JPS5651116A - All pole type digital filter - Google Patents

All pole type digital filter

Info

Publication number
JPS5651116A
JPS5651116A JP12836679A JP12836679A JPS5651116A JP S5651116 A JPS5651116 A JP S5651116A JP 12836679 A JP12836679 A JP 12836679A JP 12836679 A JP12836679 A JP 12836679A JP S5651116 A JPS5651116 A JP S5651116A
Authority
JP
Japan
Prior art keywords
pole type
parameters
filter
digital filter
type digital
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.)
Granted
Application number
JP12836679A
Other languages
Japanese (ja)
Other versions
JPS6332288B2 (en
Inventor
Fumitada Itakura
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP12836679A priority Critical patent/JPS5651116A/en
Priority to GB8318893A priority patent/GB2131659B/en
Priority to GB8030747A priority patent/GB2059726B/en
Priority to SE8006850A priority patent/SE444730B/en
Priority to NL8005449A priority patent/NL189320C/en
Priority to DE19803037276 priority patent/DE3037276C2/en
Priority to FR8021110A priority patent/FR2466826A1/en
Priority to DE19803050742 priority patent/DE3050742C2/de
Publication of JPS5651116A publication Critical patent/JPS5651116A/en
Publication of JPS6332288B2 publication Critical patent/JPS6332288B2/ja
Granted legal-status Critical Current

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

Abstract

PURPOSE:To make quantization to a small number of bits and coding possible, by decomposing the denominator of the transfer function of an all pole type filter into two polynomials to realize a pair of trunk circuits and by controlling the filter characteristic by frequency region parameters. CONSTITUTION:Respective factors obtained by decomposing the denominator of transfer function H(Z) of an all pole type digital filter into quadratic functions Pp(Z) and Qp(Z) are constituted by the secondary filter sections 46, 47, 48 and 49, and these sections are connected in series respectively to constitute two trunk circuits, thus forming a feedback circuit. Therefore, omegai and thetai in variable regions 0-pi in the frequency region can be used as parameters, a good synthesized sound can be obtained even if quantization of parameters is 4 bits approximately.
JP12836679A 1979-10-03 1979-10-03 All pole type digital filter Granted JPS5651116A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP12836679A JPS5651116A (en) 1979-10-03 1979-10-03 All pole type digital filter
GB8318893A GB2131659B (en) 1979-10-03 1980-09-24 Sound synthesizer
GB8030747A GB2059726B (en) 1979-10-03 1980-09-24 Sound synthesizer
SE8006850A SE444730B (en) 1979-10-03 1980-10-01 LJUDSYNTETISATOR
NL8005449A NL189320C (en) 1979-10-03 1980-10-01 SYNTHESIS DEVICE FOR SOUND.
DE19803037276 DE3037276C2 (en) 1979-10-03 1980-10-02 Sound synthesizer
FR8021110A FR2466826A1 (en) 1979-10-03 1980-10-02 SYNTHESIZER OF SOUNDS
DE19803050742 DE3050742C2 (en) 1979-10-03 1980-10-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12836679A JPS5651116A (en) 1979-10-03 1979-10-03 All pole type digital filter

Publications (2)

Publication Number Publication Date
JPS5651116A true JPS5651116A (en) 1981-05-08
JPS6332288B2 JPS6332288B2 (en) 1988-06-29

Family

ID=14983037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12836679A Granted JPS5651116A (en) 1979-10-03 1979-10-03 All pole type digital filter

Country Status (1)

Country Link
JP (1) JPS5651116A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63276910A (en) * 1987-05-08 1988-11-15 Oki Electric Ind Co Ltd Constant delay filter

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07868Y2 (en) * 1988-09-12 1995-01-11 サンデン株式会社 Frozen / Refrigerated Showcase
JPH0452488A (en) * 1990-06-21 1992-02-20 Shiro Nakajima Transparent door member

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63276910A (en) * 1987-05-08 1988-11-15 Oki Electric Ind Co Ltd Constant delay filter

Also Published As

Publication number Publication date
JPS6332288B2 (en) 1988-06-29

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