JPS5689173A - Vertical aperture correcting circuit - Google Patents
Vertical aperture correcting circuitInfo
- Publication number
- JPS5689173A JPS5689173A JP16622179A JP16622179A JPS5689173A JP S5689173 A JPS5689173 A JP S5689173A JP 16622179 A JP16622179 A JP 16622179A JP 16622179 A JP16622179 A JP 16622179A JP S5689173 A JPS5689173 A JP S5689173A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- vertical aperture
- supplied
- luminance 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
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)
- Color Television Image Signal Generators (AREA)
- Processing Of Color Television Signals (AREA)
- Studio Circuits (AREA)
Abstract
PURPOSE: To correct the vertical aperture while reducing or eliminating line crawl, by correcting the luminance signal by the signal obtained by slicing the signal indicating the level change of the luminance signal.
CONSTITUTION: Luminance signal Ea from image pickup tube 1 is not only supplied to adding circuit 3 and subtracting circuit 12 through process amplifier 2 but also supplied to delay circuit 11 to generate signal Eb. Signal Ec indicating level change of signal E is formed in subtracting circuit 12 by expression Ec=Ea-Eb, and this signal Ec is sliced by slice circuit 21 to obtain signal Ed indicating minute level fluctuation of luminance signal Ea. Signal Ed is subtracted 3 from luminance signal Ea to obtain luminance signal Ee without line crawl. Signal Ec from circuit 12 is supplied to clip circuit 24 and becomes vertical aperture correcting signal Ef and is supplied to adding circuit 3. Consequently, since signal Ef is added to signal Ee, luminance signal Ey without line crawl components and with the vertical aperture corrected is obtained from circuit 3.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16622179A JPS5689173A (en) | 1979-12-20 | 1979-12-20 | Vertical aperture correcting circuit |
NL8006811A NL8006811A (en) | 1979-12-20 | 1980-12-16 | VIDEO SIGNAL PROCESSING CIRCUIT, IN PARTICULAR FOR THE benefit of VERTICAL APERATURE CORRECTION. |
GB8040227A GB2067045B (en) | 1979-12-20 | 1980-12-16 | Vertical aperture correction of a video signal |
AT618180A AT379924B (en) | 1979-12-20 | 1980-12-18 | VERTICAL APERTURE CORRECTION |
CA000367207A CA1147848A (en) | 1979-12-20 | 1980-12-19 | Vertical aperture correction circuit |
FR8027131A FR2473240B1 (en) | 1979-12-20 | 1980-12-19 | COLOR CAMERA HAVING A VERTICAL OPENING CORRECTION CIRCUIT |
DE19803048544 DE3048544A1 (en) | 1979-12-20 | 1980-12-22 | VERTICAL CORRECTION CIRCUIT |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16622179A JPS5689173A (en) | 1979-12-20 | 1979-12-20 | Vertical aperture correcting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5689173A true JPS5689173A (en) | 1981-07-20 |
Family
ID=15827350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16622179A Pending JPS5689173A (en) | 1979-12-20 | 1979-12-20 | Vertical aperture correcting circuit |
Country Status (7)
Country | Link |
---|---|
JP (1) | JPS5689173A (en) |
AT (1) | AT379924B (en) |
CA (1) | CA1147848A (en) |
DE (1) | DE3048544A1 (en) |
FR (1) | FR2473240B1 (en) |
GB (1) | GB2067045B (en) |
NL (1) | NL8006811A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02142282A (en) * | 1988-11-24 | 1990-05-31 | Hitachi Denshi Ltd | Video signal processor |
JPH04309075A (en) * | 1991-04-05 | 1992-10-30 | Sanyo Electric Co Ltd | Luminance signal processing circuit |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3140761C2 (en) * | 1981-10-14 | 1983-08-11 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Circuit for steepening the edges of a video signal, especially for a video recorder |
US4628867A (en) * | 1983-02-16 | 1986-12-16 | Brougham Peter H | Water supply to watering troughs |
GB2151429B (en) * | 1983-11-26 | 1987-03-18 | Toshiba Kk | Vertical contour correction device |
JPS60114090A (en) * | 1983-11-26 | 1985-06-20 | Toshiba Corp | Vertical contour correction device |
DE3418794A1 (en) * | 1984-05-19 | 1985-11-21 | Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co KG, 8510 Fürth | METHOD FOR TRANSMITTING NARROW TAPE |
KR890004853B1 (en) * | 1985-01-28 | 1989-11-29 | 미쓰비시전기 주식회사 | Circuits for processing video signals |
JPS62239670A (en) * | 1986-04-11 | 1987-10-20 | Ikegami Tsushinki Co Ltd | Contour emphasizing device |
JPH01220975A (en) * | 1988-02-29 | 1989-09-04 | Toshiba Corp | Picture quality adjustment circuit |
KR920008629B1 (en) * | 1990-09-27 | 1992-10-02 | 삼성전자 주식회사 | Compensation circuit stressing image |
US5287174A (en) * | 1991-04-05 | 1994-02-15 | Sanyo Electric Co., Ltd. | Vertical resolution correcting circuit for video signal |
JP2756070B2 (en) * | 1992-04-09 | 1998-05-25 | 三菱電機エンジニアリング株式会社 | Waveform shaping method, waveform shaping device, and contour correction device for carrier color signal |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5087228A (en) * | 1973-12-03 | 1975-07-14 | ||
JPS53132214A (en) * | 1977-04-25 | 1978-11-17 | Sony Corp | Vertical aperture correction circuit |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS517381B1 (en) * | 1970-10-14 | 1976-03-06 | ||
NL158987B (en) * | 1972-06-10 | 1978-12-15 | Philips Nv | APERTURE CORRECTOR FOR A TELEVISION IMAGE SIGNAL, AS WELL AS A TELEVISION RECORDING DEVICE, FITTED THIS. |
-
1979
- 1979-12-20 JP JP16622179A patent/JPS5689173A/en active Pending
-
1980
- 1980-12-16 NL NL8006811A patent/NL8006811A/en not_active Application Discontinuation
- 1980-12-16 GB GB8040227A patent/GB2067045B/en not_active Expired
- 1980-12-18 AT AT618180A patent/AT379924B/en not_active IP Right Cessation
- 1980-12-19 FR FR8027131A patent/FR2473240B1/en not_active Expired
- 1980-12-19 CA CA000367207A patent/CA1147848A/en not_active Expired
- 1980-12-22 DE DE19803048544 patent/DE3048544A1/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5087228A (en) * | 1973-12-03 | 1975-07-14 | ||
JPS53132214A (en) * | 1977-04-25 | 1978-11-17 | Sony Corp | Vertical aperture correction circuit |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02142282A (en) * | 1988-11-24 | 1990-05-31 | Hitachi Denshi Ltd | Video signal processor |
JPH04309075A (en) * | 1991-04-05 | 1992-10-30 | Sanyo Electric Co Ltd | Luminance signal processing circuit |
Also Published As
Publication number | Publication date |
---|---|
ATA618180A (en) | 1985-07-15 |
DE3048544A1 (en) | 1981-09-17 |
AT379924B (en) | 1986-03-10 |
FR2473240A1 (en) | 1981-07-10 |
DE3048544C2 (en) | 1989-01-05 |
NL8006811A (en) | 1981-07-16 |
FR2473240B1 (en) | 1985-10-11 |
GB2067045B (en) | 1984-02-01 |
GB2067045A (en) | 1981-07-15 |
CA1147848A (en) | 1983-06-07 |
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