JPS62173878U - - Google Patents
Info
- Publication number
- JPS62173878U JPS62173878U JP6138086U JP6138086U JPS62173878U JP S62173878 U JPS62173878 U JP S62173878U JP 6138086 U JP6138086 U JP 6138086U JP 6138086 U JP6138086 U JP 6138086U JP S62173878 U JPS62173878 U JP S62173878U
- Authority
- JP
- Japan
- Prior art keywords
- low
- pass filter
- filter
- video signal
- signal
- 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 4
- 238000000926 separation method Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Synchronizing For Television (AREA)
Description
第１図本願考案の実施例を示すブロツク図、第
２図はその動作を説明するための概略波形図、第
３図は複合映像信号のパターンを示す波形図、第
４図は従来の同期分離回路を説明するための波形
図である。
ａ……同期信号、ｂ……映像信号部分、Ａ……
同期分離回路、１……第１の低域濾波器、２……
第二の低域濾波器、３……比較器。
Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a schematic waveform diagram for explaining its operation, Fig. 3 is a waveform diagram showing the pattern of a composite video signal, and Fig. 4 is a conventional synchronous separation method. FIG. 3 is a waveform diagram for explaining a circuit. a...Synchronization signal, b...Video signal part, A...
Synchronous separation circuit, 1...first low-pass filter, 2...
Second low-pass filter, 3... comparator.
Claims (1)
けて、これを濾波する低域濾波器１を設け、この
濾波器１の出力波形を上記同期信号と比較させ、
あるいは上記複合信号を入力とする上記濾波器１
とは別異の遮断周波数を有する低域濾波器２を別
個に設けてこれの出力波形と上記低域濾波器１と
を比較させる等、複合映像信号を濾波する少なく
とも一個の低域濾波器によつて比較要素の一方を
形成したことを特徴とする同期分離回路。 A low-pass filter 1 is provided to receive and filter a composite video signal including a synchronization signal and a video signal, and the output waveform of the filter 1 is compared with the synchronization signal,
Alternatively, the filter 1 receives the composite signal as input.
At least one low-pass filter for filtering the composite video signal, such as separately providing a low-pass filter 2 having a cut-off frequency different from that of the low-pass filter 2 and comparing the output waveform of the low-pass filter 2 with the low-pass filter 1 described above. A synchronous separation circuit characterized in that it forms one of the comparison elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6138086U JPS62173878U (en) | 1986-04-23 | 1986-04-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6138086U JPS62173878U (en) | 1986-04-23 | 1986-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62173878U true JPS62173878U (en) | 1987-11-05 |
Family
ID=30894663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6138086U Pending JPS62173878U (en) | 1986-04-23 | 1986-04-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62173878U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5057326A (en) * | 1973-09-19 | 1975-05-19 |
-
1986
- 1986-04-23 JP JP6138086U patent/JPS62173878U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5057326A (en) * | 1973-09-19 | 1975-05-19 |
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