JPS6481518A - Eliminating device for periodic noise - Google Patents
Eliminating device for periodic noiseInfo
- 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
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.
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)
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 |
-
1987
- 1987-09-24 JP JP62239682A patent/JP2565235B2/en not_active Expired - Fee Related
Cited By (3)
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 |