JPH0475484U - - Google Patents
Info
- Publication number
- JPH0475484U JPH0475484U JP11961590U JP11961590U JPH0475484U JP H0475484 U JPH0475484 U JP H0475484U JP 11961590 U JP11961590 U JP 11961590U JP 11961590 U JP11961590 U JP 11961590U JP H0475484 U JPH0475484 U JP H0475484U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- copy guard
- pulse width
- synchronization
- 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
- 239000002131 composite material Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Television Signal Processing For Recording (AREA)
Description
第１図はこの考案の一実施例によるコピーガー
ド信号除去回路を示す図、第２図、第３図はこの
考案の一実施例による各回路部の信号波形図、第
４図は従来のコピーガード信号除去回路を示す回
路図、第５図は、従来のコピーガード信号除去回
路の各回路部の信号波形図である。
図において、１はコンポジツト信号入力端子、
２はペデスタルクランプ回路、３は同期分離回路
、４は遅延回路、５はパルス幅可変回路、６はＡ
ＮＤゲート、７はビデオ切換スイツチ、８は増幅
器、９はコンポジツト信号出力端子、１０はコピ
ーガード信号付コンポジツト信号波形であり、１
１は同期分離後の垂直同期信号波形、１２は同期
分離後の水平同期信号波形、１３は遅延後の垂直
同期信号波形、１４は遅延後の水平同期信号、１
５はパルス幅可変後の垂直同期信号波形、１６は
パルス幅可変後の水平同期信号波形、１７はコピ
ーガード信号抜き取りタイミング波形、１８はコ
ピーガード信号抜き取り後のコンポジツト信号波
形である。なお、図中、同一符号は同一、または
相当部分を示す。
Fig. 1 is a diagram showing a copy guard signal removal circuit according to an embodiment of this invention, Figs. 2 and 3 are signal waveform diagrams of each circuit section according to an embodiment of this invention, and Fig. 4 is a diagram showing a copy guard signal removal circuit according to an embodiment of this invention. FIG. 5, a circuit diagram showing a guard signal removal circuit, is a signal waveform diagram of each circuit section of a conventional copy guard signal removal circuit. In the figure, 1 is a composite signal input terminal,
2 is a pedestal clamp circuit, 3 is a synchronous separation circuit, 4 is a delay circuit, 5 is a variable pulse width circuit, 6 is A
ND gate, 7 is a video changeover switch, 8 is an amplifier, 9 is a composite signal output terminal, 10 is a composite signal waveform with copy guard signal, 1
1 is the vertical sync signal waveform after sync separation, 12 is the horizontal sync signal waveform after sync separation, 13 is the vertical sync signal waveform after delay, 14 is the horizontal sync signal after delay, 1
5 is a vertical synchronizing signal waveform after varying the pulse width, 16 is a horizontal synchronizing signal waveform after varying the pulse width, 17 is a copy guard signal extraction timing waveform, and 18 is a composite signal waveform after copy guard signal is extracted. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
を分離する回路を備え、分離した同期信号のパル
ス幅を可変できる回路と、同期信号の位相を可変
できる回路及びビデオ信号切換スイツチを備え、
分離した同期信号のパルス幅と位相を可変し、そ
の信号でビデオ信号切換スイツチを動作させて、
コピーガード信号を除去することを特徴とするコ
ピーガード信号除去回路。 In a composite signal, it is equipped with a circuit that separates synchronization from the signal, a circuit that can vary the pulse width of the separated synchronization signal, a circuit that can vary the phase of the synchronization signal, and a video signal changeover switch,
By varying the pulse width and phase of the separated synchronization signal and operating the video signal selection switch with that signal,
A copy guard signal removal circuit characterized by removing a copy guard signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11961590U JPH0475484U (en) | 1990-11-14 | 1990-11-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11961590U JPH0475484U (en) | 1990-11-14 | 1990-11-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0475484U true JPH0475484U (en) | 1992-07-01 |
Family
ID=31867560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11961590U Pending JPH0475484U (en) | 1990-11-14 | 1990-11-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0475484U (en) |
-
1990
- 1990-11-14 JP JP11961590U patent/JPH0475484U/ja active Pending
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