GB1289286A - - Google Patents

Info

Publication number
GB1289286A
GB1289286A GB1289286DA GB1289286A GB 1289286 A GB1289286 A GB 1289286A GB 1289286D A GB1289286D A GB 1289286DA GB 1289286 A GB1289286 A GB 1289286A
Authority
GB
United Kingdom
Prior art keywords
level
video signal
clipper
clipping
black level
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
Other languages
English (en)
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 filed Critical
Publication of GB1289286A publication Critical patent/GB1289286A/en
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
    • 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
    • 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
    • H04N5/00—Details of television systems
    • H04N5/66—Transforming electric information into light information

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
GB1289286D 1969-03-21 1970-03-13 Expired GB1289286A (forum.php)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80917869A 1969-03-21 1969-03-21

Publications (1)

Publication Number Publication Date
GB1289286A true GB1289286A (forum.php) 1972-09-13

Family

ID=25200717

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1289286D Expired GB1289286A (forum.php) 1969-03-21 1970-03-13

Country Status (4)

Country Link
US (1) US3582545A (forum.php)
FR (1) FR2035161B1 (forum.php)
GB (1) GB1289286A (forum.php)
NL (1) NL7004030A (forum.php)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293874A (en) * 1980-02-04 1981-10-06 Zenith Radio Corporation DC Restoration circuit for television receiver
US4730210A (en) * 1985-08-14 1988-03-08 Zenith Electronics Corporation Wideband analog RGB video processor with negative feedback capability and black level control
US4688097A (en) * 1986-10-30 1987-08-18 Jerrold Electronics Corp. D.C.-coupled video clamping circuit
US4802024A (en) * 1986-11-12 1989-01-31 Eastman Kodak Company Video reproduction apparatus having automatic black and white calibration
US5390020A (en) * 1992-09-14 1995-02-14 Eastman Kodak Company Video amplifier stabilization for CRT printing

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572179A (en) * 1949-05-24 1951-10-23 Philco Corp Peak leveling circuit
US2850627A (en) * 1952-12-08 1958-09-02 Philco Corp System for maintaining predetermined portions of a signal at a predetermined value
US2875332A (en) * 1953-12-01 1959-02-24 Rca Corp Stabilized clipper and clamp circuits
GB932173A (en) * 1960-05-23 1963-07-24 Gen Precision Inc Sub-miniature gyro
DE1172300B (de) * 1962-07-11 1964-06-18 Fernseh Gmbh Verfahren und Schaltungsanordnung zur UEbertragung eines Videosignals
GB1027249A (en) * 1963-10-08 1966-04-27 Thorn Electronics Ltd Improvements in voltage clamps

Also Published As

Publication number Publication date
DE2013217B2 (de) 1977-04-07
FR2035161A1 (forum.php) 1970-12-18
NL7004030A (forum.php) 1970-09-23
US3582545A (en) 1971-06-01
FR2035161B1 (forum.php) 1976-05-28
DE2013217A1 (de) 1970-10-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee