en) * 1972-11-30 1980-01-15 Basf Aktiengesellschaft Drop-out compensator for sound reproducing apparatus during tape reversal
US4076969A (en) * 1975-04-07 1978-02-28 Singer & Singer Impulse noise reduction system
JPS5287917A (en) * 1976-01-17 1977-07-22 Sanyo Electric Co Ltd Noise delection circuit
JPS5943852B2 (ja) * 1977-02-08 1984-10-25 株式会社日立製作所 信号ホ−ルド回路
JPS5514734A (en) * 1978-07-17 1980-02-01 Nec Corp Pulse noise elimination circuit
US4311963A (en) * 1978-07-18 1982-01-19 Matsushita Electric Industrial Co., Ltd. Noise pulse suppressing system
US4268793A (en) * 1978-10-12 1981-05-19 Kiyoshi Amazawa Noise eliminating circuit
CA1144081A (en) * 1979-04-27 1983-04-05 Sadao Kondo Noise removing apparatus
US4329714A (en) * 1980-11-26 1982-05-11 Rca Corporation Audio distortion eliminator
EP0063737B1 (de) * 1981-04-23 1986-03-19 TELEFUNKEN Fernseh und Rundfunk GmbH Videorecorder mit verbesserter Tonwiedergabe
JPS581829A (ja) * 1981-05-06 1983-01-07 Sony Corp ビデオテ−プレコ−ダ
JPS586506A (ja) * 1981-06-30 1983-01-14 Pioneer Video Corp 再生信号の時間軸補正装置
JPS58121882A (ja) * 1982-01-16 1983-07-20 Sony Corp 映像及び音声信号再生装置
JPS58130632A (ja) * 1982-01-29 1983-08-04 Hitachi Ltd パルス性雑音除去回路
EP0099760B1 (en) * 1982-07-21 1988-06-29 Victor Company Of Japan, Limited Circuit for reconstructing noise-affected signals
US4495643A (en) * 1983-03-31 1985-01-22 Orban Associates, Inc. Audio peak limiter using Hilbert transforms
DE3929030A1 (de) * 1989-09-01 1991-03-07 Boehringer Mannheim Gmbh Verfahren zur vermehrung von nukleinsaeuren

Also Published As

Publication number Publication date
DE3584686D1 (de) 1992-01-02
AU562044B2 (en) 1987-05-28
KR850007515A (ko) 1985-12-04
EP0159042A2 (en) 1985-10-23
AU4102685A (en) 1985-10-24
US4648118A (en) 1987-03-03
KR900005064B1 (ko) 1990-07-19
EP0159042B1 (en) 1991-11-21
EP0159042A3 (en) 1988-06-08
CA1229799A (en) 1987-12-01

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Legal Events

Date Code Title Description
B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 18/04/2000