JPS5658119A - Reader for video format signal including pulse train information signal - Google Patents
Reader for video format signal including pulse train information signalInfo
- Publication number
- JPS5658119A JPS5658119A JP13463079A JP13463079A JPS5658119A JP S5658119 A JPS5658119 A JP S5658119A JP 13463079 A JP13463079 A JP 13463079A JP 13463079 A JP13463079 A JP 13463079A JP S5658119 A JPS5658119 A JP S5658119A
- Authority
- JP
- Japan
- Prior art keywords
- level
- fixed
- fixed level
- signal
- pedestal
- 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 For Digital Recording And Reproducing (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Digital Magnetic Recording (AREA)
Abstract
PURPOSE: To reduce the data reading error rate, by clamping the pedestal level of the video format signal at a fixed level and at the same time controlling the peak level of the pulse train signal nearly at a fixed level to use it for the comparison input of the comparison output stage.
CONSTITUTION: The pedestal level of the pedestal clamping circuit 2 is fixed at the fixed level VPD, and at the same time the output VC according to the difference between the data peak and the fixed level is generated at the differential amplifier 4. Thus the amplitude of the pulse signal is controlled at a fixed level by the voltage control amplifier VCA1, and accordingly the data peak VPK is set at a fixed level. As a result, both the levels VPD and VPK become constant, and thus the optimum reading is possible for the PCM data regardless of the waveform of the input signal by setting previously the comparison level VTH of the comparator 5 at a desired level.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13463079A JPS5658119A (en) | 1979-10-18 | 1979-10-18 | Reader for video format signal including pulse train information signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13463079A JPS5658119A (en) | 1979-10-18 | 1979-10-18 | Reader for video format signal including pulse train information signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5658119A true JPS5658119A (en) | 1981-05-21 |
Family
ID=15132857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13463079A Pending JPS5658119A (en) | 1979-10-18 | 1979-10-18 | Reader for video format signal including pulse train information signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5658119A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5483816A (en) * | 1977-12-16 | 1979-07-04 | Victor Co Of Japan Ltd | Digital signal generator |
-
1979
- 1979-10-18 JP JP13463079A patent/JPS5658119A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5483816A (en) * | 1977-12-16 | 1979-07-04 | Victor Co Of Japan Ltd | Digital signal generator |
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