JPS6432588A - Picture quality improving device for color television signal - Google Patents
Picture quality improving device for color television signalInfo
- Publication number
- JPS6432588A JPS6432588A JP18851787A JP18851787A JPS6432588A JP S6432588 A JPS6432588 A JP S6432588A JP 18851787 A JP18851787 A JP 18851787A JP 18851787 A JP18851787 A JP 18851787A JP S6432588 A JPS6432588 A JP S6432588A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- component
- high frequency
- circuit
- response
- 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 attain the detailed expression of high saturation part by separating a luminance component and a chrominance component from a color TV signal, detecting a correction quantity control signal from the chrominance component to compensate a high frequency band of the luminance component in response to the correction quantity control signal. CONSTITUTION:A color TV signal is separated into a Y signal and a C signal by a YC separation circuit 2, the C signal is full-wave-rectified by a detection circuit 7 and becomes a correction quantity control signal K in response to the chrominance component. On the other hand, the Y signal is a high frequency component through an HPF 9 and the high frequency component is amplified in response to the value of the signal K by a variable gain amplifier 10 and added and corrected by the adder circuit 11 with the Y signal via the delay circuit 8 and the resulting Y signal is obtained. The obtained Y signal and the C signal via the circuit 6 are added by an encoder and a composite signal having a luminance component emphasized with the high frequency component is outputted from the output terminal 4.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18851787A JPS6432588A (en) | 1987-07-28 | 1987-07-28 | Picture quality improving device for color television signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18851787A JPS6432588A (en) | 1987-07-28 | 1987-07-28 | Picture quality improving device for color television signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6432588A true JPS6432588A (en) | 1989-02-02 |
Family
ID=16225100
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18851787A Pending JPS6432588A (en) | 1987-07-28 | 1987-07-28 | Picture quality improving device for color television signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6432588A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5663769A (en) * | 1993-04-19 | 1997-09-02 | Mitsubishi Denki Kabushiki Kaisha | Image quality correction circuit based on color density |
JP2005269639A (en) * | 2004-03-16 | 2005-09-29 | Xerox Corp | Method and system for converting color image to gray scale image, gray scale image, method for improving conversion from color to gray scale, and edge emphasizing method |
-
1987
- 1987-07-28 JP JP18851787A patent/JPS6432588A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5663769A (en) * | 1993-04-19 | 1997-09-02 | Mitsubishi Denki Kabushiki Kaisha | Image quality correction circuit based on color density |
JP2005269639A (en) * | 2004-03-16 | 2005-09-29 | Xerox Corp | Method and system for converting color image to gray scale image, gray scale image, method for improving conversion from color to gray scale, and edge emphasizing method |
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