GB2168564B - Improvements in or relating to keying of video signals - Google Patents

Improvements in or relating to keying of video signals

Info

Publication number
GB2168564B
GB2168564B GB08523128A GB8523128A GB2168564B GB 2168564 B GB2168564 B GB 2168564B GB 08523128 A GB08523128 A GB 08523128A GB 8523128 A GB8523128 A GB 8523128A GB 2168564 B GB2168564 B GB 2168564B
Authority
GB
United Kingdom
Prior art keywords
keying
relating
video signals
video
signals
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
GB08523128A
Other versions
GB2168564A (en
GB8523128D0 (en
Inventor
James Edward Attew
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.)
ELECTROCRAFT CONSULTANTS LIMIT
Original Assignee
ELECTROCRAFT CONSULTANTS LIMIT
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 ELECTROCRAFT CONSULTANTS LIMIT filed Critical ELECTROCRAFT CONSULTANTS LIMIT
Publication of GB8523128D0 publication Critical patent/GB8523128D0/en
Publication of GB2168564A publication Critical patent/GB2168564A/en
Application granted granted Critical
Publication of GB2168564B publication Critical patent/GB2168564B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/74—Circuits for processing colour signals for obtaining special effects
    • H04N9/75—Chroma key

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
GB08523128A 1984-09-19 1985-09-19 Improvements in or relating to keying of video signals Expired GB2168564B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB848423654A GB8423654D0 (en) 1984-09-19 1984-09-19 Colour separation overlay

Publications (3)

Publication Number Publication Date
GB8523128D0 GB8523128D0 (en) 1985-10-23
GB2168564A GB2168564A (en) 1986-06-18
GB2168564B true GB2168564B (en) 1988-03-16

Family

ID=10566934

Family Applications (2)

Application Number Title Priority Date Filing Date
GB848423654A Pending GB8423654D0 (en) 1984-09-19 1984-09-19 Colour separation overlay
GB08523128A Expired GB2168564B (en) 1984-09-19 1985-09-19 Improvements in or relating to keying of video signals

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB848423654A Pending GB8423654D0 (en) 1984-09-19 1984-09-19 Colour separation overlay

Country Status (1)

Country Link
GB (2) GB8423654D0 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1313706C (en) * 1986-10-24 1993-02-16 Richard A. Jackson Method and apparatus for processing a video signal
US5202762A (en) * 1991-09-10 1993-04-13 Ultimatte Corporation Method and apparatus for applying correction to a signal used to modulate a background video signal to be combined with a foreground video signal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3143653A1 (en) * 1981-11-04 1983-05-11 Robert Bosch Gmbh, 7000 Stuttgart METHOD FOR MIXING TWO COLOR TV SIGNALS

Also Published As

Publication number Publication date
GB2168564A (en) 1986-06-18
GB8523128D0 (en) 1985-10-23
GB8423654D0 (en) 1984-10-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee