GB201116348D0 - Dynamic range control - Google Patents

Dynamic range control

Info

Publication number
GB201116348D0
GB201116348D0 GBGB1116348.2A GB201116348A GB201116348D0 GB 201116348 D0 GB201116348 D0 GB 201116348D0 GB 201116348 A GB201116348 A GB 201116348A GB 201116348 D0 GB201116348 D0 GB 201116348D0
Authority
GB
United Kingdom
Prior art keywords
dynamic range
audio signal
transfer function
disclosed
determined
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.)
Withdrawn
Application number
GBGB1116348.2A
Other versions
GB2494894A (en
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.)
Earsoft Ltd
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
Priority to GB1116348.2A priority Critical patent/GB2494894A/en
Publication of GB201116348D0 publication Critical patent/GB201116348D0/en
Priority to EP12778773.7A priority patent/EP2759057A2/en
Priority to CN201280046326.7A priority patent/CN103828232A/en
Priority to KR1020147007801A priority patent/KR20140067064A/en
Priority to PCT/GB2012/052339 priority patent/WO2013041875A2/en
Priority to US14/345,614 priority patent/US20140369527A1/en
Publication of GB2494894A publication Critical patent/GB2494894A/en
Priority to IN2621CHN2014 priority patent/IN2014CN02621A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/007—Volume compression or expansion in amplifiers of digital or coded signals
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

A method for adjusting dynamic range of an audio signal comprises providing an input audio signal with a first dynamic range, mapping the first dynamic range to a second dynamic range using a transfer function 107 with a linear portion aligned to an average level of the input audio signal, and generating an output audio signal with the second dynamic range from the input audio signal. The average level 105 may be determined by a using a one pole filter. It is also disclosed that the average may be computed over a predetermined psychoacoustic timescale. A user input representing a desired dynamic range (a dynamic range tolerance or DRT) may be used to constrain the second dynamic range. The transfer function may be determined on the basis of the user input, and may be dynamically adjusted in response to changes in the noise floor of the listening environment. Fade-in and fade out portions of an audio signal are maintained. A multi-band approach is also disclosed, so that different frequency regions of a signal are compressed by different amounts.
GB1116348.2A 2011-09-22 2011-09-22 Dynamic range control Withdrawn GB2494894A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB1116348.2A GB2494894A (en) 2011-09-22 2011-09-22 Dynamic range control
EP12778773.7A EP2759057A2 (en) 2011-09-22 2012-09-21 Dynamic range control
CN201280046326.7A CN103828232A (en) 2011-09-22 2012-09-21 Dynamic range control
KR1020147007801A KR20140067064A (en) 2011-09-22 2012-09-21 Dynamic range control
PCT/GB2012/052339 WO2013041875A2 (en) 2011-09-22 2012-09-21 Dynamic range control
US14/345,614 US20140369527A1 (en) 2011-09-22 2012-09-21 Dynamic range control
IN2621CHN2014 IN2014CN02621A (en) 2011-09-22 2014-04-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1116348.2A GB2494894A (en) 2011-09-22 2011-09-22 Dynamic range control

Publications (2)

Publication Number Publication Date
GB201116348D0 true GB201116348D0 (en) 2011-11-02
GB2494894A GB2494894A (en) 2013-03-27

Family

ID=44937658

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1116348.2A Withdrawn GB2494894A (en) 2011-09-22 2011-09-22 Dynamic range control

Country Status (1)

Country Link
GB (1) GB2494894A (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5892834A (en) * 1997-06-30 1999-04-06 Ford Motor Company Audio level dynamic range compression
KR100561440B1 (en) * 2004-07-24 2006-03-17 삼성전자주식회사 Apparatus and method for compensating audio volume automatically in response to the change of channel
GB2429346B (en) * 2006-03-15 2007-10-17 Nec Technologies A method of adjusting the amplitude of an audio signal and an audio device
US7813825B2 (en) * 2006-07-10 2010-10-12 Apple Inc. Multiband dynamic range control graphical interface
WO2008078232A1 (en) * 2006-12-21 2008-07-03 Koninklijke Philips Electronics N.V. A system for processing audio data
US8804975B2 (en) * 2009-02-13 2014-08-12 University Of Florida Research Foundation, Incorporated Digital sound leveling device and method to reduce the risk of noise induced hearing loss

Also Published As

Publication number Publication date
GB2494894A (en) 2013-03-27

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Legal Events

Date Code Title Description
COOA Change in applicant's name or ownership of the application

Owner name: EARSOFT LIMITED

Free format text: FORMER OWNER: STEPHEN BALDWIN

WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)