CA955326A - Chroma key circuit - Google Patents

Chroma key circuit

Info

Publication number: CA955326A
Authority: CA; Canada
Prior art keywords: key circuit; chroma key; chroma; circuit; key
Prior art date: 1971-03-12
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 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.)

1971-03-12

Filing date

1972-03-09

Publication date

1974-09-24

1972-03-09 Application filed by Philips Broadcast Equipment Corp filed Critical Philips Broadcast Equipment Corp

1974-09-24 Application granted granted Critical

1974-09-24 Publication of CA955326A publication Critical patent/CA955326A/en

Status 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

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 (en)
JP (1)	JPS5412018B1 (en)
AU (1)	AU454371B2 (en)
CA (1)	CA955326A (en)
DE (1)	DE2209754C3 (en)
FR (1)	FR2128875B1 (en)
GB (1)	GB1360705A (en)
IT (1)	IT957549B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2142820B1 (en) *	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 (en) *	1975-08-20	1977-02-22	Philips Nv	COLOR TV CHROMA KEY SIGNAL GENERATOR.
JPS6011875B2 (en) *	1977-08-17	1985-03-28	日本電気株式会社	Chroma key tracking device
NL7807350A (en) *	1978-07-07	1980-01-09	Philips Nv	COLOR SELECTION CHANGE FOR COLOR TELEVISION.
US4183045A (en) *	1978-08-30	1980-01-08	Rca Corporation	Chroma keying selector system
DE3027053A1 (en) *	1980-07-17	1982-02-11	Robert Bosch Gmbh, 7000 Stuttgart	METHOD FOR THE CORRECTIVE CORRECTION OF DIGITAL SWITCHING SIGNALS
DE3027054A1 (en) *	1980-07-17	1982-02-11	Robert Bosch Gmbh, 7000 Stuttgart	METHOD FOR DERIVING A DIGITAL CONTROL SIGNAL
NL8006546A (en) *	1980-12-02	1982-07-01	Philips Nv	CAMERA SYSTEM FOR COLOR TELEVISION.
JPS5846783A (en) *	1981-09-12	1983-03-18	Sony Corp	Chromakey device
GB2158320A (en) *	1984-04-26	1985-11-06	Philips Electronic Associated	Generating a chroma keying signal
AU610089B2 (en) *	1986-09-08	1991-05-16	Mscl, Inc.	Method and apparatus for correcting video color signals
US4953008A (en) *	1986-09-08	1990-08-28	Encore Video, Inc.	Method and apparatus for uniform saturation, hue and luminance correction
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 (en) *	1991-11-08	1993-05-25	Pioneer Electron Corp	Image reproducing device
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

1971
- 1971-03-12 US US123690A patent/US3678182A/en not_active Expired - Lifetime
1972
- 1972-03-01 DE DE2209754A patent/DE2209754C3/en not_active Expired
- 1972-03-09 CA CA136,640A patent/CA955326A/en not_active Expired
- 1972-03-09 GB GB1106472A patent/GB1360705A/en not_active Expired
- 1972-03-09 IT IT48877/72A patent/IT957549B/en active
- 1972-03-10 JP JP2403272A patent/JPS5412018B1/ja active Pending
- 1972-03-10 AU AU39852/72A patent/AU454371B2/en not_active Expired
- 1972-03-13 FR FR7208628A patent/FR2128875B1/fr not_active Expired

Also Published As

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

Publication	Publication Date	Title
AU454371B2 (en)	1974-10-03	Chroma key circuit
AU467907B2 (en)	1975-12-18	Circuit breaker
AU448069B2 (en)	1974-05-09	Circuit breaker
CA977400A (en)	1975-11-04	Circuit breaker case
CA967627A (en)	1975-05-13	Parallel-pole circuit breaker
CA1001786A (en)	1976-12-14	Ring-trip circuit
AU477183B2 (en)	1976-10-14	Solid state circuit
CA975062A (en)	1975-09-23	Blanking circuit
CA933991A (en)	1973-09-18	Circuit interrupter
AU445838B2 (en)	1974-03-07	Circuit breaker
CA963975A (en)	1975-03-04	Integrating circuit
CA955999A (en)	1974-10-08	Electronic switch
AU4603472A (en)	1974-03-07	Solid state circuit
CA958910A (en)	1974-12-10	Keys
AU4958472A (en)	1974-06-06	Line synchronising circuit
CA1016999A (en)	1977-09-06	Click-less switching circuit
CA885132A (en)	1971-11-02	Convergence circuit
CA961132A (en)	1975-01-14	Commutating circuit
CA884526A (en)	1971-10-26	Comparing circuit
CA875728A (en)	1971-07-13	Frequency-doubler circuit
CA888946A (en)	1971-12-21	Comparison circuit
AU463080B2 (en)	1975-06-27	Circuit arrangement
CA998722A (en)	1976-10-19	Circuit breaker case
CA1016224A (en)	1977-08-23	Circuit breaker case
AU435449B2 (en)	1973-05-09	Circuit interrupter