JPS6481518A - Eliminating device for periodic noise - Google Patents

Eliminating device for periodic noise

Info

Publication number
JPS6481518A
JPS6481518A JP23968287A JP23968287A JPS6481518A JP S6481518 A JPS6481518 A JP S6481518A JP 23968287 A JP23968287 A JP 23968287A JP 23968287 A JP23968287 A JP 23968287A JP S6481518 A JPS6481518 A JP S6481518A
Authority
JP
Japan
Prior art keywords
signal
digital
analog
converted
noise
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
JP23968287A
Other languages
Japanese (ja)
Other versions
JP2565235B2 (en
Inventor
Fumiaki Kato
Takamichi Mihashi
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP62239682A priority Critical patent/JP2565235B2/en
Publication of JPS6481518A publication Critical patent/JPS6481518A/en
Application granted granted Critical
Publication of JP2565235B2 publication Critical patent/JP2565235B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To eliminate a periodic noise by one-chip microcomputer by applying comb-line filter to a signal being the result of digital-converting an input signal, converting the signal into an analog signal and subtracting it from the input signal. CONSTITUTION:A reproduced sound signal Si is digital-converted for a period while noise is superimposed by an analog/digital conversion means 4. The signal subject to digital conversion is processed by a comb-line filter by an arithmetic means 6 and a noise component is extracted. The noise component is analog- converted by a digital/analog conversion means 7. The converted noise component N is subtracted from the reproduced sound signal Si by a subtraction circuit 8.
JP62239682A 1987-09-24 1987-09-24 Periodic noise eliminator Expired - Fee Related JP2565235B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62239682A JP2565235B2 (en) 1987-09-24 1987-09-24 Periodic noise eliminator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62239682A JP2565235B2 (en) 1987-09-24 1987-09-24 Periodic noise eliminator

Publications (2)

Publication Number Publication Date
JPS6481518A true JPS6481518A (en) 1989-03-27
JP2565235B2 JP2565235B2 (en) 1996-12-18

Family

ID=17048343

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62239682A Expired - Fee Related JP2565235B2 (en) 1987-09-24 1987-09-24 Periodic noise eliminator

Country Status (1)

Country Link
JP (1) JP2565235B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007071658A (en) * 2005-09-06 2007-03-22 Ishikawajima Shibaura Mach Co Ltd Moving object detection system
JP2010239240A (en) * 2009-03-30 2010-10-21 Rion Co Ltd Interdigital filter
US8036398B2 (en) 2005-05-27 2011-10-11 Sony Corporation Circuit and apparatus having a delay unit for reducing periodic noise

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8036398B2 (en) 2005-05-27 2011-10-11 Sony Corporation Circuit and apparatus having a delay unit for reducing periodic noise
JP2007071658A (en) * 2005-09-06 2007-03-22 Ishikawajima Shibaura Mach Co Ltd Moving object detection system
JP2010239240A (en) * 2009-03-30 2010-10-21 Rion Co Ltd Interdigital filter

Also Published As

Publication number Publication date
JP2565235B2 (en) 1996-12-18

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees