EE03456B1 - Adaptive filtering system for audio signals to improve speech clarity in noisy environments - Google Patents

Adaptive filtering system for audio signals to improve speech clarity in noisy environments

Info

Publication number
EE03456B1
EE03456B1 EE9800068A EE9800068A EE03456B1 EE 03456 B1 EE03456 B1 EE 03456B1 EE 9800068 A EE9800068 A EE 9800068A EE 9800068 A EE9800068 A EE 9800068A EE 03456 B1 EE03456 B1 EE 03456B1
Authority
EE
Estonia
Prior art keywords
audio signals
filtering system
adaptive filtering
noisy environments
improve speech
Prior art date
Application number
EE9800068A
Other languages
Estonian (et)
Other versions
EE9800068A (en
Inventor
W. S�lve Torbj�rn
Original Assignee
Ericsson 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 Ericsson Inc. filed Critical Ericsson Inc.
Publication of EE9800068A publication Critical patent/EE9800068A/en
Publication of EE03456B1 publication Critical patent/EE03456B1/en

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
    • 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
    • G10L2021/02168—Noise filtering characterised by the method used for estimating noise the estimation exclusively taking place during speech pauses
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Noise Elimination (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
EE9800068A 1995-09-14 1996-09-13 Adaptive filtering system for audio signals to improve speech clarity in noisy environments EE03456B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52800595A 1995-09-14 1995-09-14
PCT/US1996/014665 WO1997010586A1 (en) 1995-09-14 1996-09-13 System for adaptively filtering audio signals to enhance speech intelligibility in noisy environmental conditions

Publications (2)

Publication Number Publication Date
EE9800068A EE9800068A (en) 1998-08-17
EE03456B1 true EE03456B1 (en) 2001-06-15

Family

ID=24103874

Family Applications (1)

Application Number Title Priority Date Filing Date
EE9800068A EE03456B1 (en) 1995-09-14 1996-09-13 Adaptive filtering system for audio signals to improve speech clarity in noisy environments

Country Status (15)

Country Link
EP (1) EP0852052B1 (en)
JP (1) JPH11514453A (en)
KR (1) KR100423029B1 (en)
CN (1) CN1121684C (en)
AU (1) AU724111B2 (en)
BR (1) BR9610290A (en)
CA (1) CA2231107A1 (en)
DE (1) DE69613380D1 (en)
EE (1) EE03456B1 (en)
MX (1) MX9801857A (en)
NO (1) NO981074L (en)
PL (1) PL185513B1 (en)
RU (1) RU2163032C2 (en)
TR (1) TR199800475T1 (en)
WO (1) WO1997010586A1 (en)

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WO1997010586A1 (en) 1997-03-20
DE69613380D1 (en) 2001-07-19
MX9801857A (en) 1998-11-29
RU2163032C2 (en) 2001-02-10
TR199800475T1 (en) 1998-06-22
KR19990044659A (en) 1999-06-25
JPH11514453A (en) 1999-12-07
KR100423029B1 (en) 2004-07-01
AU7078496A (en) 1997-04-01
CN1201547A (en) 1998-12-09
PL325532A1 (en) 1998-08-03
NO981074D0 (en) 1998-03-11
CN1121684C (en) 2003-09-17
EP0852052B1 (en) 2001-06-13
BR9610290A (en) 1999-03-16
EP0852052A1 (en) 1998-07-08
CA2231107A1 (en) 1997-03-20
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PL185513B1 (en) 2003-05-30
NO981074L (en) 1998-05-13

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