WO1998047313A3 - Filterbank structure and method for filtering and separating an information signal into different bands, particularly for audio signals in hearing aids - Google Patents

Filterbank structure and method for filtering and separating an information signal into different bands, particularly for audio signals in hearing aids Download PDF

Info

Publication number
WO1998047313A3
WO1998047313A3 PCT/CA1998/000329 CA9800329W WO9847313A3 WO 1998047313 A3 WO1998047313 A3 WO 1998047313A3 CA 9800329 W CA9800329 W CA 9800329W WO 9847313 A3 WO9847313 A3 WO 9847313A3
Authority
WO
WIPO (PCT)
Prior art keywords
bands
filterbank
memory usage
provides
filtering
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.)
Ceased
Application number
PCT/CA1998/000329
Other languages
French (fr)
Other versions
WO1998047313A2 (en
Inventor
Robert Brennan
Anthony 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
Application filed by Dspfactory Ltd filed Critical Dspfactory Ltd
Priority to EP98914754A priority Critical patent/EP0985328B1/en
Priority to HK00103296.5A priority patent/HK1024814B/en
Priority to DE69833749T priority patent/DE69833749T2/en
Priority to CA002286051A priority patent/CA2286051C/en
Priority to JP54332898A priority patent/JP4267078B2/en
Priority to AU69153/98A priority patent/AU744008B2/en
Publication of WO1998047313A2 publication Critical patent/WO1998047313A2/en
Publication of WO1998047313A3 publication Critical patent/WO1998047313A3/en
Priority to NO19995009A priority patent/NO314609B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/505—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0248—Filters characterised by a particular frequency response or filtering method
    • H03H17/0264—Filter sets with mutual related characteristics
    • H03H17/0266—Filter banks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0294—Variable filters; Programmable filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/43—Signal processing in hearing aids to enhance the speech intelligibility
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/03—Aspects of the reduction of energy consumption in hearing devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/35—Electric hearing aids using translation techniques
    • H04R25/356—Amplitude, e.g. amplitude shift or compression
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/407—Circuits for combining signals of a plurality of transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Acoustics & Sound (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Networks Using Active Elements (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Stereophonic System (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

A filterbank structure is provided which provides a flexible compromise between the conflicting goals of processing delay, filter sharpness, memory usage and band interaction. The filterbank has an adjustable number of bands and a stacking which provides for a selectable shift of band frequencies to one of two discrete sets of center frequencies. The width of the bands and hence the number of the bands is selected depending upon acceptable delay, memory usage, and processing speed required. The flexibility in terms of stacking of the bands provides twice the number of potential band edge placements, which is advantageous for hearing loss fitting, especially at low frequencies. The same filter coefficients can be used for analysis and synthesis, to reduce memory usage.
PCT/CA1998/000329 1997-04-16 1998-04-16 Filterbank structure and method for filtering and separating an information signal into different bands, particularly for audio signals in hearing aids Ceased WO1998047313A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP98914754A EP0985328B1 (en) 1997-04-16 1998-04-16 Filterbank structure and method for filtering and separating an information signal into different bands, particularly for audio signals in hearing aids
HK00103296.5A HK1024814B (en) 1997-04-16 1998-04-16 Filterbank structure and method for filtering and separating an information signal into different bands, particularly for audio signals in hearing aids
DE69833749T DE69833749T2 (en) 1997-04-16 1998-04-16 FILTER BANK ARRANGEMENT AND METHOD FOR FILTRATION AND SEPARATION OF AN INFORMATION SIGNAL IN DIFFERENT FREQUENCY BANDS, ESPECIALLY FOR AUDIO SIGNALS IN HEARING AIDS
CA002286051A CA2286051C (en) 1997-04-16 1998-04-16 Filterbank structure and method for filtering and separating an information signal into different bands, particularly for audio signals in hearing aids
JP54332898A JP4267078B2 (en) 1997-04-16 1998-04-16 Filter bank structure and method for filtering information signals, especially for audio signals in hearing aids, into different bands
AU69153/98A AU744008B2 (en) 1997-04-16 1998-04-16 Filterbank structure and method for filtering and separating an information signal into different bands, particularly for audio signals in hearing aids
NO19995009A NO314609B1 (en) 1997-04-16 1999-10-14 Filter battery structure and method for filtering and separating an information signal in different bands, especially for audio signals from hearing aids

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US4199097P 1997-04-16 1997-04-16
US4197797P 1997-04-16 1997-04-16
US60/041,990 1997-04-16
US60/041,977 1997-04-16

Publications (2)

Publication Number Publication Date
WO1998047313A2 WO1998047313A2 (en) 1998-10-22
WO1998047313A3 true WO1998047313A3 (en) 1999-02-11

Family

ID=26718755

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1998/000329 Ceased WO1998047313A2 (en) 1997-04-16 1998-04-16 Filterbank structure and method for filtering and separating an information signal into different bands, particularly for audio signals in hearing aids

Country Status (9)

Country Link
EP (1) EP0985328B1 (en)
JP (1) JP4267078B2 (en)
AT (1) ATE320162T1 (en)
AU (1) AU744008B2 (en)
CA (1) CA2286051C (en)
DE (1) DE69833749T2 (en)
DK (1) DK0985328T3 (en)
NO (1) NO314609B1 (en)
WO (1) WO1998047313A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9350311B2 (en) 2004-10-26 2016-05-24 Dolby Laboratories Licensing Corporation Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal
US10615766B2 (en) 2017-12-13 2020-04-07 Oticon A/S Audio processing device, system, and method in which frequency bands of an input audio signal are bundled and allocated to channels for processing

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1252799B2 (en) 2000-01-20 2022-11-02 Starkey Laboratories, Inc. Method and apparatus for fitting hearing aids
DE60100453T2 (en) * 2000-01-25 2004-05-27 Widex A/S A METHOD AND SYSTEM FOR GENERATING A CALIBRATED SOUND FIELD
EP1191813A1 (en) * 2000-09-25 2002-03-27 TOPHOLM & WESTERMANN APS A hearing aid with an adaptive filter for suppression of acoustic feedback
EP2066139A3 (en) * 2000-09-25 2010-06-23 Widex A/S A hearing aid
EP1250027A1 (en) 2001-04-13 2002-10-16 Widex A/S Suspression of perceived occlusion
JP4681163B2 (en) * 2001-07-16 2011-05-11 パナソニック株式会社 Howling detection and suppression device, acoustic device including the same, and howling detection and suppression method
US7363334B2 (en) 2003-08-28 2008-04-22 Accoutic Processing Technology, Inc. Digital signal-processing structure and methodology featuring engine-instantiated, wave-digital-filter componentry, and fabrication thereof
CA2481631A1 (en) 2004-09-15 2006-03-15 Dspfactory Ltd. Method and system for physiological signal processing
EP1675431B1 (en) 2004-12-22 2015-11-18 Bernafon AG Hearing aid with frequency channels
EP1742509B1 (en) * 2005-07-08 2013-08-14 Oticon A/S A system and method for eliminating feedback and noise in a hearing device
US7676374B2 (en) 2006-03-28 2010-03-09 Nokia Corporation Low complexity subband-domain filtering in the case of cascaded filter banks
PL2002429T3 (en) * 2006-04-04 2013-03-29 Dolby Laboratories Licensing Corp Controlling a perceived loudness characteristic of an audio signal
DK1885156T3 (en) 2006-08-04 2013-07-29 Siemens Audiologische Technik Hearing aid with an audio signal generator
DE102008024490B4 (en) 2008-05-21 2011-09-22 Siemens Medical Instruments Pte. Ltd. Filter bank system for hearing aids
DE102008058496B4 (en) 2008-11-21 2010-09-09 Siemens Medical Instruments Pte. Ltd. Filter bank system with specific stop attenuation components for a hearing device
BR122015019030B1 (en) 2008-12-15 2020-05-05 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V audio encoder and bandwidth extension decoder
DE102010039589A1 (en) 2010-08-20 2012-02-23 Siemens Medical Instruments Pte. Ltd. Hearing aid and / or tinnitus therapy device
EP3122072B1 (en) 2011-03-24 2020-09-23 Oticon A/s Audio processing device, system, use and method
PL2904612T3 (en) 2012-10-05 2019-05-31 Fraunhofer Ges Forschung A device for coding speech signals using ACELP in the field of autocorrelation
AU2014220725B2 (en) 2013-02-20 2016-11-17 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus and method for encoding or decoding an audio signal using a transient-location dependent overlap
RU2665253C2 (en) 2013-06-21 2018-08-28 Фраунхофер-Гезелльшафт Цур Фердерунг Дер Ангевандтен Форшунг Е.Ф. Apparatus and method for improved concealment of adaptive codebook in acelp-like concealment employing improved pitch lag estimation
EP2980797A1 (en) 2014-07-28 2016-02-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio decoder, method and computer program using a zero-input-response to obtain a smooth transition
ES2975073T3 (en) 2014-03-31 2024-07-03 Fraunhofer Ges Forschung Encoder, decoder, encoding procedure, decoding procedure and program
EP2980793A1 (en) 2014-07-28 2016-02-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Encoder, decoder, system and methods for encoding and decoding
TWI602172B (en) 2014-08-27 2017-10-11 弗勞恩霍夫爾協會 Encoders, decoders, and methods for encoding and decoding audio content using parameters to enhance concealment
WO2020089757A1 (en) * 2018-11-02 2020-05-07 Cochlear Limited Multiple sound source encoding in hearing protheses
CN115902380B (en) * 2023-03-08 2023-06-16 保定天威新域科技发展有限公司 Ultra-wide band current intelligent sensor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002212A1 (en) * 1981-12-10 1983-06-23 Bisgaard, Peter, Nikolai Method and apparatus for adapting the transfer function in a hearing aid
US4508940A (en) * 1981-08-06 1985-04-02 Siemens Aktiengesellschaft Device for the compensation of hearing impairments
US4852175A (en) * 1988-02-03 1989-07-25 Siemens Hearing Instr Inc Hearing aid signal-processing system
SE462885B (en) * 1989-06-29 1990-09-10 Anders Sagren Programmable hearing-correction device
US5029217A (en) * 1986-01-21 1991-07-02 Harold Antin Digital hearing enhancement apparatus
WO1995008248A1 (en) * 1993-09-17 1995-03-23 Audiologic, Incorporated Noise reduction system for binaural hearing aid

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4508940A (en) * 1981-08-06 1985-04-02 Siemens Aktiengesellschaft Device for the compensation of hearing impairments
WO1983002212A1 (en) * 1981-12-10 1983-06-23 Bisgaard, Peter, Nikolai Method and apparatus for adapting the transfer function in a hearing aid
US5029217A (en) * 1986-01-21 1991-07-02 Harold Antin Digital hearing enhancement apparatus
US4852175A (en) * 1988-02-03 1989-07-25 Siemens Hearing Instr Inc Hearing aid signal-processing system
SE462885B (en) * 1989-06-29 1990-09-10 Anders Sagren Programmable hearing-correction device
WO1995008248A1 (en) * 1993-09-17 1995-03-23 Audiologic, Incorporated Noise reduction system for binaural hearing aid

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JU-HONG LEE ET AL: "FILTER DESIGN FOR POLYPHASE FILTER BANKS WITH ARBITRARY NUMBER OF SUBBAND CHANNELS", PROCEEDINGS OF THE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, PORTLAND, MAY 8 - 11, 1989, vol. 3, no. SYMP. 22, 8 May 1989 (1989-05-08), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 1720 - 1723, XP000131394 *
LUNNER T ET AL: "A DIGITAL FILTERBANK HEARING AID DESIGN, IMPLEMENTATION AND EVALUATION", SPECTRAL ESTIMATION AUDIO AND ELECTROACOUSTICS, TORONTO, MAY 14 - 17, 1991, vol. 5, no. CONF. 16, 14 May 1991 (1991-05-14), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 3661 - 3664, XP000242759 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9350311B2 (en) 2004-10-26 2016-05-24 Dolby Laboratories Licensing Corporation Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal
US10615766B2 (en) 2017-12-13 2020-04-07 Oticon A/S Audio processing device, system, and method in which frequency bands of an input audio signal are bundled and allocated to channels for processing
US11264964B2 (en) 2017-12-13 2022-03-01 Oticon A/S Audio processing device, system, use and method in which one of a plurality of coding schemes for distributing pulses to an electrode array is selected based on characteristics of incoming sound
US12101071B2 (en) 2017-12-13 2024-09-24 Cochlear Limited Audio processing device, system, use and method in which one of a plurality of coding schemes for distributing pulses to an electrode array is selected based on characteristics of incoming sound

Also Published As

Publication number Publication date
CA2286051A1 (en) 1998-10-22
AU6915398A (en) 1998-11-11
WO1998047313A2 (en) 1998-10-22
HK1024814A1 (en) 2000-10-20
NO995009L (en) 1999-12-10
CA2286051C (en) 2003-03-11
JP2001519127A (en) 2001-10-16
DE69833749D1 (en) 2006-05-04
DE69833749T2 (en) 2006-08-17
DK0985328T3 (en) 2006-04-10
AU744008B2 (en) 2002-02-14
NO314609B1 (en) 2003-04-14
EP0985328B1 (en) 2006-03-08
NO995009D0 (en) 1999-10-14
EP0985328A2 (en) 2000-03-15
JP4267078B2 (en) 2009-05-27
ATE320162T1 (en) 2006-03-15

Similar Documents

Publication Publication Date Title
CA2286051A1 (en) Filterbank structure and method for filtering and separating an information signal into different bands, particularly for audio signals in hearing aids
EP1610588A3 (en) Audio signal processing
WO1997029586A3 (en) Image data noise filtering
EP0854660A3 (en) Sound processing circuit
WO2002013572A3 (en) Method and apparatus for filtering and compressing sound signals
CA2259256A1 (en) System and method for adaptive interference cancelling
EP0844735A3 (en) System and method for digital filtering
EP0830731A4 (en) Signal conditioning circuit for compressing audio signals
WO2000022880A3 (en) Apparatus and method for synthesizing pseudo-stereophonic outputs from a monophonic input
EP1267591A3 (en) Sound signal playback machine and method thereof
WO1995016322A3 (en) Noise reduction
CA2286269A1 (en) Apparatus for and method of programming a digital hearing aid
EP1175125A3 (en) Adaptive gain and filtering circuit for a sound reproduction system
EP0381498A3 (en) Array microphone
EP0762804A3 (en) Three-dimensional acoustic processor which uses linear predictive coefficients
AU3722297A (en) Method and apparatus for improving effective signal to noise ratios in hearing aids and other communication systems used in noisy environments without loss of spectral information
IL112386A0 (en) Device for the suppression of snoring
EP0806864A3 (en) Image processing systems
AU2002327014A1 (en) Efficient methods for filtering to avoid inter-symbol interference and processing digital signals having large frequency guard bands
AU1022895A (en) Signal combining circuit, signal processing circuit including the signal combining circuit, stereophonic audio reproduction system including the signal processing circuit,and an audio-visual reproduction system including the stereophonic audio reproduction system
AU2956289A (en) Hearing aid signal-processing system
WO1996002105A3 (en) Method and apparatus for optimal ntsc rejection filtering and transmitter and receiver comprising same
WO2002037675A8 (en) Filtering method and filter
CA2173712A1 (en) Integrated MPEG Audio Decoder and Signal Processor
CA2214869A1 (en) Digital signal processing apparatus for frequency demultiplexing or multiplexing

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM GW HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US US UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
AK Designated states

Kind code of ref document: A3

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM GW HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US US UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
ENP Entry into the national phase

Ref document number: 2286051

Country of ref document: CA

Kind code of ref document: A

Ref document number: 2286051

ENP Entry into the national phase

Ref document number: 1998 543328

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 69153/98

Country of ref document: AU

WWE Wipo information: entry into national phase

Ref document number: 1998914754

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWP Wipo information: published in national office

Ref document number: 1998914754

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 69153/98

Country of ref document: AU

WWG Wipo information: grant in national office

Ref document number: 1998914754

Country of ref document: EP