JPS6446264A - Noise reducing device - Google Patents
Noise reducing deviceInfo
- Publication number
- JPS6446264A JPS6446264A JP20286987A JP20286987A JPS6446264A JP S6446264 A JPS6446264 A JP S6446264A JP 20286987 A JP20286987 A JP 20286987A JP 20286987 A JP20286987 A JP 20286987A JP S6446264 A JPS6446264 A JP S6446264A
- Authority
- JP
- Japan
- Prior art keywords
- waveform
- noise
- noise waveform
- reproducing
- signal
- 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.)
- Pending
Links
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
PURPOSE:To effectively reduce noise by registering an expected noise waveform to a memory, obtaining the correlation between the waveform and a reproducing signal, subtracting the noise waveform when the correlation exists, and supplying the waveform and the signal to the signal reproducing system at rear stage as they are. CONSTITUTION:The noise waveform, which has a risk to be superimposed on the reproducing signal due to a flaw occurring in a recording medium, is registered beforehand to a noise waveform memory 12 composed of a ROM, etc., as a digital signal form. The correlation between a reproducing waveform and the noise waveform is calculated by reading the noise waveform and the reproducing signal respectively from the noise waveform memory 12 and a work RAM 13, repeating a processing to add the product of the both while gradually staggering the reading timing of one of them. When it is decided that the correlation exists, the reproducing signal and the noise waveform are read out again from the work RAM 13 and the noise waveform memory 12, the difference between both are prepared, and the difference is written into an output buffer 17. Thus, the noise can be effectively reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20286987A JPS6446264A (en) | 1987-08-14 | 1987-08-14 | Noise reducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20286987A JPS6446264A (en) | 1987-08-14 | 1987-08-14 | Noise reducing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6446264A true JPS6446264A (en) | 1989-02-20 |
Family
ID=16464542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20286987A Pending JPS6446264A (en) | 1987-08-14 | 1987-08-14 | Noise reducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6446264A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0352804U (en) * | 1989-09-25 | 1991-05-22 | ||
JP2010266831A (en) * | 2009-05-12 | 2010-11-25 | Futaba Yamada | Pocket magnifying glass |
-
1987
- 1987-08-14 JP JP20286987A patent/JPS6446264A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0352804U (en) * | 1989-09-25 | 1991-05-22 | ||
JP2010266831A (en) * | 2009-05-12 | 2010-11-25 | Futaba Yamada | Pocket magnifying glass |
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