FR2551288B1 - Circuit de restitution du niveau du noir - Google Patents

Circuit de restitution du niveau du noir

Info

Publication number
FR2551288B1
FR2551288B1 FR8413091A FR8413091A FR2551288B1 FR 2551288 B1 FR2551288 B1 FR 2551288B1 FR 8413091 A FR8413091 A FR 8413091A FR 8413091 A FR8413091 A FR 8413091A FR 2551288 B1 FR2551288 B1 FR 2551288B1
Authority
FR
France
Prior art keywords
black level
restitution circuit
restitution
circuit
black
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
Application number
FR8413091A
Other languages
English (en)
Other versions
FR2551288A1 (fr
Inventor
Masayuki Hongu
Takahiko Tamura
Masaharu Tokuhara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Publication of FR2551288A1 publication Critical patent/FR2551288A1/fr
Application granted granted Critical
Publication of FR2551288B1 publication Critical patent/FR2551288B1/fr
Expired legal-status Critical Current

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
    • H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
    • H04N5/165—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level to maintain the black level constant

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
FR8413091A 1983-08-22 1984-08-22 Circuit de restitution du niveau du noir Expired FR2551288B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58152926A JPS6043972A (ja) 1983-08-22 1983-08-22 映像の黒レベル再生回路

Publications (2)

Publication Number Publication Date
FR2551288A1 FR2551288A1 (fr) 1985-03-01
FR2551288B1 true FR2551288B1 (fr) 1989-01-20

Family

ID=15551158

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8413091A Expired FR2551288B1 (fr) 1983-08-22 1984-08-22 Circuit de restitution du niveau du noir

Country Status (11)

Country Link
US (1) US4631589A (fr)
JP (1) JPS6043972A (fr)
AT (1) AT386709B (fr)
AU (1) AU568563B2 (fr)
CA (1) CA1220851A (fr)
DE (1) DE3430593A1 (fr)
FR (1) FR2551288B1 (fr)
GB (1) GB2145599B (fr)
IT (1) IT1178503B (fr)
MY (1) MY100653A (fr)
NL (1) NL192762C (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61204320A (ja) * 1985-03-06 1986-09-10 Kawasaki Steel Corp 耐リジング性に優れる加工用アズロ−ルド薄鋼板の製造方法
GB8507652D0 (en) * 1985-03-25 1985-05-01 Irex Corp Hard copy recorders
JPH0797830B2 (ja) * 1986-04-08 1995-10-18 ソニー株式会社 ビデオカメラの黒レベル補正回路
JPS645569U (fr) * 1987-06-26 1989-01-12
KR910006376B1 (ko) * 1988-08-06 1991-08-21 삼성전자 주식회사 비데오 카메라의 자동 콘트라스트 조절회로
JP2532932B2 (ja) * 1988-11-19 1996-09-11 三洋電機株式会社 直流再生回路
US4975773A (en) * 1989-03-31 1990-12-04 Zenith Electronics Corporation Dynamic range video black level expander
JPH0316539A (ja) * 1989-06-14 1991-01-24 Sanyo Electric Co Ltd 電動調理器
JP3257788B2 (ja) * 1990-05-01 2002-02-18 ソニー株式会社 画像表示装置
JP2599020B2 (ja) * 1990-07-19 1997-04-09 松下電器産業株式会社 黒レベル補正回路
US5334998A (en) * 1991-07-05 1994-08-02 Sun Microsystems, Inc. Method and apparatus for utilizing blanking on both zero setup and pedestal setup display monitors with a conventional computer system
JP3153918B2 (ja) * 1991-09-30 2001-04-09 ソニー株式会社 固体撮像装置および遮光検出装置
DE4239365A1 (de) * 1992-11-24 1994-05-26 Philips Patentverwaltung Schaltungsanordnung zum Verarbeiten eines Videosignals
KR0128520B1 (ko) * 1993-02-26 1998-04-04 김광호 동기신호 분배기를 이용한 키드 클램프회로
JP3291843B2 (ja) * 1993-07-05 2002-06-17 ソニー株式会社 映像信号の黒レベル再生装置
US5986719A (en) * 1996-05-28 1999-11-16 Analog Devices, Inc. Video signal clamping method and apparatus with negative peak detection
US6671001B2 (en) * 2001-02-26 2003-12-30 Mitac International Corp. Offset level detection method for auto color gain control of analog video signals

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970777A (en) * 1975-06-09 1976-07-20 Minnesota Mining And Manufacturing Company Apparatus for adjusting video pedestal and peak white level
DE2628662C3 (de) * 1976-06-25 1980-03-06 Robert Bosch Gmbh, 7000 Stuttgart System zur Korrektur der digitalen Wertigkeit von Signalen
JPS5553978A (en) * 1978-10-17 1980-04-19 Sony Corp Automatic luminance adjusting device for television picture receiver
JPS5628569A (en) * 1979-08-17 1981-03-20 Sony Corp Video signal processing circuit
JPS5675780A (en) * 1979-11-26 1981-06-23 Sony Corp Video signal processing circuit

Also Published As

Publication number Publication date
DE3430593A1 (de) 1985-03-07
FR2551288A1 (fr) 1985-03-01
JPS6043972A (ja) 1985-03-08
IT8422373A0 (it) 1984-08-21
NL192762C (nl) 1998-01-06
AU568563B2 (en) 1988-01-07
NL192762B (nl) 1997-09-01
JPH0560299B2 (fr) 1993-09-02
DE3430593C2 (fr) 1993-04-08
ATA269284A (de) 1988-02-15
GB2145599B (en) 1987-02-04
GB2145599A (en) 1985-03-27
IT1178503B (it) 1987-09-09
NL8402571A (nl) 1985-03-18
GB8420657D0 (en) 1984-09-19
MY100653A (en) 1990-12-29
US4631589A (en) 1986-12-23
CA1220851A (fr) 1987-04-21
AU3139484A (en) 1985-02-28
AT386709B (de) 1988-10-10

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