JPS5691590A - Picture quality regulating circuit - Google Patents
Picture quality regulating circuitInfo
- Publication number
- JPS5691590A JPS5691590A JP16977879A JP16977879A JPS5691590A JP S5691590 A JPS5691590 A JP S5691590A JP 16977879 A JP16977879 A JP 16977879A JP 16977879 A JP16977879 A JP 16977879A JP S5691590 A JPS5691590 A JP S5691590A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- white
- supplied
- profile
- circuit
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/20—Circuitry for controlling amplitude response
- H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
- H04N5/208—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Picture Signal Circuits (AREA)
Abstract
PURPOSE:To obtain an invariably picture of high quality by preventing a blooming state, by suppressing the white side compontents of a profile-corrected signal only when a transient signal in terms of the white side is supplied to CRT excessively. CONSTITUTION:A video signal applied to input terminal 21 is supplied to profile signal shaping circuit 22, which generates a profile-corrected signal. The profile- corrected signal is supplied to white peack signal suppressing circuit 24 suppresses white side high frequency components. The signal applied to input terminal 21, on the other hand, is further supplied to LPF25 to extract low frequency components and white-side high frequency components suppressed are mixed by synthesizing circuit 26. Circuit 24 utilizes the difference in impedance between points a7 and a8 due to the one-off operation of diode D21 to turn on-off according to the collector potential of transistor Q23. Its operation range is set when the signal level of input terminal 21 is high and the white-side transient signal is supplied to CRT excessively. This depends upon resistance values of resistances R33 and R34.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16977879A JPS5691590A (en) | 1979-12-26 | 1979-12-26 | Picture quality regulating circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16977879A JPS5691590A (en) | 1979-12-26 | 1979-12-26 | Picture quality regulating circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5691590A true JPS5691590A (en) | 1981-07-24 |
JPS6248947B2 JPS6248947B2 (en) | 1987-10-16 |
Family
ID=15892680
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16977879A Granted JPS5691590A (en) | 1979-12-26 | 1979-12-26 | Picture quality regulating circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5691590A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57109479A (en) * | 1980-12-26 | 1982-07-07 | Sony Corp | Picture quality adjusting circuit |
JPS5912678A (en) * | 1982-07-12 | 1984-01-23 | Sanyo Electric Co Ltd | Picture quality adjusting circuit |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5046034A (en) * | 1973-08-28 | 1975-04-24 | ||
JPS53102317U (en) * | 1977-01-21 | 1978-08-18 |
-
1979
- 1979-12-26 JP JP16977879A patent/JPS5691590A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5046034A (en) * | 1973-08-28 | 1975-04-24 | ||
JPS53102317U (en) * | 1977-01-21 | 1978-08-18 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57109479A (en) * | 1980-12-26 | 1982-07-07 | Sony Corp | Picture quality adjusting circuit |
JPH021428B2 (en) * | 1980-12-26 | 1990-01-11 | Sony Corp | |
JPS5912678A (en) * | 1982-07-12 | 1984-01-23 | Sanyo Electric Co Ltd | Picture quality adjusting circuit |
JPH023588B2 (en) * | 1982-07-12 | 1990-01-24 | Sanyo Electric Co |
Also Published As
Publication number | Publication date |
---|---|
JPS6248947B2 (en) | 1987-10-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS57109479A (en) | Picture quality adjusting circuit | |
JPS5691590A (en) | Picture quality regulating circuit | |
JPS5494827A (en) | Adjusting circuit for video quality | |
JPS5328332A (en) | Television set | |
JPS5326554A (en) | Tr ansistor circuit | |
JPS5437522A (en) | Camma correction circuit | |
JPS5690690A (en) | Automatic regulator of color television receiver | |
JPS5544238A (en) | Signal switching circuit | |
KR850001849Y1 (en) | Singnal matching circuit | |
ES480483A1 (en) | Video signal translating circuit | |
JPS5431214A (en) | Television receiver | |
JPS53124017A (en) | Gamma adjusting device | |
JPS57190487A (en) | Signal processing circuit of magnetic recording and reproducing device | |
JPS547824A (en) | Video amplifying circuit | |
JPS5387621A (en) | Outline emphasizing circuit | |
JPS5713862A (en) | Focus compensating circuit | |
FR2331226A1 (en) | Blending circuit for letters into SECAM colour TV signal - uses blanking of colour signal in region of letters with peripheral residue | |
JPS5247656A (en) | Display terminal device with keyboard | |
JPS6416078A (en) | Noise reduction circuit | |
DK428385A (en) | COUNTER-DEPENDENT REPLACEMENT VHF MIX CIRCUIT DEVICE | |
JPS57104381A (en) | Noise compression circuit | |
JPS5292429A (en) | Secam system chroma signal processing circuit | |
JPS5460825A (en) | Television picture receiver | |
JPS554102A (en) | Non-linear generating circuit | |
JPS5322318A (en) | Transmission unit of color television signal |