TW200501564A - Digital filter - Google Patents

Digital filter

Info

Publication number
TW200501564A
TW200501564A TW093105937A TW93105937A TW200501564A TW 200501564 A TW200501564 A TW 200501564A TW 093105937 A TW093105937 A TW 093105937A TW 93105937 A TW93105937 A TW 93105937A TW 200501564 A TW200501564 A TW 200501564A
Authority
TW
Taiwan
Prior art keywords
input data
moving average
calculation
perform
average calculation
Prior art date
Application number
TW093105937A
Other languages
Chinese (zh)
Inventor
Yukio Koyanagi
Original Assignee
Neuro Solution Corp
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 Neuro Solution Corp filed Critical Neuro Solution Corp
Publication of TW200501564A publication Critical patent/TW200501564A/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/06—Non-recursive filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0223—Computation saving measures; Accelerating measures

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Computing Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

The present invention provides a digital filter. An adder (13) is applied to perform addition or subtraction on the input data and the previous data before a delay is set according to the input data and a displacement calculator is applied to adjust the amplitude of the calculation result before a moving average calculation is output. In accordance with an m-multiplication frequency clock (m*ck) , time division multiplex is applied repeatedly for m times on multiplexing process parts (l-1, l-2,... l-n) for n-section vertical connections. Also, a simple moving average calculation is carried out repeatedly on the input data. By means of such structure, a finite impulse response (FIR) filter is formed. Thus, it is able to eliminate a multiplier conventionally required to perform any multiplication calculation for calculating the filter coefficient of each connector output of a delay line with connectors. At the same time, by applying time-division multiplex to perform moving average calculation for multiple times, it also can significantly reduce the number of times that the adder needs to be applied.
TW093105937A 2003-06-27 2004-03-05 Digital filter TW200501564A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003184862A JP2005020554A (en) 2003-06-27 2003-06-27 Digital filter

Publications (1)

Publication Number Publication Date
TW200501564A true TW200501564A (en) 2005-01-01

Family

ID=33549631

Family Applications (1)

Application Number Title Priority Date Filing Date
TW093105937A TW200501564A (en) 2003-06-27 2004-03-05 Digital filter

Country Status (3)

Country Link
JP (1) JP2005020554A (en)
TW (1) TW200501564A (en)
WO (1) WO2005002051A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7912884B2 (en) 2006-12-04 2011-03-22 Aloka Co., Ltd. Method and apparatus for implementing finite impulse response filters without the use of multipliers
JP2009250807A (en) * 2008-04-07 2009-10-29 Seiko Epson Corp Frequency measurement device and measurement method
US8510589B2 (en) * 2008-08-29 2013-08-13 Intel Mobile Communications GmbH Apparatus and method using first and second clocks
JP5517033B2 (en) * 2009-05-22 2014-06-11 セイコーエプソン株式会社 Frequency measuring device
JP6474246B2 (en) * 2014-12-09 2019-02-27 ローム株式会社 Audio signal processing circuit, in-vehicle audio device, audio component device, electronic equipment
CN113381730B (en) * 2021-05-19 2022-10-28 浙江传媒学院 Robustness self-adaptive filtering system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3316594B2 (en) * 1992-07-13 2002-08-19 富士通株式会社 Waveform equalizer
JPH0697773A (en) * 1992-09-16 1994-04-08 Matsushita Electric Ind Co Ltd Digital filter device
US6408318B1 (en) * 1999-04-05 2002-06-18 Xiaoling Fang Multiple stage decimation filter
JP2002368584A (en) * 2001-06-06 2002-12-20 Sony Corp Digital filter and digital video encoder using the same

Also Published As

Publication number Publication date
JP2005020554A (en) 2005-01-20
WO2005002051A1 (en) 2005-01-06

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