CA1026457A - Circuit correcteur d'ouverture - Google Patents
Circuit correcteur d'ouvertureInfo
- Publication number
- CA1026457A CA1026457A CA216,133A CA216133A CA1026457A CA 1026457 A CA1026457 A CA 1026457A CA 216133 A CA216133 A CA 216133A CA 1026457 A CA1026457 A CA 1026457A
- Authority
- CA
- Canada
- Prior art keywords
- correction circuit
- aperture correction
- aperture
- circuit
- correction
- 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.)
- Expired
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14164473A JPS5539948B2 (fr) | 1973-12-17 | 1973-12-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1026457A true CA1026457A (fr) | 1978-02-14 |
Family
ID=15296827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA216,133A Expired CA1026457A (fr) | 1973-12-17 | 1974-12-16 | Circuit correcteur d'ouverture |
Country Status (8)
Country | Link |
---|---|
US (1) | US3980813A (fr) |
JP (1) | JPS5539948B2 (fr) |
CA (1) | CA1026457A (fr) |
DE (1) | DE2459681C3 (fr) |
FR (1) | FR2254921B1 (fr) |
GB (1) | GB1482790A (fr) |
IT (1) | IT1027759B (fr) |
NL (1) | NL7416225A (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5131120A (fr) * | 1974-09-10 | 1976-03-17 | Japan Broadcasting Corp | |
US4091379A (en) * | 1976-05-03 | 1978-05-23 | Litton Business Systems, Inc. | Analog to digital wave shaping system |
WO1980000774A1 (fr) * | 1978-09-28 | 1980-04-17 | Eastman Kodak Co | Mise en valeur electronique d'une image |
DE2906649C2 (de) * | 1979-02-21 | 1981-02-19 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Schaltung zur Verbesserung der Bildschärfe in einem Fernsehempfänger |
US4463381A (en) * | 1980-04-16 | 1984-07-31 | Eastman Kodak Company | Image processing apparatus including a partitioned low pass channel |
US4446484A (en) * | 1981-04-16 | 1984-05-01 | Eastman Kodak Company | Image gradient detectors operating in a partitioned low-pass channel |
DE3521991A1 (de) * | 1985-06-20 | 1987-01-02 | Thomson Brandt Gmbh | Schaltung zur verbesserung der wiedergabe-bildschaerfe in einem videorecorder |
USRE34176E (en) * | 1986-10-20 | 1993-02-09 | North American Philips Corporation | Method and apparatus for improving the rise and fall time of a video signal |
US4758891A (en) * | 1986-10-20 | 1988-07-19 | North American Philips Consumer Electronics Corp. | Method and apparatus for improving the rise and fall time of a video signal |
JPH01297980A (ja) * | 1988-05-26 | 1989-12-01 | Matsushita Electric Ind Co Ltd | 輪郭改善回路 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3377425A (en) * | 1964-08-31 | 1968-04-09 | Sarkes Tarzian | Aperture correction circuit |
US3641268A (en) * | 1969-07-24 | 1972-02-08 | Us Navy | Real-time image contrast and edge sharpness enhancing apparatus |
JPS472014U (fr) * | 1971-01-26 | 1972-08-23 | ||
JPS5140739Y2 (fr) * | 1971-07-30 | 1976-10-05 |
-
1973
- 1973-12-17 JP JP14164473A patent/JPS5539948B2/ja not_active Expired
-
1974
- 1974-12-09 US US05/531,050 patent/US3980813A/en not_active Expired - Lifetime
- 1974-12-12 NL NL7416225A patent/NL7416225A/xx not_active Application Discontinuation
- 1974-12-12 GB GB53785/74A patent/GB1482790A/en not_active Expired
- 1974-12-16 CA CA216,133A patent/CA1026457A/fr not_active Expired
- 1974-12-16 FR FR7441428A patent/FR2254921B1/fr not_active Expired
- 1974-12-17 DE DE2459681A patent/DE2459681C3/de not_active Expired
- 1974-12-17 IT IT30667/74A patent/IT1027759B/it active
Also Published As
Publication number | Publication date |
---|---|
DE2459681B2 (de) | 1980-06-04 |
FR2254921B1 (fr) | 1978-06-23 |
DE2459681A1 (de) | 1975-06-26 |
JPS5539948B2 (fr) | 1980-10-15 |
US3980813A (en) | 1976-09-14 |
DE2459681C3 (de) | 1981-02-19 |
NL7416225A (nl) | 1975-06-19 |
GB1482790A (en) | 1977-08-17 |
JPS5093043A (fr) | 1975-07-24 |
FR2254921A1 (fr) | 1975-07-11 |
IT1027759B (it) | 1978-12-20 |
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