JPS5497314A - Waveform shaping system of ternary transmission - Google Patents
Waveform shaping system of ternary transmissionInfo
- Publication number
- JPS5497314A JPS5497314A JP458978A JP458978A JPS5497314A JP S5497314 A JPS5497314 A JP S5497314A JP 458978 A JP458978 A JP 458978A JP 458978 A JP458978 A JP 458978A JP S5497314 A JPS5497314 A JP S5497314A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- black
- length
- bits
- counter
- 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
Landscapes
- Manipulation Of Pulses (AREA)
- Dc Digital Transmission (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
PURPOSE: To reduce distortion occurring when transmitting a picture where positions on edge-scanning lines of black signals different in pulse length on adjacent scanning lines agree, on facsimile transmission attended with ternary conversion.
CONSTITUTION: A binary signal like a facsimile signal is inputted from terminal 21 and stored in shift register 23 by sampling clock 22. The output of register 23 is sent out to output terminal 24, supplied to black-signal counter 25, where the length of the black signal is counted, and supplied via inverter 26 to white-signal counter 27, where the length of the white signal is counted. Judging from the discrete value of counter 25, detection circuits 28, 29 and 31 detect isolated black signals of one bit, four bits and five bits in black signal length. Then, detection circuit 33 detects the edge of a long black signal at the time of present scanning and circuits 34, 35 and 36 detect isolated black signal outputs of one, four and five bits from circuits 28, 29 and 31.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53004589A JPS5941630B2 (en) | 1978-01-19 | 1978-01-19 | Waveform shaping method in three-level transmission |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53004589A JPS5941630B2 (en) | 1978-01-19 | 1978-01-19 | Waveform shaping method in three-level transmission |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5497314A true JPS5497314A (en) | 1979-08-01 |
JPS5941630B2 JPS5941630B2 (en) | 1984-10-08 |
Family
ID=11588217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53004589A Expired JPS5941630B2 (en) | 1978-01-19 | 1978-01-19 | Waveform shaping method in three-level transmission |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5941630B2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4832418A (en) * | 1971-08-31 | 1973-04-28 | ||
JPS5062511A (en) * | 1973-10-03 | 1975-05-28 |
-
1978
- 1978-01-19 JP JP53004589A patent/JPS5941630B2/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4832418A (en) * | 1971-08-31 | 1973-04-28 | ||
JPS5062511A (en) * | 1973-10-03 | 1975-05-28 |
Also Published As
Publication number | Publication date |
---|---|
JPS5941630B2 (en) | 1984-10-08 |
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