JPS6486790A - Luminance signal/chrominance signal separation circuit - Google Patents
Luminance signal/chrominance signal separation circuitInfo
- Publication number
- JPS6486790A JPS6486790A JP24545887A JP24545887A JPS6486790A JP S6486790 A JPS6486790 A JP S6486790A JP 24545887 A JP24545887 A JP 24545887A JP 24545887 A JP24545887 A JP 24545887A JP S6486790 A JPS6486790 A JP S6486790A
- Authority
- JP
- Japan
- Prior art keywords
- vertical
- correlation
- signal
- vertical correlation
- strong
- 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
Abstract
PURPOSE:To obtain a high Y/C separation performance by constituting a circuit in such a way that a vertical high-pass component with strong vertical correlation is selected as the spare signal of a chromaticity signal and the vertical high-pass component is selected as the chromaticity signal as it is when the vertical correlation is strong and horizontal correlation is weak. CONSTITUTION:A vertical correlation decision circuit 19 decides the sizes of the vertical correlation between first and second video signals S1 and S2 and the vertical correlation between the first and third video signals S1 and S3 according to the vertical high-pass components S4 and S5, and a multiplexer 13 selects the vertical highpass components obtained from two video signals with large vertical correlation. A horizontal and vertical correlation decision circuit 20 decides whether or not the video signal S1 includes weak horizontal correlation and adversely, strong vertical correlation according to the video signals S1-S3 and a decision signal S6, and a multiplexer 15 selects the selection output of the multiplexer 13 as it is in case where the video signal S1 includes the weak horizontal correlation and the strong vertical correlation, and selects the band-limited output of a band-pass filter 14 in case where the signal S1 includes no such components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24545887A JPS6486790A (en) | 1987-09-29 | 1987-09-29 | Luminance signal/chrominance signal separation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24545887A JPS6486790A (en) | 1987-09-29 | 1987-09-29 | Luminance signal/chrominance signal separation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6486790A true JPS6486790A (en) | 1989-03-31 |
Family
ID=17133962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24545887A Pending JPS6486790A (en) | 1987-09-29 | 1987-09-29 | Luminance signal/chrominance signal separation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6486790A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01108891A (en) * | 1987-10-21 | 1989-04-26 | Victor Co Of Japan Ltd | Video signal processing circuit |
| EP0415399A2 (en) * | 1989-08-30 | 1991-03-06 | Kabushiki Kaisha Toshiba | Luminance/chrominance separation circuit |
| JPH03208493A (en) * | 1990-01-11 | 1991-09-11 | Matsushita Electric Ind Co Ltd | Luminance signal/chrominance signal separation device |
-
1987
- 1987-09-29 JP JP24545887A patent/JPS6486790A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01108891A (en) * | 1987-10-21 | 1989-04-26 | Victor Co Of Japan Ltd | Video signal processing circuit |
| EP0415399A2 (en) * | 1989-08-30 | 1991-03-06 | Kabushiki Kaisha Toshiba | Luminance/chrominance separation circuit |
| JPH03208493A (en) * | 1990-01-11 | 1991-09-11 | Matsushita Electric Ind Co Ltd | Luminance signal/chrominance signal separation device |
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