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SE9102333D0 - PROCEDURE AND DEVICE FOR DIGITAL FILTERING - Google Patents

PROCEDURE AND DEVICE FOR DIGITAL FILTERING

Info

Publication number
SE9102333D0
SE9102333D0 SE9102333A SE9102333A SE9102333D0 SE 9102333 D0 SE9102333 D0 SE 9102333D0 SE 9102333 A SE9102333 A SE 9102333A SE 9102333 A SE9102333 A SE 9102333A SE 9102333 D0 SE9102333 D0 SE 9102333D0
Authority
SE
Sweden
Prior art keywords
branches
filters
taps
procedure
convolutions
Prior art date
Application number
SE9102333A
Other languages
Swedish (sv)
Inventor
J Klokocka
Original Assignee
Jiri Klokocka
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 Jiri Klokocka filed Critical Jiri Klokocka
Priority to SE9102333A priority Critical patent/SE9102333D0/en
Publication of SE9102333D0 publication Critical patent/SE9102333D0/en
Priority to PCT/SE1992/000521 priority patent/WO1993004529A1/en

Links

Landscapes

  • Auxiliary Devices For Music (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Reverberation, Karaoke And Other Acoustics (AREA)

Abstract

A procedure for filtering an incoming signal, representing a sound, in order to achieve an intended modification to the character of the sound, comprises feeding the incoming signal to a number of parallel filter branches, convolution of the signal in the branches and mixing of the branches' output signals. During the procedure time discrete digital signals are used. The convolutions are executed with differing sampling frequencies for signals in the various branches. Those for convolution used taps are kept at a distance of one sampling period from each other, and the convolutions in all branches together are executed with minimum 5000 taps. A filter device for the realization of the procedure comprises a number of parallel connected part-filters of transversal type and a mixing device to mix the part-filters' output signals. The used taps of the part-filters are placed at a distance of one sampling period from each other. The part-filters together have at least 5000 taps and are arranged to work with differing sampling frequency.
SE9102333A 1991-08-12 1991-08-12 PROCEDURE AND DEVICE FOR DIGITAL FILTERING SE9102333D0 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9102333A SE9102333D0 (en) 1991-08-12 1991-08-12 PROCEDURE AND DEVICE FOR DIGITAL FILTERING
PCT/SE1992/000521 WO1993004529A1 (en) 1991-08-12 1992-07-17 A digital filtering method and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9102333A SE9102333D0 (en) 1991-08-12 1991-08-12 PROCEDURE AND DEVICE FOR DIGITAL FILTERING

Publications (1)

Publication Number Publication Date
SE9102333D0 true SE9102333D0 (en) 1991-08-12

Family

ID=20383449

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9102333A SE9102333D0 (en) 1991-08-12 1991-08-12 PROCEDURE AND DEVICE FOR DIGITAL FILTERING

Country Status (2)

Country Link
SE (1) SE9102333D0 (en)
WO (1) WO1993004529A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE516467C2 (en) * 2000-05-19 2002-01-15 Philipson Lars H G Method and apparatus for convolution
US9318094B2 (en) 2011-06-03 2016-04-19 Cirrus Logic, Inc. Adaptive noise canceling architecture for a personal audio device
US9824677B2 (en) 2011-06-03 2017-11-21 Cirrus Logic, Inc. Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC)
US8958571B2 (en) 2011-06-03 2015-02-17 Cirrus Logic, Inc. MIC covering detection in personal audio devices
US9123321B2 (en) 2012-05-10 2015-09-01 Cirrus Logic, Inc. Sequenced adaptation of anti-noise generator response and secondary path response in an adaptive noise canceling system
US9318090B2 (en) 2012-05-10 2016-04-19 Cirrus Logic, Inc. Downlink tone detection and adaptation of a secondary path response model in an adaptive noise canceling system
US9532139B1 (en) 2012-09-14 2016-12-27 Cirrus Logic, Inc. Dual-microphone frequency amplitude response self-calibration
US9414150B2 (en) 2013-03-14 2016-08-09 Cirrus Logic, Inc. Low-latency multi-driver adaptive noise canceling (ANC) system for a personal audio device
US9666176B2 (en) 2013-09-13 2017-05-30 Cirrus Logic, Inc. Systems and methods for adaptive noise cancellation by adaptively shaping internal white noise to train a secondary path
US10219071B2 (en) 2013-12-10 2019-02-26 Cirrus Logic, Inc. Systems and methods for bandlimiting anti-noise in personal audio devices having adaptive noise cancellation
US9704472B2 (en) 2013-12-10 2017-07-11 Cirrus Logic, Inc. Systems and methods for sharing secondary path information between audio channels in an adaptive noise cancellation system
US9478212B1 (en) 2014-09-03 2016-10-25 Cirrus Logic, Inc. Systems and methods for use of adaptive secondary path estimate to control equalization in an audio device
US20160365084A1 (en) * 2015-06-09 2016-12-15 Cirrus Logic International Semiconductor Ltd. Hybrid finite impulse response filter
US10026388B2 (en) 2015-08-20 2018-07-17 Cirrus Logic, Inc. Feedback adaptive noise cancellation (ANC) controller and method having a feedback response partially provided by a fixed-response filter
US10013966B2 (en) 2016-03-15 2018-07-03 Cirrus Logic, Inc. Systems and methods for adaptive active noise cancellation for multiple-driver personal audio device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5952911A (en) * 1982-09-20 1984-03-27 Nec Corp Transversal filter
US4888808A (en) * 1987-03-23 1989-12-19 Matsushita Electric Industrial Co., Ltd. Digital equalizer apparatus enabling separate phase and amplitude characteristic modification
JP2646210B2 (en) * 1987-05-27 1997-08-27 ヤマハ株式会社 Electroacoustic reverberation support device

Also Published As

Publication number Publication date
WO1993004529A1 (en) 1993-03-04

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