JPS5510248A - Addition circuit for picture signal for facsimile modulated signal - Google Patents
Addition circuit for picture signal for facsimile modulated signalInfo
- Publication number
- JPS5510248A JPS5510248A JP8292678A JP8292678A JPS5510248A JP S5510248 A JPS5510248 A JP S5510248A JP 8292678 A JP8292678 A JP 8292678A JP 8292678 A JP8292678 A JP 8292678A JP S5510248 A JPS5510248 A JP S5510248A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- facsimile
- amplitude
- picture
- phase
- 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
Abstract
PURPOSE: To prevent the deterioration of a picture signal caused by a base-band signal by adding a facsimile picture signal to a facsimile modulated signal by lowering the amplitude level of a facsimile modulated signal after amplitude or amplitude- phase modulation.
CONSTITUTION: A transmitted original picture set to facsimile equipment 1 is scanned and converted by the photoelectric converter into an electric signal, which is given a phase synchronizing signal indicating the start of each scan and converted into a base signal before being sent out from equipment 1 as a facsimile modulated signal after two-phase amplitude/phase modulation. This modulated signal is inputted to repeater 2 and phase synchronous detector 3 of repeater 2 extracts the phase synchronizing signal; and signal level suppressor 5 is controlled by the synchronizing signal and a control signal from controller 4 for the addition of a previously-generated facsimile picture signal, thereby suppressing the amplitude level. Then, the need for the conversion of the facsimile modulated signal into the base- band signal is eliminated and the deterioration of the picture signal due to the base-band signal conversion is prevented.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8292678A JPS5510248A (en) | 1978-07-10 | 1978-07-10 | Addition circuit for picture signal for facsimile modulated signal |
GB7921592A GB2026282B (en) | 1978-07-10 | 1979-06-21 | Signal superimposing apparatus |
CA000330357A CA1117645A (en) | 1978-07-10 | 1979-06-22 | Facsimile signal superposing system |
FR7917781A FR2433867A1 (en) | 1978-07-10 | 1979-07-09 | OVERLAY SYSTEM FOR FAC-SIMILE |
US06/056,287 US4255766A (en) | 1978-07-10 | 1979-07-10 | Facsimile signal superposing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8292678A JPS5510248A (en) | 1978-07-10 | 1978-07-10 | Addition circuit for picture signal for facsimile modulated signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5510248A true JPS5510248A (en) | 1980-01-24 |
Family
ID=13787833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8292678A Pending JPS5510248A (en) | 1978-07-10 | 1978-07-10 | Addition circuit for picture signal for facsimile modulated signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5510248A (en) |
-
1978
- 1978-07-10 JP JP8292678A patent/JPS5510248A/en active Pending
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