JPS566566A - Picture signal correcting circuit - Google Patents
Picture signal correcting circuitInfo
- Publication number
- JPS566566A JPS566566A JP8130979A JP8130979A JPS566566A JP S566566 A JPS566566 A JP S566566A JP 8130979 A JP8130979 A JP 8130979A JP 8130979 A JP8130979 A JP 8130979A JP S566566 A JPS566566 A JP S566566A
- Authority
- JP
- Japan
- Prior art keywords
- counter
- signal
- fluctuation
- contents
- controller
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
PURPOSE:To avoid the effect of the fluctuation of the scanning speed, by giving correction to the fluctuation of the input signal level which is caused by the fluctuation of one scanning time of the hand scanner. CONSTITUTION:Reference clock CP is supplied to counter 62 and controller 66. With supply of start pulse ST to controller 66, controller 66 produces the latch signal to make latch circuit 63 accept the contents of counter 62, and then clears the contents of counter 62 in the timing of the next clock CP. Counter 62 counts the next input of clock CP. The contents of circuit 63 is about the storage time and held until the start of the next scanning. Accordingly, the count number of circuit 63 is supplied to code converter 64 to generate the reciprocal signal which is reversely proportional to the count number. The reciprocal signal is converted into the analog reciprocal signal D/A converter 65 to be supplied to the other input terminal of analog multiplier 61. Thus for the output of multiplier 61, the corrected normal signal VON is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8130979A JPS566566A (en) | 1979-06-29 | 1979-06-29 | Picture signal correcting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8130979A JPS566566A (en) | 1979-06-29 | 1979-06-29 | Picture signal correcting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS566566A true JPS566566A (en) | 1981-01-23 |
Family
ID=13742790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8130979A Pending JPS566566A (en) | 1979-06-29 | 1979-06-29 | Picture signal correcting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS566566A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59106336A (en) * | 1982-12-09 | 1984-06-20 | Mitsubishi Electric Corp | Alarm device of unmanned transport vehicle |
| JPS62146063A (en) * | 1985-12-20 | 1987-06-30 | Minolta Camera Co Ltd | Picture reader |
| JPS6333057A (en) * | 1986-07-26 | 1988-02-12 | Mitsumi Electric Co Ltd | Picture information input device |
-
1979
- 1979-06-29 JP JP8130979A patent/JPS566566A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59106336A (en) * | 1982-12-09 | 1984-06-20 | Mitsubishi Electric Corp | Alarm device of unmanned transport vehicle |
| JPS62146063A (en) * | 1985-12-20 | 1987-06-30 | Minolta Camera Co Ltd | Picture reader |
| JPS6333057A (en) * | 1986-07-26 | 1988-02-12 | Mitsumi Electric Co Ltd | Picture information input device |
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