Patent US3764732A successfully refreshed from Google Patents.
US3764732A
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Method and apparatus for replacing a part of a first television image by a part of a second television image
Assignee: Office de Radiodiffusion-Television Francaise
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Filing: 1972-06-21
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Granted: 1973-10-09
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Expires: 1992-06-21
Abstract
Abstract A method for replacing a part of a first television image by a part of a second television image is disclosed in which first or second image signals representing the respective first and second images are selecting according to a binary control signal of which a first level selects signals of the first image and a second level selects signals of the second image. A corresponding apparatus is also disclosed in which circuitry is provided for producing the first level when the amplitude of the second signal lies in a given range and the second level when the amplitude of the second signals lies outside the given range. Said method and apparatus may be used for replacing a part of a decoration by a person in a color television system.
Inventors
- 👤 G Macheboeuf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:18
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/74; H04N9/75
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
122 words
A method for replacing a part of a first colour television image by a part of a second colour television image comprising the steps of: selecting first and second video signals representing said first and second colour television images according to respective first and second levels of a binary control signal; producing said first level of said binary control signal when one of said first and second video signals lies between two predetermined voltages, said two predetermined voltages lying within and not extending to the limits of said one of said first and second video signals, and producing said second level of said binary control signal when said one of said first and second video signals lies outside said two predetermined voltages.
Claim 2
Independent Claim
122 words
A method for replacing a part of a first colour television image by a part of a second colour television image comprising the steps of: selecting first and second video signals representing said first and second colour television images according to respective first and second levels of a binary control signal; producing said first level of said binary control signal when one of said first and second video signals lies between two predetermined voltages, said two predetermined voltages lying within and not extending to the limits of said one of said first and second video signals, and producing said second level of said binary control signal when said one of said first and second video signals lies outside said two predetermined voltages.
Claim 3
Dependent Claim
66 words
A method as claimed in claim 1, wherein said first level is generated when the second video signals lie in a given closed region of a space defined by a colorimetric coordinate system having orthogonal axes, said region defining the background of the image in the coordinate system, and said second level is generated when the second video signals lie in the remainder of the space.
Claim 4
Dependent Claim
14 words
A method as claimed in claim 2, wherein the closed region is a parallelepiped.
Claim 5
Independent Claim
122 words
An aPparatus for replacing a part of a first colour television image by a part of a second colour television image comprising means for selecting first and second video signals corresponding to said first and second colour television images according to respective first and second levels of a binary control signal; circuitry means for producing said first level of binary control signal when the amplitude of the second video signals lie in a given range and for producing the second level of binary control signal when the amplitude of said second video signals lie outside of said given range and wherein the limits of said given range are included within but do not extend to the limits of said second video signals.
Claim 6
Independent Claim
122 words
An aPparatus for replacing a part of a first colour television image by a part of a second colour television image comprising means for selecting first and second video signals corresponding to said first and second colour television images according to respective first and second levels of a binary control signal; circuitry means for producing said first level of binary control signal when the amplitude of the second video signals lie in a given range and for producing the second level of binary control signal when the amplitude of said second video signals lie outside of said given range and wherein the limits of said given range are included within but do not extend to the limits of said second video signals.
Claim 7
Dependent Claim
84 words
Apparatus as claimed in claim 4, wherein said circuitry comprises a first comparator means for comparing said second video signals to a first reference voltage corresponding to the first level of said binary control signal, a second comparator means for comparing said second video signals to a second reference voltage corresponding to the second level of said binary control signal, an inverter for inverting the output of one of the comparators, an AND gate which is connected to said first comparator and said inverter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |