JPS6446396A - Scramble circuit for chrominance sub-carrier signal - Google Patents
Scramble circuit for chrominance sub-carrier signalInfo
- Publication number
- JPS6446396A JPS6446396A JP62202737A JP20273787A JPS6446396A JP S6446396 A JPS6446396 A JP S6446396A JP 62202737 A JP62202737 A JP 62202737A JP 20273787 A JP20273787 A JP 20273787A JP S6446396 A JPS6446396 A JP S6446396A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- scramble
- burst signal
- horizontal synchronizing
- 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 simplify circuit constitution by generating the scramble burst signal of an always constant phase from a horizontal synchronizing signal by means of a scramble burst signal generating circuit and adding the scramble burst signal to a video signal, from which a color burst signal is removed, by means of a scramble burst signal inserting circuit. CONSTITUTION:The inputted video signal is branched into two video signals. One video signal is inputted to a horizontal synchronizing signal detecting circuit 1 and the horizontal synchronizing signal is separated. A color burst signal removing circuit 2 removes only the color burst signal of the other video signal, which is one of the branched two video signals, with obtaining the horizontal synchronizing signal from the detecting circuit 1 as a clock signal. A scramble burst signal generating circuit 3 always generates the same burst signal, with obtaining the horizontal synchronizing signal from the detecting circuit 1 as the clock signal, after a constant time from the rising of this clock signal. Then, this burst signal is added to the video signal, from which the color burst signal is removed, in a scramble burst signal inserting circuit 4. Thus, the circuit constitution can be simplified.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62202737A JPS6446396A (en) | 1987-08-14 | 1987-08-14 | Scramble circuit for chrominance sub-carrier signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62202737A JPS6446396A (en) | 1987-08-14 | 1987-08-14 | Scramble circuit for chrominance sub-carrier signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6446396A true JPS6446396A (en) | 1989-02-20 |
Family
ID=16462329
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62202737A Pending JPS6446396A (en) | 1987-08-14 | 1987-08-14 | Scramble circuit for chrominance sub-carrier signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6446396A (en) |
-
1987
- 1987-08-14 JP JP62202737A patent/JPS6446396A/en active Pending
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