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AU8050998A - Method and apparatus for low complexity noise reduction - Google Patents

Method and apparatus for low complexity noise reduction

Info

Publication number
AU8050998A
AU8050998A AU80509/98A AU8050998A AU8050998A AU 8050998 A AU8050998 A AU 8050998A AU 80509/98 A AU80509/98 A AU 80509/98A AU 8050998 A AU8050998 A AU 8050998A AU 8050998 A AU8050998 A AU 8050998A
Authority
AU
Australia
Prior art keywords
noise reduction
low complexity
complexity noise
low
reduction
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.)
Abandoned
Application number
AU80509/98A
Inventor
Bjorn Olof Peter Ekelund
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of AU8050998A publication Critical patent/AU8050998A/en
Abandoned legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • 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
    • H03G7/06—Volume compression or expansion in amplifiers having semiconductor devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6008—Substation equipment, e.g. for use by subscribers including speech amplifiers in the transmitter circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/78—Detection of presence or absence of voice signals
    • G10L2025/783—Detection of presence or absence of voice signals based on threshold decision
    • G10L2025/786—Adaptive threshold
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L21/0232—Processing in the frequency domain
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H04M1/6041—Portable telephones adapted for handsfree use

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Noise Elimination (AREA)
AU80509/98A 1997-06-16 1998-06-16 Method and apparatus for low complexity noise reduction Abandoned AU8050998A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US87490597A 1997-06-16 1997-06-16
US08874905 1997-06-16
PCT/SE1998/001161 WO1998058448A1 (en) 1997-06-16 1998-06-16 Method and apparatus for low complexity noise reduction

Publications (1)

Publication Number Publication Date
AU8050998A true AU8050998A (en) 1999-01-04

Family

ID=25364836

Family Applications (1)

Application Number Title Priority Date Filing Date
AU80509/98A Abandoned AU8050998A (en) 1997-06-16 1998-06-16 Method and apparatus for low complexity noise reduction

Country Status (2)

Country Link
AU (1) AU8050998A (en)
WO (1) WO1998058448A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6243003B1 (en) 1999-08-25 2001-06-05 Donnelly Corporation Accessory module for vehicle
US6278377B1 (en) 1999-08-25 2001-08-21 Donnelly Corporation Indicator for vehicle accessory
US6420975B1 (en) 1999-08-25 2002-07-16 Donnelly Corporation Interior rearview mirror sound processing system
FR2823385B1 (en) * 2001-04-10 2003-05-30 Thomson Csf DEVICE FOR ANALOGUE CONDITIONING OF A VOICE SIGNAL IN A DIGITAL SPEECH PROCESSING CHAIN IN A NOISE ENVIRONMENT
AU2002245950B2 (en) * 2001-04-11 2007-10-18 Cochlear Limited Variable sensitivity control for a cochlear implant
AUPR438601A0 (en) * 2001-04-11 2001-05-17 Cochlear Limited Variable sensitivity control for a cochlear implant
SK11342003A3 (en) * 2003-09-09 2005-04-01 Open Nt, S. R. O., Masaryk Michal, Ing. Device for noise reduction in reverse direction cable television
EP1531605B1 (en) 2003-11-12 2009-01-07 Harman/Becker Automotive Systems GmbH Method and system for noise reduction of a sound signal
GB0414420D0 (en) * 2004-06-28 2004-07-28 Cambridge Silicon Radio Ltd Speech activity detection
EP1729410A1 (en) * 2005-06-02 2006-12-06 Sony Ericsson Mobile Communications AB Device and method for audio signal gain control
ATE485583T1 (en) 2005-08-02 2010-11-15 Koninkl Philips Electronics Nv IMPROVEMENT OF SPEECH UNDERSTANDABILITY IN A MOBILE COMMUNICATIONS DEVICE BY CONTROLLING THE FUNCTION OF A VIBRATOR DEPENDENT ON THE BACKGROUND SOUND
EP1942637B1 (en) * 2005-10-26 2016-01-27 NEC Corporation Phone terminal and signal processing method
US9049524B2 (en) 2007-03-26 2015-06-02 Cochlear Limited Noise reduction in auditory prostheses
US20090010453A1 (en) * 2007-07-02 2009-01-08 Motorola, Inc. Intelligent gradient noise reduction system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06216986A (en) * 1993-01-19 1994-08-05 Mitsubishi Electric Corp Hand-free speech circuit
JP2845130B2 (en) * 1994-05-13 1999-01-13 日本電気株式会社 Communication device
FI102337B1 (en) * 1995-09-13 1998-11-13 Nokia Mobile Phones Ltd Method and circuit arrangement for processing an audio signal

Also Published As

Publication number Publication date
WO1998058448A1 (en) 1998-12-23

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Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase