DE3165470D1 - An electronic circuit for signal compression and expansion - Google Patents

An electronic circuit for signal compression and expansion

Info

Publication number
DE3165470D1
DE3165470D1 DE8181300456T DE3165470T DE3165470D1 DE 3165470 D1 DE3165470 D1 DE 3165470D1 DE 8181300456 T DE8181300456 T DE 8181300456T DE 3165470 T DE3165470 T DE 3165470T DE 3165470 D1 DE3165470 D1 DE 3165470D1
Authority
DE
Germany
Prior art keywords
expansion
electronic circuit
signal compression
compression
signal
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
DE8181300456T
Other languages
German (de)
English (en)
Inventor
John B Glaberson
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.)
CBS Broadcasting Inc
Original Assignee
CBS Inc
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 CBS Inc filed Critical CBS Inc
Application granted granted Critical
Publication of DE3165470D1 publication Critical patent/DE3165470D1/de
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
DE8181300456T 1980-05-29 1981-02-03 An electronic circuit for signal compression and expansion Expired DE3165470D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/154,729 US4376916A (en) 1980-05-29 1980-05-29 Signal compression and expansion system

Publications (1)

Publication Number Publication Date
DE3165470D1 true DE3165470D1 (en) 1984-09-20

Family

ID=22552524

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8181300456T Expired DE3165470D1 (en) 1980-05-29 1981-02-03 An electronic circuit for signal compression and expansion

Country Status (5)

Country Link
US (1) US4376916A (en, 2012)
EP (1) EP0041310B1 (en, 2012)
JP (2) JPS5723336A (en, 2012)
CA (1) CA1153315A (en, 2012)
DE (1) DE3165470D1 (en, 2012)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4449106A (en) * 1981-03-10 1984-05-15 Victor Company Of Japan, Ltd. Noise reducing apparatus
DE3139482A1 (de) * 1981-10-03 1983-04-21 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Expander fuer zur stoergeraeuschverminderung komprimierte audiosignale
DE3150436A1 (de) * 1981-12-19 1983-06-30 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektronischer verstaerker
US4500842A (en) * 1982-03-30 1985-02-19 Communications Satellite Corporation Adaptive gain variable bit rate NIC processor
US4467287A (en) * 1982-06-04 1984-08-21 Dbx, Inc. Signal expander
US4536846A (en) * 1982-09-20 1985-08-20 Rca Corporation Distortion reducer for companded analog systems
US4485483A (en) * 1983-03-18 1984-11-27 Torick Emil L FM Stereophonic system incorporating companding of difference signal
US4602380A (en) * 1985-01-04 1986-07-22 Cbs Inc. Compatible transmission techniques for FM stereophonic radio and television
BR8507150A (pt) * 1985-01-04 1987-03-31 Cbs Inc Sistema de radiodifusao estereofonico fm utilizando compressao/expansao de sinal de diferenca e tendo expansor dinamico auto-adaptavel
US4602381A (en) * 1985-01-04 1986-07-22 Cbs Inc. Adaptive expanders for FM stereophonic broadcasting system utilizing companding of difference signal
US4771464A (en) * 1986-01-30 1988-09-13 Broadcast Technology Partners FM stereophonic broadcasting system utilizing simultaneous companding and modulation/demodulation
JPS6397021A (ja) * 1986-10-13 1988-04-27 Mitsubishi Electric Corp 圧縮装置
US4739514A (en) * 1986-12-22 1988-04-19 Bose Corporation Automatic dynamic equalizing
CA1309665C (en) * 1987-06-27 1992-11-03 Kenzo Akagiri Amplitude compressing/expanding circuit
DE4109211A1 (de) * 1991-03-21 1992-09-24 Philips Patentverwaltung Schaltungsanordnung zur frequenzgangbeeinflussung eines digitalen audiosignals
JP2661404B2 (ja) * 1991-05-21 1997-10-08 日本電気株式会社 携帯電話装置
GB2264598B (en) * 1992-02-26 1995-10-04 Pioneer Electronic Corp Audio signal processing system
WO1995020434A1 (en) * 1994-01-27 1995-08-03 Engelhard Corporation Process for recovering catalyst supports
JPH09258782A (ja) * 1996-03-08 1997-10-03 Sony United Kingdom Ltd デジタル音声処理装置
DE19624362A1 (de) * 1996-06-19 1998-01-02 Philips Patentverwaltung Schaltungsanordnung zur Frequenzgangbeeinflussung eines digitalen Audiosignals
DE19637582A1 (de) * 1996-09-14 1998-03-19 Daimler Benz Ag Verstärkeranordnung hohen Wirkungsgrades
JP2001507911A (ja) * 1997-11-07 2001-06-12 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ オーディオ信号処理回路を有するオーディオシステム
EP1175812B1 (de) * 1999-04-30 2004-09-15 Sennheiser electronic GmbH & Co. KG Verfahren zur wiedergabe von audioschall mit ultraschall-lautsprechern
EP1254513A4 (en) * 1999-11-29 2009-11-04 Syfx SYSTEMS AND METHODS FOR SIGNAL PROCESSING
US7016509B1 (en) 2000-09-08 2006-03-21 Harman International Industries, Inc. System and method for varying low audio frequencies inversely with audio signal level
US6597301B2 (en) 2001-10-03 2003-07-22 Shure Incorporated Apparatus and method for level-dependent companding for wireless audio noise reduction
US20040114536A1 (en) * 2002-10-16 2004-06-17 O'rourke Aidan Method for communicating information on fast and slow paths
US7254535B2 (en) * 2004-06-30 2007-08-07 Motorola, Inc. Method and apparatus for equalizing a speech signal generated within a pressurized air delivery system
US7155388B2 (en) * 2004-06-30 2006-12-26 Motorola, Inc. Method and apparatus for characterizing inhalation noise and calculating parameters based on the characterization
US7139701B2 (en) * 2004-06-30 2006-11-21 Motorola, Inc. Method for detecting and attenuating inhalation noise in a communication system
US7706851B2 (en) * 2005-07-21 2010-04-27 Radioshack Corporation Compander, and associated methodology, for a radio communication station operable pursuant to a coded squelch scheme
US8842852B1 (en) * 2011-07-28 2014-09-23 James K. Waller, Jr. Audio dynamics processing control system with exponential release response

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230470A (en) * 1961-03-22 1966-01-18 Columbia Broadcasting Syst Inc Compressor and expander apparatus
GB1044004A (en) * 1962-06-07 1966-09-28 Emi Ltd Improvements in or relating to circuits for compressing or expanding the amplitude range of an input signal
GB1149891A (en) 1965-05-06 1969-04-23 Emi Ltd Improvements in or relating to the electrical control of audio frequency gain
BE753495A (fr) * 1969-07-21 1970-12-16 Dolby Laboratories Inc Filtres limiteurs perfectionnes pour systemes attenuateurs de bruit. (
JPS5227728B2 (en, 2012) * 1971-09-30 1977-07-22
GB1401336A (en) * 1971-10-05 1975-07-16 Victor Company Of Japan Expander circuit for a compression and expansion system
JPS592082B2 (ja) * 1976-09-10 1984-01-17 ソニー株式会社 音声信号のダイナミツクレンジ改善方法
JPS53102612A (en) * 1977-02-18 1978-09-07 Sanyo Electric Co Ltd Companding circuit for signal
GB2000945A (en) * 1977-07-11 1979-01-17 Dolby Lab Licensing Corp Improvements relating to signal compressors and expanders
JPS6017173B2 (ja) * 1977-08-22 1985-05-01 松下電器産業株式会社 雑音軽減装置
US4220929A (en) * 1978-12-26 1980-09-02 Dbx, Inc. Signal expander

Also Published As

Publication number Publication date
JPS5723336A (en) 1982-02-06
US4376916A (en) 1983-03-15
JPH01115343U (en, 2012) 1989-08-03
EP0041310B1 (en) 1984-08-15
JPH0317491Y2 (en, 2012) 1991-04-12
EP0041310A1 (en) 1981-12-09
CA1153315A (en) 1983-09-06

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee