JPH0197680U - - Google Patents
Info
- Publication number
- JPH0197680U JPH0197680U JP1987193365U JP19336587U JPH0197680U JP H0197680 U JPH0197680 U JP H0197680U JP 1987193365 U JP1987193365 U JP 1987193365U JP 19336587 U JP19336587 U JP 19336587U JP H0197680 U JPH0197680 U JP H0197680U
- Authority
- JP
- Japan
- Prior art keywords
- video input
- selection
- video
- input terminals
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案の一実施例のブロツク図である
。
１〜３…第１〜第３ビデオ入力端子、４〜６…
第１〜第３同期検出回路、７…選択制御回路、８
…選択回路。
FIG. 1 is a block diagram of one embodiment of the present invention. 1 to 3...1st to 3rd video input terminals, 4 to 6...
First to third synchronization detection circuits, 7... selection control circuit, 8
...selection circuit.
Claims (1)
力の同期信号の有無をそれぞれ検出する複数の同
期検出回路と、 前記同期検出回路からの各出力信号に基づいて
、ビデオモードへの切換時あるいはビデオモード
におけるビデオ入力端子の選択切換時には、同期
信号が有ると判別されたビデオ入力端子の内、予
め定めた優先順位に従つて優先順位の高いビデオ
入力端子からの入力を選択するための選択信号を
出力する選択制御回路と、 複数のビデオ入力端子の入力の内、前記選択信
号に対応するビデオ入力端子からの入力を選択出
力する選択回路とを備えることを特徴とするビデ
オ入力系統選択装置。[Claims for Utility Model Registration] A plurality of synchronization detection circuits that individually correspond to a plurality of video input terminals and detect the presence or absence of a synchronization signal of each input, based on each output signal from the synchronization detection circuit. , when switching to video mode or when switching the selection of video input terminals in video mode, among the video input terminals determined to have a synchronization signal, the video input terminals with the highest priority according to the predetermined priority order are selected. A selection control circuit that outputs a selection signal for selecting an input; and a selection circuit that selectively outputs an input from a video input terminal corresponding to the selection signal from among inputs of a plurality of video input terminals. Video input system selection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987193365U JPH0197680U (en) | 1987-12-18 | 1987-12-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987193365U JPH0197680U (en) | 1987-12-18 | 1987-12-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0197680U true JPH0197680U (en) | 1989-06-29 |
Family
ID=31484159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987193365U Pending JPH0197680U (en) | 1987-12-18 | 1987-12-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0197680U (en) |
-
1987
- 1987-12-18 JP JP1987193365U patent/JPH0197680U/ja active Pending
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