CA2354858A1 - Subband directional audio signal processing using an oversampled filterbank - Google Patents

Subband directional audio signal processing using an oversampled filterbank Download PDF

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Publication number
CA2354858A1
CA2354858A1 CA002354858A CA2354858A CA2354858A1 CA 2354858 A1 CA2354858 A1 CA 2354858A1 CA 002354858 A CA002354858 A CA 002354858A CA 2354858 A CA2354858 A CA 2354858A CA 2354858 A1 CA2354858 A1 CA 2354858A1
Authority
CA
Canada
Prior art keywords
signal processing
audio signal
directional audio
filterbank
subband directional
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
CA002354858A
Other languages
French (fr)
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.)
Dspfactory 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4169688&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2354858(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Dspfactory Ltd filed Critical Dspfactory Ltd
Priority to CA002354858A priority Critical patent/CA2354858A1/en
Priority to CNB028194845A priority patent/CN100534221C/en
Priority to DK02757993.7T priority patent/DK1423988T4/en
Priority to CA002594362A priority patent/CA2594362C/en
Priority to AU2002325101A priority patent/AU2002325101B2/en
Priority to EP02757993.7A priority patent/EP1423988B2/en
Priority to US10/214,350 priority patent/US7359520B2/en
Priority to AT02757993T priority patent/ATE496496T1/en
Priority to CA002397009A priority patent/CA2397009C/en
Priority to JP2003520238A priority patent/JP4612302B2/en
Priority to DE60238996T priority patent/DE60238996D1/en
Priority to PCT/CA2002/001220 priority patent/WO2003015464A2/en
Publication of CA2354858A1 publication Critical patent/CA2354858A1/en
Priority to US12/013,818 priority patent/US20080112574A1/en
Priority to JP2008120269A priority patent/JP4732483B2/en
Abandoned legal-status Critical Current

Links

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 subband directional audio signal processing system is disclosed. The system uses an adaptive beamforming and fixed beamforming, and comprises an analysis filterbank and a synthesis filterbank.

Claims (3)

1. A possibly oversampled subband directional audio signal processing system using adaptive beamforming and fixed beamforming techniques, and comprising multiple analysis filterbanks (one per microphone) and a synthesis filterbank and means to adjust and combine analysis filterbank results to achieve a desired beam pattern
2. A system according to claim 1, wherein the combining means uses an adaptation process operating on a set of B fixed beams rather than the microphone outputs
3. A system according to claim 1, wherein the combining means weights the microphone outputs directly.
CA002354858A 2001-08-08 2001-08-08 Subband directional audio signal processing using an oversampled filterbank Abandoned CA2354858A1 (en)

Priority Applications (14)

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
PCT/CA2002/001220 WO2003015464A2 (en) 2001-08-08 2002-08-07 Directional audio signal processing using an oversampled filterbank
US10/214,350 US7359520B2 (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
CA002594362A CA2594362C (en) 2001-08-08 2002-08-07 Directional audio signal processing using an oversampled filterbank
AU2002325101A AU2002325101B2 (en) 2001-08-08 2002-08-07 Directional audio signal processing using an oversampled filterbank
EP02757993.7A EP1423988B2 (en) 2001-08-08 2002-08-07 Directional audio signal processing using an oversampled filterbank
CNB028194845A CN100534221C (en) 2001-08-08 2002-08-07 Directional audio signal processing using an oversampled filterbank
AT02757993T ATE496496T1 (en) 2001-08-08 2002-08-07 DIRECTIONAL AUDIO SIGNAL PROCESSING USING AN OVERSAMPLED FILTER BANK
DK02757993.7T DK1423988T4 (en) 2001-08-08 2002-08-07 Directional audio signal processing using an oversampled filterbank
JP2003520238A JP4612302B2 (en) 2001-08-08 2002-08-07 Directional audio signal processing using oversampled filter banks
DE60238996T DE60238996D1 (en) 2001-08-08 2002-08-07 DIRECTIONAL AUDIO SIGNAL PROCESSING USING A FABRICATED FILTER BANK
US12/013,818 US20080112574A1 (en) 2001-08-08 2008-01-14 Directional audio signal processing using an oversampled filterbank
JP2008120269A JP4732483B2 (en) 2001-08-08 2008-05-02 Directional audio signal processing using oversampled filter banks

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
CA2354858A1 true CA2354858A1 (en) 2003-02-08

Family

ID=4169688

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002354858A Abandoned CA2354858A1 (en) 2001-08-08 2001-08-08 Subband directional audio signal processing using an oversampled filterbank

Country Status (10)

Country Link
US (2) US7359520B2 (en)
EP (1) EP1423988B2 (en)
JP (2) JP4612302B2 (en)
CN (1) CN100534221C (en)
AT (1) ATE496496T1 (en)
AU (1) AU2002325101B2 (en)
CA (1) CA2354858A1 (en)
DE (1) DE60238996D1 (en)
DK (1) DK1423988T4 (en)
WO (1) WO2003015464A2 (en)

Cited By (3)

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CN110740412A (en) * 2018-07-18 2020-01-31 奥迪康有限公司 Hearing device comprising a speech presence probability estimator
CN113038349A (en) * 2021-02-26 2021-06-25 恒玄科技(上海)股份有限公司 Audio equipment

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