KR910006375B1 - 오토 매스터 페데스털 조정회로 - Google Patents
오토 매스터 페데스털 조정회로 Download PDFInfo
- Publication number
- KR910006375B1 KR910006375B1 KR1019880002883A KR880002883A KR910006375B1 KR 910006375 B1 KR910006375 B1 KR 910006375B1 KR 1019880002883 A KR1019880002883 A KR 1019880002883A KR 880002883 A KR880002883 A KR 880002883A KR 910006375 B1 KR910006375 B1 KR 910006375B1
- Authority
- KR
- South Korea
- Prior art keywords
- amplifier
- value
- video signal
- pedestal
- master pedestal
- 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
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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
- H04N5/16—Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level
- H04N5/18—Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit
- H04N5/185—Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit for the black level
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
-
- 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
- H04N5/16—Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level
- H04N5/18—Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Picture Signal Circuits (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
Description
Claims (2)
- R.G.B 비데오 신호 입력을 자동 이득 조정하여 매스터 페데스털 조정부(40)에 인가시키게 AGC앰프(10)를 구성하고 NAM비데오 신호 입력의 어두운 부분을 검출하고 이를 직류값으로 변환시켜 마이콤(30)에 인가시키는 매스터 페데스털 검출부(20)를 구성하며 상기 매스터 페데스털 검출부(20)의 직류값을 받아 내장된 기준치와 비교하여 보정시킨 직류값을 매스터 페데스털 조정부(40)로 인가시키는 마이콤(30)을 연결 구성한후 상기 마이콤(30)의 보정된 직류값에 의해 AGC앰프(10)를 통과한 비데오 신호의 페데스털 레벨을 자동 조정하는 매스터 페데스털 조정부(40)를 연결 구성시킨 것을 특징으로 하는 오토 매스터 페데스털 조정회로.
- 제1항에 있어서, 매스터 페데스털 검출부(20)는 NAM 비데오 신호를 반전 증폭시키는 OP앰프(OP)와, 상기 OP앰프(OP1)의 출력신호를 저항(R15)과 가변저항 마이콤(30)의 보정된 직류값을 가변저항(VR2)과 다이오드(D1-D3)로 설정된 전압과 혼합시켜 적분시킨후 적분된 값을 트랜지스터(Q1)의 베이스로 피드백시키는 OP앰프(OP4)를 연결 구성시킨 것을 특징으로 하는 오토 매스터 페데스털 조정회로.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019880002883A KR910006375B1 (ko) | 1988-03-17 | 1988-03-17 | 오토 매스터 페데스털 조정회로 |
| US07/310,785 US4933750A (en) | 1988-03-17 | 1989-02-13 | Auto-master pedestal control circuit |
| GB8904228A GB2217139B (en) | 1988-03-17 | 1989-02-24 | Automatic master pedestal control circuit |
| JP1046333A JP2528177B2 (ja) | 1988-03-17 | 1989-02-27 | オ―トマスタペデスタル調整回路 |
| DE3906097A DE3906097C2 (de) | 1988-03-17 | 1989-02-27 | Automatische Schwarzwertregelschaltung |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019880002883A KR910006375B1 (ko) | 1988-03-17 | 1988-03-17 | 오토 매스터 페데스털 조정회로 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR890015581A KR890015581A (ko) | 1989-10-30 |
| KR910006375B1 true KR910006375B1 (ko) | 1991-08-21 |
Family
ID=19272915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019880002883A Expired KR910006375B1 (ko) | 1988-03-17 | 1988-03-17 | 오토 매스터 페데스털 조정회로 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4933750A (ko) |
| JP (1) | JP2528177B2 (ko) |
| KR (1) | KR910006375B1 (ko) |
| DE (1) | DE3906097C2 (ko) |
| GB (1) | GB2217139B (ko) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19549658B4 (de) * | 1994-06-09 | 2006-02-23 | Mitsubishi Denki K.K. | Vorrichtung zur Bilddarstellung |
| DE10064678C1 (de) * | 2000-12-22 | 2002-07-11 | Kappa Opto Electronics Gmbh | Verfahren zur Signalverbesserung in einer mit einer digitalen Farbvideokamera aufgenommenen Bilderfolge |
| DE60108602D1 (de) * | 2000-12-22 | 2005-03-03 | Unilever Nv | Verfahren zur Herstellung von Öl mit erhöhtem Polyphenolgehalt |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE637339A (ko) * | 1962-09-12 | |||
| US3283067A (en) * | 1964-04-03 | 1966-11-01 | Rca Corp | Signal processing apparatus for color systems utilizing separate luminance signal pickup |
| FR1511057A (fr) * | 1966-12-14 | 1968-01-26 | Csf | Perfectionnements aux caméras de télévision en couleurs |
| US3651248A (en) * | 1969-01-11 | 1972-03-21 | Fernseh Gmbh | Black level clamping by color signal difference gated to storage during beam blocking |
| JPS5521495B2 (ko) * | 1973-08-07 | 1980-06-10 | ||
| JPS5685989A (en) * | 1979-12-14 | 1981-07-13 | Mitsubishi Electric Corp | Automatic color balance adjusting circuit |
| JPS56107674A (en) * | 1980-01-31 | 1981-08-26 | Sony Corp | Gradation correcting device of video signal |
| JPS60112155U (ja) * | 1984-01-05 | 1985-07-30 | 株式会社東芝 | 自動輝度調整回路 |
| JPS61140279A (ja) * | 1984-12-12 | 1986-06-27 | Toshiba Corp | 映像信号処理回路 |
-
1988
- 1988-03-17 KR KR1019880002883A patent/KR910006375B1/ko not_active Expired
-
1989
- 1989-02-13 US US07/310,785 patent/US4933750A/en not_active Expired - Lifetime
- 1989-02-24 GB GB8904228A patent/GB2217139B/en not_active Expired - Lifetime
- 1989-02-27 JP JP1046333A patent/JP2528177B2/ja not_active Expired - Lifetime
- 1989-02-27 DE DE3906097A patent/DE3906097C2/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US4933750A (en) | 1990-06-12 |
| GB8904228D0 (en) | 1989-04-12 |
| DE3906097C2 (de) | 1994-01-13 |
| GB2217139A (en) | 1989-10-18 |
| JPH01256281A (ja) | 1989-10-12 |
| KR890015581A (ko) | 1989-10-30 |
| JP2528177B2 (ja) | 1996-08-28 |
| GB2217139B (en) | 1992-07-22 |
| DE3906097A1 (de) | 1989-10-05 |
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