HU0003010D0 - Signal purification method for the discrimination of a signal from background noise - Google Patents

Signal purification method for the discrimination of a signal from background noise

Info

Publication number
HU0003010D0
HU0003010D0 HU0003010A HUP0003010A HU0003010D0 HU 0003010 D0 HU0003010 D0 HU 0003010D0 HU 0003010 A HU0003010 A HU 0003010A HU P0003010 A HUP0003010 A HU P0003010A HU 0003010 D0 HU0003010 D0 HU 0003010D0
Authority
HU
Hungary
Prior art keywords
signal
signals
sub
way
background noise
Prior art date
Application number
HU0003010A
Other languages
Hungarian (hu)
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 filed Critical
Priority to HU0003010A priority Critical patent/HUP0003010A2/en
Publication of HU0003010D0 publication Critical patent/HU0003010D0/en
Priority to PCT/EP2001/008827 priority patent/WO2002011125A1/en
Priority to AU2001282047A priority patent/AU2001282047A1/en
Publication of HUP0003010A2 publication Critical patent/HUP0003010A2/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
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/0204—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders using subband decomposition
    • 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
    • G10L2021/02161—Number of inputs available containing the signal or the noise to be suppressed
    • 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

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)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

The subject of the invention is a signal cleaning procedure to isolate audio-frequency signals from the background noise. During the procedure, the signal to be cleaned is led into a filter bank and the signals separated into sub-bands will be sent into a transformer unit where a transformation will be performed upon them and this way a cleaned signal will be produced. It is a typical feature of the procedure that the instantaneous amplitude or the approximated value of the amplitude of the signal of each sub-band appearing at the output (1a) of the filter bank (1) is produced first in the transformer unit, then the instantaneous amplitude values produced this way will be averaged and the signals of the sub-bands will be weighted using the averages, and finally the weighted signals will be summed up and the cleaned signal will be determined this way.
HU0003010A 2000-07-31 2000-07-31 Signal purification method for the discrimination of a signal from background noise HUP0003010A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
HU0003010A HUP0003010A2 (en) 2000-07-31 2000-07-31 Signal purification method for the discrimination of a signal from background noise
PCT/EP2001/008827 WO2002011125A1 (en) 2000-07-31 2001-07-31 Attenuation of background noise and echoes in audio signal
AU2001282047A AU2001282047A1 (en) 2000-07-31 2001-07-31 Attenuation of background noise and echoes in audio signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU0003010A HUP0003010A2 (en) 2000-07-31 2000-07-31 Signal purification method for the discrimination of a signal from background noise

Publications (2)

Publication Number Publication Date
HU0003010D0 true HU0003010D0 (en) 2000-10-28
HUP0003010A2 HUP0003010A2 (en) 2002-08-28

Family

ID=89978510

Family Applications (1)

Application Number Title Priority Date Filing Date
HU0003010A HUP0003010A2 (en) 2000-07-31 2000-07-31 Signal purification method for the discrimination of a signal from background noise

Country Status (3)

Country Link
AU (1) AU2001282047A1 (en)
HU (1) HUP0003010A2 (en)
WO (1) WO2002011125A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112007003674T5 (en) * 2007-10-02 2010-08-12 Akg Acoustics Gmbh Method and apparatus for single-channel speech enhancement based on a latency-reduced auditory model
CN111145770B (en) * 2018-11-02 2022-11-22 北京微播视界科技有限公司 Audio processing method and device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07261797A (en) * 1994-03-18 1995-10-13 Mitsubishi Electric Corp Signal encoding device and signal decoding device
US5574824A (en) * 1994-04-11 1996-11-12 The United States Of America As Represented By The Secretary Of The Air Force Analysis/synthesis-based microphone array speech enhancer with variable signal distortion
US5933495A (en) * 1997-02-07 1999-08-03 Texas Instruments Incorporated Subband acoustic noise suppression
DK1141948T3 (en) * 1999-01-07 2007-08-13 Tellabs Operations Inc Method and apparatus for adaptive noise suppression

Also Published As

Publication number Publication date
WO2002011125A1 (en) 2002-02-07
HUP0003010A2 (en) 2002-08-28
AU2001282047A1 (en) 2002-02-13

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