CA2397009A1 - Directional audio signal processing using an oversampled filterbank - Google Patents

Directional audio signal processing using an oversampled filterbank Download PDF

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Publication number
CA2397009A1
CA2397009A1 CA 2397009 CA2397009A CA2397009A1 CA 2397009 A1 CA2397009 A1 CA 2397009A1 CA 2397009 CA2397009 CA 2397009 CA 2397009 A CA2397009 A CA 2397009A CA 2397009 A1 CA2397009 A1 CA 2397009A1
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CA
Canada
Prior art keywords
filterbank
signal processing
audio signal
directional audio
signal processor
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 2397009
Other languages
French (fr)
Other versions
CA2397009C (en
Inventor
Robert L. Brennan
Edward Y. Chau
Hamid Sheikhzadeh Nadjar
Todd Schneider
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 CA002354858A external-priority patent/CA2354858A1/en
Application filed by Dspfactory Ltd filed Critical Dspfactory Ltd
Priority to CA002594362A priority Critical patent/CA2594362C/en
Priority to CA002397009A priority patent/CA2397009C/en
Publication of CA2397009A1 publication Critical patent/CA2397009A1/en
Application granted granted Critical
Publication of CA2397009C publication Critical patent/CA2397009C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/405—Arrangements for obtaining a desired directivity characteristic by combining a plurality of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/407—Circuits for combining signals of a plurality of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/505—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing
    • H04R25/507—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing implemented by neural network or fuzzy logic

Abstract

A directional signal processing system for beamforming information signals. The system includes an oversampled filterbank, which has an analysis filterbank for transforming the information signals in time domain into channel signals in transform domain, a synthesis filterbank and a signal processor. The signal processor processes the outputs of the analysis filterbank for beamforming the information signals. The synthesis filterbank transforms the outputs of the signal processor to a single information signal in time domain.
CA002397009A 2001-08-08 2002-08-07 Directional audio signal processing using an oversampled filterbank Expired - Lifetime CA2397009C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002594362A CA2594362C (en) 2001-08-08 2002-08-07 Directional audio signal processing using an oversampled filterbank
CA002397009A CA2397009C (en) 2001-08-08 2002-08-07 Directional audio signal processing using an oversampled filterbank

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA002354858A CA2354858A1 (en) 2001-08-08 2001-08-08 Subband directional audio signal processing using an oversampled filterbank
CA2,354,858 2001-08-08
CA002397009A CA2397009C (en) 2001-08-08 2002-08-07 Directional audio signal processing using an oversampled filterbank

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA002594362A Division CA2594362C (en) 2001-08-08 2002-08-07 Directional audio signal processing using an oversampled filterbank

Publications (2)

Publication Number Publication Date
CA2397009A1 true CA2397009A1 (en) 2003-02-08
CA2397009C CA2397009C (en) 2007-10-23

Family

ID=25682678

Family Applications (2)

Application Number Title Priority Date Filing Date
CA002397009A Expired - Lifetime CA2397009C (en) 2001-08-08 2002-08-07 Directional audio signal processing using an oversampled filterbank
CA002594362A Expired - Lifetime CA2594362C (en) 2001-08-08 2002-08-07 Directional audio signal processing using an oversampled filterbank

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA002594362A Expired - Lifetime CA2594362C (en) 2001-08-08 2002-08-07 Directional audio signal processing using an oversampled filterbank

Country Status (1)

Country Link
CA (2) CA2397009C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005029913A1 (en) * 2003-09-23 2005-03-31 Mcmaster University Binaural adaptive hearing system
EP3598777A3 (en) * 2018-07-18 2020-04-22 Oticon A/s A hearing device comprising a speech presence probability estimator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9947323B2 (en) * 2016-04-01 2018-04-17 Intel Corporation Synthetic oversampling to enhance speaker identification or verification

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005029913A1 (en) * 2003-09-23 2005-03-31 Mcmaster University Binaural adaptive hearing system
US7149320B2 (en) 2003-09-23 2006-12-12 Mcmaster University Binaural adaptive hearing aid
EP3598777A3 (en) * 2018-07-18 2020-04-22 Oticon A/s A hearing device comprising a speech presence probability estimator
US11102590B2 (en) 2018-07-18 2021-08-24 Oticon A/S Hearing device comprising a speech presence probability estimator
US11503414B2 (en) 2018-07-18 2022-11-15 Oticon A/S Hearing device comprising a speech presence probability estimator

Also Published As

Publication number Publication date
CA2594362C (en) 2009-12-15
CA2397009C (en) 2007-10-23
CA2594362A1 (en) 2003-02-08

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MKEX Expiry

Effective date: 20220808