JPS645190A - Video signal composing device - Google Patents
Video signal composing deviceInfo
- Publication number
- JPS645190A JPS645190A JP16034187A JP16034187A JPS645190A JP S645190 A JPS645190 A JP S645190A JP 16034187 A JP16034187 A JP 16034187A JP 16034187 A JP16034187 A JP 16034187A JP S645190 A JPS645190 A JP S645190A
- Authority
- JP
- Japan
- Prior art keywords
- image
- color
- subordinate
- 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
Landscapes
- Processing Of Color Television Signals (AREA)
Abstract
PURPOSE:To obtain a natural composite image by equalizing the color signal level of a main image to the color signal level of a subordinate image. CONSTITUTION:A color burst signal contained in the composite video signal of the main image and a color burst signal contained in the composite video signal constituting the subordinate image are fetched from 1st and 2nd burst gate circuit 36 and 37 and applied to a comparator 38 respectively. Here, the amplitude levels of the two kinds of the color burst signals are compared with each other and the comparison output is sent out to a VCA circuit 39. Then the VCA circuit 39 varies the gain according to the output of the comparator 38 and eqalizes the amplitude of the color burst signal of the subordinate image to the amplitude of the color burst signal of the main image. Consequently, there is no difference in color saturation between the main image and subordinate images of a composite image, which becomes natural.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16034187A JPS645190A (en) | 1987-06-26 | 1987-06-26 | Video signal composing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16034187A JPS645190A (en) | 1987-06-26 | 1987-06-26 | Video signal composing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS645190A true JPS645190A (en) | 1989-01-10 |
Family
ID=15712889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16034187A Pending JPS645190A (en) | 1987-06-26 | 1987-06-26 | Video signal composing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS645190A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0287885A (en) * | 1988-09-26 | 1990-03-28 | Nec Corp | Video signal circuit |
-
1987
- 1987-06-26 JP JP16034187A patent/JPS645190A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0287885A (en) * | 1988-09-26 | 1990-03-28 | Nec Corp | Video signal circuit |
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