JPS55164981A - Read-in unit - Google Patents
Read-in unitInfo
- Publication number
- JPS55164981A JPS55164981A JP7063579A JP7063579A JPS55164981A JP S55164981 A JPS55164981 A JP S55164981A JP 7063579 A JP7063579 A JP 7063579A JP 7063579 A JP7063579 A JP 7063579A JP S55164981 A JPS55164981 A JP S55164981A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- level
- fed
- output
- 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
- Character Input (AREA)
- Image Input (AREA)
Abstract
PURPOSE: To enable to accurate read-in even if the level suddenly changes, by setting the reference value and pitch of the slice level through the reference of ground level detected.
CONSTITUTION: The video signal from the pick up unit 10 is fed to one input terminal of the comparison circuit 13 via the amplifier 12. On the other hand, the video output signal of the amplifier 12 is fed to the edge detection circuit 14 together with the line synchronizing signal of the driving circuit 11. The circuit 14 detects the background of the card to open the gate circuit 15 and lets the background pass through the rectifier circuit 16. The output of the circuit 16, that is, the level L0 showing the background part is fed to the multiplication type D/A converter 17, as the reference level. The output of the counter 18 producing the output having the number corresponding to the number of stages of desired slice level by receiving the control signal from the circuit 11 is fed to the converter 17. Since the value of each slice level is preset by taking the level L0 as the reference, it is sequentially produced according to the output of the counter 18 and fed to the circuit 13. Thus, according to the level variation of the video signal, the slice level is changed for accurate read-in.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7063579A JPS55164981A (en) | 1979-06-07 | 1979-06-07 | Read-in unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7063579A JPS55164981A (en) | 1979-06-07 | 1979-06-07 | Read-in unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55164981A true JPS55164981A (en) | 1980-12-23 |
Family
ID=13437290
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7063579A Pending JPS55164981A (en) | 1979-06-07 | 1979-06-07 | Read-in unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55164981A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5870379A (en) * | 1981-10-21 | 1983-04-26 | Oki Electric Ind Co Ltd | Optical picture reading method |
JPS5892070A (en) * | 1981-11-20 | 1983-06-01 | エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン | Dynamic regulator |
JPS58158774A (en) * | 1982-03-17 | 1983-09-21 | Oki Electric Ind Co Ltd | Reading method of bankbook printed data |
JPH02153480A (en) * | 1988-12-06 | 1990-06-13 | Tokyo Electron Ltd | Pattern recognizing device |
JPH0549710U (en) * | 1991-12-17 | 1993-06-29 | 新明和工業株式会社 | Garbage suction transport device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50126133A (en) * | 1974-03-23 | 1975-10-03 | ||
JPS5350610A (en) * | 1976-10-19 | 1978-05-09 | Sanyo Electric Co Ltd | Video signal processing circuit |
-
1979
- 1979-06-07 JP JP7063579A patent/JPS55164981A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50126133A (en) * | 1974-03-23 | 1975-10-03 | ||
JPS5350610A (en) * | 1976-10-19 | 1978-05-09 | Sanyo Electric Co Ltd | Video signal processing circuit |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5870379A (en) * | 1981-10-21 | 1983-04-26 | Oki Electric Ind Co Ltd | Optical picture reading method |
JPS6316789B2 (en) * | 1981-10-21 | 1988-04-11 | Oki Electric Ind Co Ltd | |
JPS5892070A (en) * | 1981-11-20 | 1983-06-01 | エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン | Dynamic regulator |
JPH0413748B2 (en) * | 1981-11-20 | 1992-03-10 | Fuiritsupusu Furuuiranpenfuaburiken Nv | |
JPS58158774A (en) * | 1982-03-17 | 1983-09-21 | Oki Electric Ind Co Ltd | Reading method of bankbook printed data |
JPH0324352B2 (en) * | 1982-03-17 | 1991-04-03 | Oki Electric Ind Co Ltd | |
JPH02153480A (en) * | 1988-12-06 | 1990-06-13 | Tokyo Electron Ltd | Pattern recognizing device |
JPH0549710U (en) * | 1991-12-17 | 1993-06-29 | 新明和工業株式会社 | Garbage suction transport device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5429919A (en) | Video signal processing circuit | |
JPS55164981A (en) | Read-in unit | |
JPS5547720A (en) | Channel selection unit | |
JPS5299723A (en) | Circuit for converting analogous signals to binary value signals | |
JPS5453923A (en) | Noise eliminating circuit | |
JPS552927A (en) | Automatic time correction device | |
JPS54102822A (en) | Azimuth-recording still-picture reproducer | |
JPS536080A (en) | Frequency detection circuit | |
JPS5437624A (en) | Phase calibration system of facsimile equipment | |
JPS5525279A (en) | Automatic frequency tuning defeat device | |
JPS5680921A (en) | Automatic tuning circuit | |
JPS53134320A (en) | Noise rejecting circuit | |
JPS5288010A (en) | Recording level setting apparatus for fm signal | |
JPS5678281A (en) | Signal processing circuit | |
JPS5627581A (en) | Signal processor | |
JPS5516523A (en) | Preset channel selector | |
JPS5377412A (en) | Noise eliminating circuit | |
JPS5455109A (en) | Controller for signal level | |
JPS5330857A (en) | Signal change detector circuit | |
JPS5644212A (en) | Agc circuit | |
JPS55114031A (en) | Detector for pulse absence | |
JPS6454822A (en) | Digital agc circuit | |
JPS5612550A (en) | Control device for peak process time | |
JPS54108524A (en) | Color synchronizer of beam index type picture receiver | |
JPS5767903A (en) | Output control method of focus detector |