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DE69531360D1 - Signalkonditionierungsschaltung zum komprimieren von audiosignalen - Google Patents

Signalkonditionierungsschaltung zum komprimieren von audiosignalen

Info

Publication number
DE69531360D1
DE69531360D1 DE69531360T DE69531360T DE69531360D1 DE 69531360 D1 DE69531360 D1 DE 69531360D1 DE 69531360 T DE69531360 T DE 69531360T DE 69531360 T DE69531360 T DE 69531360T DE 69531360 D1 DE69531360 D1 DE 69531360D1
Authority
DE
Germany
Prior art keywords
audio signals
signal conditioning
conditioning circuit
compressing audio
compressing
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 - Lifetime
Application number
DE69531360T
Other languages
English (en)
Other versions
DE69531360T2 (de
Inventor
R Frey
Patrick Copley
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.)
Analog Devices Inc
Original Assignee
Analog Devices 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 Analog Devices Inc filed Critical Analog Devices Inc
Publication of DE69531360D1 publication Critical patent/DE69531360D1/de
Application granted granted Critical
Publication of DE69531360T2 publication Critical patent/DE69531360T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/06—Volume compression or expansion in amplifiers having semiconductor devices
    • 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)
  • Amplifiers (AREA)
DE69531360T 1995-06-06 1995-08-31 Signalkonditionierungsschaltung zum komprimieren von audiosignalen Expired - Lifetime DE69531360T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US469440 1995-06-06
US08/469,440 US5631968A (en) 1995-06-06 1995-06-06 Signal conditioning circuit for compressing audio signals
PCT/US1995/011078 WO1996039744A1 (en) 1995-06-06 1995-08-31 Signal conditioning circuit for compressing audio signals

Publications (2)

Publication Number Publication Date
DE69531360D1 true DE69531360D1 (de) 2003-08-28
DE69531360T2 DE69531360T2 (de) 2004-02-12

Family

ID=23863814

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69531360T Expired - Lifetime DE69531360T2 (de) 1995-06-06 1995-08-31 Signalkonditionierungsschaltung zum komprimieren von audiosignalen

Country Status (6)

Country Link
US (1) US5631968A (de)
EP (1) EP0830731B1 (de)
JP (1) JPH11511300A (de)
AU (1) AU3542795A (de)
DE (1) DE69531360T2 (de)
WO (1) WO1996039744A1 (de)

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US5796842A (en) * 1996-06-07 1998-08-18 That Corporation BTSC encoder
US8908872B2 (en) * 1996-06-07 2014-12-09 That Corporation BTSC encoder
US5953067A (en) * 1997-02-10 1999-09-14 Cable Electronics, Inc. Multichannel television sound stereo and surround sound encoder
US5892834A (en) * 1997-06-30 1999-04-06 Ford Motor Company Audio level dynamic range compression
EP0948132B1 (de) * 1998-03-31 2004-05-26 STMicroelectronics S.r.l. Verstärker mit programmierbarer Verstärkungs- und Eingangslinearität für Hochfrequenzleitungen
US6516068B1 (en) * 1998-08-25 2003-02-04 Lucent Technologies Inc. Microphone expander
EP1811660B1 (de) * 1999-03-30 2013-10-09 Qualcomm Incorporated Verfahren und Vorrichtung zum automatischen Einstellen der Verstärkung des Sprecherverstärkers in einem tragbaren Telephon
US6369648B1 (en) * 1999-04-21 2002-04-09 Hughes Electronics Corporation Linear traveling wave tube amplifier utilizing input drive limiter for optimization
US7190292B2 (en) 1999-11-29 2007-03-13 Bizjak Karl M Input level adjust system and method
WO2001039370A2 (en) 1999-11-29 2001-05-31 Syfx Signal processing system and method
DE10050150A1 (de) * 2000-10-11 2002-04-18 Alcatel Sa Dynamikreduzierung für dynamikbegrenzte Audiosysteme
GB2369504A (en) * 2000-11-28 2002-05-29 Ubinetics Ltd Gain control in a receiver using a parameter to determine if gain should be adjusted in order to bring a signal amplitude within a defined range
US6870830B1 (en) 2000-11-30 2005-03-22 3Com Corporation System and method for performing messaging services using a data communications channel in a data network telephone system
US6594368B2 (en) * 2001-02-21 2003-07-15 Digisonix, Llc DVE system with dynamic range processing
US6809589B2 (en) * 2002-06-13 2004-10-26 Engim, Inc. Low voltage large swing/high linearity analog buffer with servo amplifier and feedback loop
DE10249495B3 (de) * 2002-10-24 2004-05-27 Daimlerchrysler Ag Vorrichtung zum Testen von Lautsprechern auf Funktionsfähigkeit
CN101095371B (zh) * 2004-12-26 2012-09-26 Biamp系统集团有限公司 改进的寻呼系统
KR100638337B1 (ko) * 2005-09-05 2006-10-24 주식회사 비손하이테크 주변소음 제거장치 및 방법과 이를 구비한 이동통신 단말기
US8249271B2 (en) * 2007-01-23 2012-08-21 Karl M. Bizjak Noise analysis and extraction systems and methods
KR101361052B1 (ko) * 2007-02-14 2014-02-10 삼성전자주식회사 휴대용 오디오 장치의 오디오 신호 출력 레벨 제어 방법 및그 장치
WO2008116264A1 (en) * 2007-03-26 2008-10-02 Cochlear Limited Noise reduction in auditory prostheses
WO2009029782A1 (en) * 2007-08-31 2009-03-05 Analog Devices, Inc. Variable automatic limit control (alc) threshold for any desired compression curve
US20090192793A1 (en) * 2008-01-30 2009-07-30 Desmond Arthur Smith Method for instantaneous peak level management and speech clarity enhancement
US8059836B2 (en) * 2008-02-21 2011-11-15 Mediatek Inc. Microphone bias circuits
CA2729678A1 (en) * 2008-06-30 2010-01-07 Able Planet, Incorporated Method and system for auditory enhancement and hearing conservation
DE102010012269B4 (de) * 2010-03-22 2012-10-04 Austriamicrosystems Ag Differenzverstärker und Verfahren zum Betreiben eines Differenzverstärkers
KR20140069701A (ko) * 2012-11-29 2014-06-10 한국전자통신연구원 능동 소자의 대신호 모델 구성 방법
US10034092B1 (en) 2016-09-22 2018-07-24 Apple Inc. Spatial headphone transparency
US12160172B2 (en) * 2019-12-17 2024-12-03 Rohm Co., Ltd. Output feedback control circuit and switching power supply including the same
GB2605202A (en) * 2021-03-26 2022-09-28 Audoo Ltd Audio interface
US11688383B2 (en) * 2021-08-27 2023-06-27 Apple Inc. Context aware compressor for headphone audio feedback path

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919654A (en) * 1974-08-14 1975-11-11 Bell Telephone Labor Inc Syllabic compandor
US4250471A (en) * 1978-05-01 1981-02-10 Duncan Michael G Circuit detector and compression-expansion networks utilizing same
US4368435A (en) * 1980-10-03 1983-01-11 Alfred F. Eberhardt System for maximum efficient transfer of modulated audio frequency energy
US4377792A (en) * 1981-03-26 1983-03-22 Dbx, Inc. Compander system
CA1177588A (en) * 1982-02-12 1984-11-06 Ernst A. Munter Digital circuit and method for the detection of call progress tones in telephone systems
US4466119A (en) * 1983-04-11 1984-08-14 Industrial Research Products, Inc. Audio loudness control system
US4696044A (en) * 1986-09-29 1987-09-22 Waller Jr James K Dynamic noise reduction with logarithmic control
DE3875650D1 (de) * 1987-05-15 1992-12-10 Standard Elektrik Lorenz Ag Schaltungsanordnung zur sprachsteuerung fuer ein endgeraet der nachrichtentechnik.
US5404315A (en) * 1991-04-30 1995-04-04 Sharp Kabushiki Kaisha Automatic sound gain control device and a sound recording/reproducing device including arithmetic processor conducting a non-linear conversion
JP3295440B2 (ja) * 1991-09-10 2002-06-24 パイオニア株式会社 オーディオ装置における信号処理回路

Also Published As

Publication number Publication date
EP0830731B1 (de) 2003-07-23
AU3542795A (en) 1996-12-24
WO1996039744A1 (en) 1996-12-12
EP0830731A4 (de) 2000-07-19
US5631968A (en) 1997-05-20
EP0830731A1 (de) 1998-03-25
JPH11511300A (ja) 1999-09-28
DE69531360T2 (de) 2004-02-12

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition