CA2437477A1 - Method and system for processing subband signals using adaptive filters - Google Patents

Method and system for processing subband signals using adaptive filters Download PDF

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Publication number
CA2437477A1
CA2437477A1 CA 2437477 CA2437477A CA2437477A1 CA 2437477 A1 CA2437477 A1 CA 2437477A1 CA 2437477 CA2437477 CA 2437477 CA 2437477 A CA2437477 A CA 2437477A CA 2437477 A1 CA2437477 A1 CA 2437477A1
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CA
Canada
Prior art keywords
adaptive
subband signals
oversampled
processing
adaptive filters
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.)
Granted
Application number
CA 2437477
Other languages
French (fr)
Other versions
CA2437477C (en
Inventor
Hamid Reza Abutalebi
Robert L. Brennan
Hamid Sheikhzadeh-Nadjar
Dequn Sun
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.)
On Semiconductor Trading Ltd
Original Assignee
Dspfactory Ltd
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
Priority claimed from CA002399159A external-priority patent/CA2399159A1/en
Application filed by Dspfactory Ltd filed Critical Dspfactory Ltd
Priority to CA002437477A priority Critical patent/CA2437477C/en
Publication of CA2437477A1 publication Critical patent/CA2437477A1/en
Application granted granted Critical
Publication of CA2437477C publication Critical patent/CA2437477C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H04B3/234—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using double talk detection
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • 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
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/18—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being spectral information of each sub-band
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • H03H21/0025—Particular filtering methods
    • H03H2021/0041—Subband decomposition

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

A method and system for processing subband signals using adaptive filters is provided. The system is implemented on an oversampled WOLA filterbank. Inputs signals are oversampled. The system includes an adaptive filter for each subband, and the functionality of improving the convergence properties of the adaptive filter. For example, the convergence property is improved by whitening the spectra of the oversampled subband signals and/or affine projection algorithm. The system is applicable to echo and/or noise cancellation. Adaptive step size control, adaptation process control using Double-Talk; detector may be implemented. The system may further implement a non-adaptive processing for reducing uncorrelated noise and/or cross-talk resistant adaptive noise cancellation.
CA002437477A 2002-08-16 2003-08-18 Method and system for processing subband signals using adaptive filters Expired - Fee Related CA2437477C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002437477A CA2437477C (en) 2002-08-16 2003-08-18 Method and system for processing subband signals using adaptive filters

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA002399159A CA2399159A1 (en) 2002-08-16 2002-08-16 Convergence improvement for oversampled subband adaptive filters
CA2,399,159 2002-08-16
CA002437477A CA2437477C (en) 2002-08-16 2003-08-18 Method and system for processing subband signals using adaptive filters

Publications (2)

Publication Number Publication Date
CA2437477A1 true CA2437477A1 (en) 2004-02-16
CA2437477C CA2437477C (en) 2008-11-18

Family

ID=31947282

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002437477A Expired - Fee Related CA2437477C (en) 2002-08-16 2003-08-18 Method and system for processing subband signals using adaptive filters

Country Status (1)

Country Link
CA (1) CA2437477C (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005050622A1 (en) * 2003-11-21 2005-06-02 Octasic Inc. Method and apparatus for reducing echo in a communication system
EP2262280A2 (en) 2003-03-31 2010-12-15 Emma Mixed Signal C.V. Method and system for acoustic shock protection
EP1638079A3 (en) * 2004-09-15 2017-02-22 Semiconductor Components Industries, LLC Method and system for active noise cancellation
CN111261182A (en) * 2020-05-07 2020-06-09 上海力声特医学科技有限公司 Wind noise suppression method and system suitable for cochlear implant
US10911096B1 (en) 2019-08-07 2021-02-02 Samsung Electronics Co., Ltd System and method for providing sub-band whitening in the presence of partial-band interference
CN116758891A (en) * 2023-07-13 2023-09-15 广州声博士声学技术有限公司 An active noise control method, system, equipment and medium
CN119811413A (en) * 2025-03-14 2025-04-11 青岛城市大脑投资开发股份有限公司 User dialogue interaction method and system based on deep learning
CN120185583A (en) * 2025-05-22 2025-06-20 成都必控科技有限责任公司 Adaptive signal filtering method and system based on multi-band fusion

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2782228A1 (en) 2011-07-06 2013-01-06 University Of New Brunswick Method and apparatus for noise cancellation in signals

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2262280A2 (en) 2003-03-31 2010-12-15 Emma Mixed Signal C.V. Method and system for acoustic shock protection
WO2005050622A1 (en) * 2003-11-21 2005-06-02 Octasic Inc. Method and apparatus for reducing echo in a communication system
US7231234B2 (en) 2003-11-21 2007-06-12 Octasic Inc. Method and apparatus for reducing echo in a communication system
EP1638079A3 (en) * 2004-09-15 2017-02-22 Semiconductor Components Industries, LLC Method and system for active noise cancellation
US10911096B1 (en) 2019-08-07 2021-02-02 Samsung Electronics Co., Ltd System and method for providing sub-band whitening in the presence of partial-band interference
US11323148B2 (en) 2019-08-07 2022-05-03 Samsung Electronics Co., Ltd System and method for providing sub-band whitening in the presence of partial-band interference
US11901933B2 (en) 2019-08-07 2024-02-13 Samsung Electronics Co., Ltd System and method for providing sub-band whitening in the presence of partial-band interference
CN111261182A (en) * 2020-05-07 2020-06-09 上海力声特医学科技有限公司 Wind noise suppression method and system suitable for cochlear implant
CN116758891A (en) * 2023-07-13 2023-09-15 广州声博士声学技术有限公司 An active noise control method, system, equipment and medium
CN119811413A (en) * 2025-03-14 2025-04-11 青岛城市大脑投资开发股份有限公司 User dialogue interaction method and system based on deep learning
CN119811413B (en) * 2025-03-14 2025-05-27 青岛城市大脑投资开发股份有限公司 User dialogue interaction method and system based on deep learning
CN120185583A (en) * 2025-05-22 2025-06-20 成都必控科技有限责任公司 Adaptive signal filtering method and system based on multi-band fusion

Also Published As

Publication number Publication date
CA2437477C (en) 2008-11-18

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Effective date: 20220301

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Effective date: 20200831