CA955326A - Chroma key circuit - Google Patents

Chroma key circuit

Info

Publication number
CA955326A
CA955326A CA136,640A CA136640A CA955326A CA 955326 A CA955326 A CA 955326A CA 136640 A CA136640 A CA 136640A CA 955326 A CA955326 A CA 955326A
Authority
CA
Canada
Prior art keywords
key circuit
chroma key
chroma
circuit
key
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
CA136,640A
Other languages
English (en)
Other versions
CA136640S (en
Inventor
Peter Boxman
Frederik J. Van Roessel
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.)
Philips Broadcast Equipment Corp
Original Assignee
Philips Broadcast Equipment 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 Philips Broadcast Equipment Corp filed Critical Philips Broadcast Equipment Corp
Application granted granted Critical
Publication of CA955326A publication Critical patent/CA955326A/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)
  • Color Television Image Signal Generators (AREA)
CA136,640A 1971-03-12 1972-03-09 Chroma key circuit Expired CA955326A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12369071A 1971-03-12 1971-03-12

Publications (1)

Publication Number Publication Date
CA955326A true CA955326A (en) 1974-09-24

Family

ID=22410266

Family Applications (1)

Application Number Title Priority Date Filing Date
CA136,640A Expired CA955326A (en) 1971-03-12 1972-03-09 Chroma key circuit

Country Status (8)

Country Link
US (1) US3678182A (fr)
JP (1) JPS5412018B1 (fr)
AU (1) AU454371B2 (fr)
CA (1) CA955326A (fr)
DE (1) DE2209754C3 (fr)
FR (1) FR2128875B1 (fr)
GB (1) GB1360705A (fr)
IT (1) IT957549B (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2142820B1 (fr) * 1971-06-25 1975-04-18 Ortf
US3749822A (en) * 1971-12-30 1973-07-31 Veer F V D Animation method and apparatus
US3959813A (en) * 1973-12-08 1976-05-25 Robert Bosch G.M.B.H. Generation of a switching signal for the chroma keying of color video signals
US4109278A (en) * 1975-03-21 1978-08-22 Sonex International Corp. Video traveling matte system
NL7509871A (nl) * 1975-08-20 1977-02-22 Philips Nv Kleurentelevisie chroma-sleutelsignaalgenerator.
JPS6011875B2 (ja) * 1977-08-17 1985-03-28 日本電気株式会社 クロマキ−トラツキング装置
NL7807350A (nl) * 1978-07-07 1980-01-09 Philips Nv Kleurselectieschakeling voor kleurentelevisie.
US4183045A (en) * 1978-08-30 1980-01-08 Rca Corporation Chroma keying selector system
DE3027053A1 (de) * 1980-07-17 1982-02-11 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur zeitlichen korrektur von digitalen schaltsignalen
DE3027054A1 (de) * 1980-07-17 1982-02-11 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur ableitung eines digitalen steuersignals
NL8006546A (nl) * 1980-12-02 1982-07-01 Philips Nv Kamerastelsel voor kleurentelevisie.
JPS5846783A (ja) * 1981-09-12 1983-03-18 Sony Corp クロマキ−装置
GB2158320A (en) * 1984-04-26 1985-11-06 Philips Electronic Associated Generating a chroma keying signal
US4953008A (en) * 1986-09-08 1990-08-28 Encore Video, Inc. Method and apparatus for uniform saturation, hue and luminance correction
AU610089B2 (en) * 1986-09-08 1991-05-16 Mscl, Inc. Method and apparatus for correcting video color signals
US5134465A (en) * 1989-08-30 1992-07-28 Hitachi Video Engineering, Inc. Color detecting circuit
US5051828A (en) * 1990-04-27 1991-09-24 The Grass Valley Group, Inc. Keyer with variable shaping
JPH05130502A (ja) * 1991-11-08 1993-05-25 Pioneer Electron Corp 画像再生装置
US8264468B1 (en) 2007-06-19 2012-09-11 Imaging Systems Technology, Inc. Touch system for blue screen
US8330730B1 (en) 2007-09-04 2012-12-11 Imaging Systems Technology, Inc. Calibrating of interactive touch system for image compositing

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2723307A (en) * 1953-11-30 1955-11-08 Itt Montage amplifier
US3595987A (en) * 1969-02-20 1971-07-27 Ass Motion Picture Tv Prod Electronic composite photography
US3619495A (en) * 1969-08-21 1971-11-09 Nippon Electric Co Television picture montage circuit

Also Published As

Publication number Publication date
FR2128875B1 (fr) 1975-04-25
FR2128875A1 (fr) 1972-10-20
AU454371B2 (en) 1974-10-03
DE2209754A1 (de) 1972-10-05
AU3985272A (en) 1973-09-13
JPS5412018B1 (fr) 1979-05-19
GB1360705A (en) 1974-07-17
IT957549B (it) 1973-10-20
DE2209754B2 (de) 1979-02-08
US3678182A (en) 1972-07-18
DE2209754C3 (de) 1979-10-04

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