JPS56107675A - Video signal mixing circuit - Google Patents
Video signal mixing circuitInfo
- Publication number
- JPS56107675A JPS56107675A JP1066580A JP1066580A JPS56107675A JP S56107675 A JPS56107675 A JP S56107675A JP 1066580 A JP1066580 A JP 1066580A JP 1066580 A JP1066580 A JP 1066580A JP S56107675 A JPS56107675 A JP S56107675A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- synchronizing
- video
- camera
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/63—Control of cameras or camera modules by using electronic viewfinders
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Studio Circuits (AREA)
Abstract
PURPOSE:To prevent a synchronizing disturbance of the picture by mixing a signal which has removed a synchronizing signal from the video signal provided from the outside, with the video signal obtained from a TV camera, and providing it to the view finder circuit of TV camera. CONSTITUTION:A video signal S1 obtained from a TV camera is provided to the input terminal 1, and a video signal S2 inserted from another TV camera is provided to the input terminal 2. The signal S1 is added to not only the synchronization separating circuit 3 but also the mixing circuit 4. On the other hand, as for the signal S2, the synchronizing signal is removed from the synchronizing signal removing circuit 6, only the video part is added by the adder circuit 5 together with the output S3, and a signal S5 in which a video part of the signal S2 has been superposed on a synchronizing signal S3 of the signal S1 is obtained. This signal S5 and the signal S1 are compounded in the prescribed ratio by the mixing circuit 4. When this composite signal S6 is added to the view finder circuit, a composite picture having no synchronizing disturbance, in which a picture of subsignal has been overlapped on a part of the main picture is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1066580A JPS56107675A (en) | 1980-01-31 | 1980-01-31 | Video signal mixing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1066580A JPS56107675A (en) | 1980-01-31 | 1980-01-31 | Video signal mixing circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56107675A true JPS56107675A (en) | 1981-08-26 |
Family
ID=11756530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1066580A Pending JPS56107675A (en) | 1980-01-31 | 1980-01-31 | Video signal mixing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56107675A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS543424A (en) * | 1977-06-09 | 1979-01-11 | Shin Meiwa Ind Co Ltd | Tv video signal synthesizing circuit |
-
1980
- 1980-01-31 JP JP1066580A patent/JPS56107675A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS543424A (en) * | 1977-06-09 | 1979-01-11 | Shin Meiwa Ind Co Ltd | Tv video signal synthesizing circuit |
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