KR970004308A - Half Band Linear Phase Finite Impulse Response Filter - Google Patents

Half Band Linear Phase Finite Impulse Response Filter Download PDF

Info

Publication number
KR970004308A
KR970004308A KR1019950016762A KR19950016762A KR970004308A KR 970004308 A KR970004308 A KR 970004308A KR 1019950016762 A KR1019950016762 A KR 1019950016762A KR 19950016762 A KR19950016762 A KR 19950016762A KR 970004308 A KR970004308 A KR 970004308A
Authority
KR
South Korea
Prior art keywords
coefficient
data
output
storing
storage means
Prior art date
Application number
KR1019950016762A
Other languages
Korean (ko)
Other versions
KR100369337B1 (en
Inventor
이덕명
Original Assignee
김주용
현대전자산업 주식회사
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 김주용, 현대전자산업 주식회사 filed Critical 김주용
Priority to KR1019950016762A priority Critical patent/KR100369337B1/en
Publication of KR970004308A publication Critical patent/KR970004308A/en
Application granted granted Critical
Publication of KR100369337B1 publication Critical patent/KR100369337B1/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
    • H03H17/04—Recursive filters
    • H03H17/0416—Recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing
    • H03H17/0427—Recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing characterized by the ratio between the input-sampling and output-delivery frequencies
    • H03H17/0438—Recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing characterized by the ratio between the input-sampling and output-delivery frequencies the ratio being integer
    • H03H17/045—Recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing characterized by the ratio between the input-sampling and output-delivery frequencies the ratio being integer where the output-delivery frequency is lower than the input sampling frequency, i.e. decimation
    • 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
    • H03H17/0227—Measures concerning the coefficients
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H2017/0072—Theoretical filter design
    • H03H2017/0081—Theoretical filter design of FIR filters

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Computing Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

본 발명은 시그마-델타(∑-△) 모듈레이션(modulation) 방식을 채용한 멀티미디아(Multimedia) 오디오(Audio)용 ADC(Analog Dgital Converter)와 DAC(Dgital Analog Converter)에서 데시메이션(Decimation)과 인터플레이션(Interpolation)을 위한 FIR(Finite Impulse Response) 필터로, 특히 데이타 램(Data RAM)을 두개로 나눈 병렬구조로 구성하여 처리 속도를 향상시키도록 한 하프밴드(half band) 선형 위상 FIR 필터에 관한 것으로, 계수를 저장하는 계수 저장수단과, 입력되는 두개의 데이타 값과 계수 값을 연산하여 출력하는 연산수단을 구비하는 FIR 필터에 있어서, 두개의 입력 데이타가 각각 저장되는 제1 및 제2데이타 저장수단; 상기 제1 및 제2데이타 저장수단에 연결되어 하나의 계수에 대응되는 두 데이타의 쓰기 및 읽기 동작을 제어하는 제어신호 발생수단을 더 포함하는 것을 특징으로 하는 콘볼루션 싸이클 수를 반감시켜 탭수가 늘어나도 실시간 처리가 용이한 효과가 있다.The present invention relates to decimation and interworking in an analog digital converter (ADC) and digital analog converter (DAC) for sigma-delta (∑- △) modulation. Finite Impulse Response (FIR) filter for interpolation, especially for a half band linear phase FIR filter that improves the processing speed by configuring data RAM in two parallel structures. A FIR filter comprising coefficient storage means for storing coefficients, and a calculation means for calculating and outputting two input data values and coefficient values, wherein the first and second data storages each store two input data. Way; The number of taps is increased by halving the number of convolution cycles, further comprising control signal generating means connected to the first and second data storage means to control the writing and reading operations of two data corresponding to one coefficient. There is also an effect that the real-time processing is easy.

Description

하프밴드(half band) 선형 위상 FIR(Finite Impulse Response) 필터Half Band Linear Phase Finite Impulse Response Filter

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제4도는 본 발명에 따른 선형 위상 필터의 구성 블럭도.4 is a block diagram illustrating a configuration of a linear phase filter according to the present invention.

Claims (4)

계수를 저장하는 계수 저장수단과, 입력되는 두개의 데이타 값과 계수 값을 연산하여 출력하는 연산수단을 구비하는 FIR 필터에 있어서, 두개의 입력 데이타가 각각 저장되는 제1 및 제2데이타 저장수단; 상기 제1 및 제2데이타 저장수단에 연결되어 하나의 계수에 대응되는 두데이타의 쓰기 및 읽기 동작을 제어하는 제어신호 발생수단을 더 포함하는 것을 특징으로 하는 하프밴드(half band) 선형 위상 FIR(Finite Impulse Response) 필터.A FIR filter comprising coefficient storing means for storing coefficients, and calculating means for calculating and outputting two input data values and coefficient values, comprising: first and second data storing means for storing two input data, respectively; A half band linear phase FIR (connected to the first and second data storage means) for controlling a write and read operation of two data corresponding to one coefficient; Finite Impulse Response filter. 제1항에 있어서, 상기 제1 및 제2데이타 저장수단은, 각기 데이타를 저장하기 위한 하나의 데이타 램과 상기 데이타 램에 연결된 래치부를 구비하는 것을 특징으로 하는 하프밴드 선형 위상 FIR 필터.The half-band linear phase FIR filter according to claim 1, wherein the first and second data storage means each have a data RAM for storing data and a latch portion connected to the data RAM. 제1항에 있어서, 상기 계수 저장수단은, 입력되는 계수를 저장하는 계수 롬; 상기 계수 롬의 출력을 래치하는 래치부를 구비하는 것을 특징으로 하는 하프 밴드 선형 위상 FIR 필터.2. The apparatus of claim 1, wherein the coefficient storing means comprises: a coefficient ROM for storing an input coefficient; And a latch portion for latching the output of the coefficient ROM. 제1항에 있어서, 상기 연산수단은, 상기 제1데이타 저장수단의 래치부와 제2데이타 저장수단의 래치부의 출력을 덧셈하는 제1덧셈기; 상기 계수 저장수단 래치부의 출력과 제1덧셈기의 출력을 곱셈하는 곱셈기; 상기 곱셈기의 출력과 궤환된 전주기에서의 출력을 덧셈하는 제2덧셈기; 상기 제2덧셈기의 출력을 상기 제어수단의 제어에 따라 래치하여 출력하는 출력 래치부를 구비하는 것을 특징으로 하는 하프 밴드 선형 위상 FIR 필터.2. The apparatus of claim 1, wherein the computing means comprises: a first adder for adding outputs of the latch portion of the first data storage means and the latch portion of the second data storage means; A multiplier for multiplying the output of the coefficient storing means latch unit by the output of the first adder; A second adder for adding an output of the multiplier and an output of the feedback full period; And an output latch unit for latching and outputting the output of the second adder according to the control of the control means. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950016762A 1995-06-21 1995-06-21 Half band linear phase finite impulse response filter KR100369337B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950016762A KR100369337B1 (en) 1995-06-21 1995-06-21 Half band linear phase finite impulse response filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950016762A KR100369337B1 (en) 1995-06-21 1995-06-21 Half band linear phase finite impulse response filter

Publications (2)

Publication Number Publication Date
KR970004308A true KR970004308A (en) 1997-01-29
KR100369337B1 KR100369337B1 (en) 2003-03-31

Family

ID=37416353

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950016762A KR100369337B1 (en) 1995-06-21 1995-06-21 Half band linear phase finite impulse response filter

Country Status (1)

Country Link
KR (1) KR100369337B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101315891B1 (en) 2012-07-17 2013-10-14 숭실대학교산학협력단 Recursive half-band filter, and method for fitering using the filter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2591864B2 (en) * 1991-01-30 1997-03-19 日本電気アイシーマイコンシステム株式会社 Digital filter
JPH0541632A (en) * 1991-08-07 1993-02-19 Mitsubishi Electric Corp Fir digital filter device

Also Published As

Publication number Publication date
KR100369337B1 (en) 2003-03-31

Similar Documents

Publication Publication Date Title
Manolakis et al. Applied digital signal processing: theory and practice
Eldar et al. Filterbank reconstruction of bandlimited signals from nonuniform and generalized samples
US4843613A (en) Digitally implemented modulators
US6665338B1 (en) Circuitry for converting a sampled digital signal to a naturally sampled digital signal and method therefor
JP3194752B2 (en) PCM digital audio signal playback device
US6018754A (en) Apparatus for filtering a signal utilizing recursion and decimation
US5450083A (en) Two-stage decimation filter
DK150875B (en) RECURSIVE DIGITAL FILTER
JP2659608B2 (en) DA converter
JPH04116720A (en) Semiconductor device
US5841681A (en) Apparatus and method of filtering a signal utilizing recursion and decimation
KR970004308A (en) Half Band Linear Phase Finite Impulse Response Filter
US6515608B1 (en) Digital-analog converter and method, and data interpolation device and method
US5935199A (en) Dc accurate multi-rate digital filter with common coefficient set and dc gain correction
US6486813B1 (en) Oversampling circuit digital/analog converter
JPS61204700A (en) Sampling frequency converter
JPS6336576B2 (en)
US6894966B1 (en) Interpolation circuit
JP2002300007A (en) Sampling frequency converter
JP4397492B2 (en) Digital-analog converter
WO2001045266A1 (en) Digital/analog converter
White High-speed distributed-arithmetic realization of a second-order normal-form digital filter
JP2628506B2 (en) Digital filter
EP1209578B1 (en) Sampling function waveform data generating device
JPH02149011A (en) Sampling frequency converting device

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
LAPS Lapse due to unpaid annual fee