DE3774296D1 - Schaltungen zum aendern des dynamikbereichs von audiosignalen. - Google Patents

Schaltungen zum aendern des dynamikbereichs von audiosignalen.

Info

Publication number
DE3774296D1
DE3774296D1 DE8787301709T DE3774296T DE3774296D1 DE 3774296 D1 DE3774296 D1 DE 3774296D1 DE 8787301709 T DE8787301709 T DE 8787301709T DE 3774296 T DE3774296 T DE 3774296T DE 3774296 D1 DE3774296 D1 DE 3774296D1
Authority
DE
Germany
Prior art keywords
circuits
changing
dynamic range
audio signals
audio
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
DE8787301709T
Other languages
English (en)
Inventor
Ray Milton Dolby
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.)
Dolby Laboratories Licensing Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of DE3774296D1 publication Critical patent/DE3774296D1/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
    • H03G7/004—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers using continuously variable impedance devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/04—Modifications of control circuit to reduce distortion caused by control
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/24—Frequency-independent attenuators
    • H03H11/245—Frequency-independent attenuators using field-effect transistor

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
DE8787301709T 1986-03-03 1987-02-26 Schaltungen zum aendern des dynamikbereichs von audiosignalen. Expired - Lifetime DE3774296D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/835,243 US4922535A (en) 1986-03-03 1986-03-03 Transient control aspects of circuit arrangements for altering the dynamic range of audio signals

Publications (1)

Publication Number Publication Date
DE3774296D1 true DE3774296D1 (de) 1991-12-12

Family

ID=25269020

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787301709T Expired - Lifetime DE3774296D1 (de) 1986-03-03 1987-02-26 Schaltungen zum aendern des dynamikbereichs von audiosignalen.

Country Status (5)

Country Link
US (1) US4922535A (de)
EP (1) EP0236076B1 (de)
JP (1) JP2623247B2 (de)
KR (1) KR870009544A (de)
DE (1) DE3774296D1 (de)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5170434A (en) * 1988-08-30 1992-12-08 Beltone Electronics Corporation Hearing aid with improved noise discrimination
US5185806A (en) * 1989-04-03 1993-02-09 Dolby Ray Milton Audio compressor, expander, and noise reduction circuits for consumer and semi-professional use
US5170437A (en) * 1990-10-17 1992-12-08 Audio Teknology, Inc. Audio signal energy level detection method and apparatus
US5424881A (en) 1993-02-01 1995-06-13 Cirrus Logic, Inc. Synchronous read channel
JPH0774560A (ja) * 1993-04-28 1995-03-17 Night Technol Internatl 音響システム用利得／等化回路
US5892833A (en) * 1993-04-28 1999-04-06 Night Technologies International Gain and equalization system and method
US5910995A (en) * 1995-11-22 1999-06-08 Sony Corporation Of Japan DSP decoder for decoding analog SR encoded audio signals
CN1116737C (zh) 1998-04-14 2003-07-30 听觉增强有限公司 用户可调节的适应听力的音量控制
US7415120B1 (en) 1998-04-14 2008-08-19 Akiba Electronics Institute Llc User adjustable volume control that accommodates hearing
US6034568A (en) * 1998-06-15 2000-03-07 International Business Machines Corporation Broadband dc amplifier technique with very low offset voltage
US6324501B1 (en) * 1999-08-18 2001-11-27 At&T Corp. Signal dependent speech modifications
US6947567B1 (en) * 1999-11-12 2005-09-20 Bbe Sound Inc. Audio boost circuit
US6795740B1 (en) 2000-03-01 2004-09-21 Apple Computer, Inc. Rectifying overflow and underflow in equalized audio waveforms
US6928170B1 (en) 2000-11-02 2005-08-09 Audio Technica, Inc. Wireless microphone having a split-band audio frequency companding system that provides improved noise reduction and sound quality
KR101190875B1 (ko) * 2004-01-30 2012-10-15 프랑스 뗄레콤 차원 벡터 및 가변 분해능 양자화
CA2992097C (en) 2004-03-01 2018-09-11 Dolby Laboratories Licensing Corporation Reconstructing audio signals with multiple decorrelation techniques and differentially coded parameters
EP1941635A1 (de) * 2005-09-13 2008-07-09 Barnett, Danielle Üerbtragung von audiosignalen über faseroptik
US8521314B2 (en) * 2006-11-01 2013-08-27 Dolby Laboratories Licensing Corporation Hierarchical control path with constraints for audio dynamics processing
EP2134105B1 (de) * 2008-06-12 2015-08-26 Alpine Electronics, Inc. Tonverarbeitungsvorrichtung und Verfahren zur Verarbeitung von Frequenzeigenschaftskorrekturen für ein Toneingangssignal
US20100046764A1 (en) * 2008-08-21 2010-02-25 Paul Wolff Method and Apparatus for Detecting and Processing Audio Signal Energy Levels
EP2352225A1 (de) * 2008-10-17 2011-08-03 Sharp Kabushiki Kaisha Vorrichtung zur tonsignaleinstellung und verfahren zur tonsignaleinstellung
EP2477418B1 (de) * 2011-01-12 2014-06-04 Nxp B.V. Signalverarbeitungsverfahren
WO2017080835A1 (en) * 2015-11-10 2017-05-18 Dolby International Ab Signal-dependent companding system and method to reduce quantization noise
CN105915186B (zh) * 2016-04-11 2023-03-24 延锋伟世通汽车电子有限公司 音频检测控制及诊断电路
US10755722B2 (en) * 2018-08-29 2020-08-25 Guoguang Electric Company Limited Multiband audio signal dynamic range compression with overshoot suppression

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US28426A (en) * 1860-05-22 Shortening tires
US3903485A (en) * 1968-01-10 1975-09-02 Ray Milton Dolby Compressors, expanders and noise reduction systems
US3846719A (en) * 1973-09-13 1974-11-05 Dolby Laboratories Inc Noise reduction systems
JPS51127608A (en) * 1975-04-30 1976-11-06 Victor Co Of Japan Ltd Signal transmitting unit
DE2906192A1 (de) * 1979-02-17 1980-08-28 Licentia Gmbh Steuerspannungserzeuger fuer ein system zur dynamik-kompression und/oder -expansion
JPS56162522A (en) * 1980-05-19 1981-12-14 Hitachi Ltd Switching type signal compressor and signal expander
US4490691A (en) * 1980-06-30 1984-12-25 Dolby Ray Milton Compressor-expander circuits and, circuit arrangements for modifying dynamic range, for suppressing mid-frequency modulation effects and for reducing media overload
JPS57155841A (en) * 1981-03-23 1982-09-27 Victor Co Of Japan Ltd Noise reduction device
US4498055A (en) * 1981-09-10 1985-02-05 Dolby Ray Milton Circuit arrangements for modifying dynamic range
JPS58106907A (ja) * 1981-12-01 1983-06-25 レ−・ミルトン・ドルビ ダイナミックレンジ修正回路装置
GB2111355B (en) * 1981-12-01 1985-02-13 Ray Milton Dolby Improvements in circuit arrangements for modifying dynamic range

Also Published As

Publication number Publication date
JPS62264733A (ja) 1987-11-17
EP0236076A3 (en) 1989-02-08
KR870009544A (ko) 1987-10-27
US4922535A (en) 1990-05-01
EP0236076A2 (de) 1987-09-09
JP2623247B2 (ja) 1997-06-25
EP0236076B1 (de) 1991-11-06

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Free format text: HOFFMANN, E., DIPL.-ING., PAT.-ANW., 82166 GRAEFELFING

8327 Change in the person/name/address of the patent owner

Owner name: DOLBY LABORATORIES LICENSING CORP., SAN FRANCISCO,

8381 Inventor (new situation)

Inventor name: DOLBY, RAY MILTON, SAN FRANCISCO, CALIF., US