JPS6446396A - Scramble circuit for chrominance sub-carrier signal - Google Patents

Scramble circuit for chrominance sub-carrier signal

Info

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
Application number
JP62202737A
Other languages
Japanese (ja)
Inventor
Akira Kaneko
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP62202737A priority Critical patent/JPS6446396A/en
Publication of JPS6446396A publication Critical patent/JPS6446396A/en
Pending legal-status Critical Current

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.
JP62202737A 1987-08-14 1987-08-14 Scramble circuit for chrominance sub-carrier signal Pending JPS6446396A (en)

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)

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