US5847691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microkeyer for microcomputer broadcast video overlay of a DC restored external video signal with a computer's DC restored video signal
Assignee: Individual
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Filing: 1995-06-06
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Granted: 1998-12-08
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Expires: 2015-06-06
Abstract
Abstract Broadcast standard format video signals such as that adopted by the National Television Standards Committee (NTSC) or the European standard format of Phase Alternating Line (PAL) and some broadcast "compatible" video signals are used as inputs to a microkeyer to synchronize a microcomputer's display in a manner that allows full and complete merging of the two signals (in particular, a computer's DC restored video signal with a DC restored external video signal) in the broadcast video domain by, for example, additive (mixing) or non-additive (keying) processes. The required synchronization (with horizontal and vertical drive components) in turn makes possible incorporation in any video space a variety of computer generated visuals such as illustrative graphics, titling and any other data displayed in the video. The merged video signal from this device may then be displayed on a television monitor, or transmitted, or received, or recorded by a video recorder or processed by a standard broadcast means for example. When applied to any common microcomputer display in its most fundamental form, no additional software is required.
Inventors
- 👤 Henry B. Mistrot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:00
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/74; H04N9/75; G; G09; G09G; G09G5/00; G09G5/12; H04N5/00; H04N5/44; H04N5/445; G09G2340/00; G09G2340/12; G09G2340/125; H04N21/00; H04N21/40; H04N21/47; H04N21/478; H04N9/641
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
103 words
A method of combining a computer's video signal with an external video signal using DC restoration and chroma correction of said video signals to form a color corrected video output signal, comprising the steps of: generating a computer's video signal; providing an external video signal; correcting the chroma component to said external video signal and said computer's video signal; DC restoring the luminance component to said external video signal and said computer's video signal; synchronizing said external video signal and said computer's video signal; and combining said external video signal and said computer's video signal to form a color corrected video output signal.
Claim 2
Independent Claim
103 words
A method of combining a computer's video signal with an external video signal using DC restoration and chroma correction of said video signals to form a color corrected video output signal, comprising the steps of: generating a computer's video signal; providing an external video signal; correcting the chroma component to said external video signal and said computer's video signal; DC restoring the luminance component to said external video signal and said computer's video signal; synchronizing said external video signal and said computer's video signal; and combining said external video signal and said computer's video signal to form a color corrected video output signal.
Claim 3
Dependent Claim
24 words
The method of claim 1 further comprising the step of generating control signals comprising a vertical drive signal and generating a horizontal drive signal.
Claim 4
Dependent Claim
64 words
The method of claim 1 wherein said step of synchronizing said external video signal and said computer's video signal further comprises the steps of: synchronizing said computer's video signal with a horizontal drive synchronization component and a vertical drive synchronization component of said external video signal; and phase locking said computer's video signal with said horizontal drive synchronization component of said external video signal.
Claim 5
Dependent Claim
53 words
The method of claim 1 wherein said step of combining said computer's video signal with said external video signal further comprises the steps of: displaying automatically said computer's video signal in the absence of said external video signal; and displaying automatically said external video signal in the absence of said computer's video signal.
Claim 6
Dependent Claim
126 words
A program storage device readable by a computer, tangibly embodying a program of instructions executable by the computer to perform method steps for a method of combining a computer's video signal with an external video signal using DC restoration and chroma correction of said video signals to form a color corrected video output signal, said method steps comprising: generating a computer's video signal; providing an external video signal; correcting the chroma component to said external video signal and said computer's video signal: DC restoring the luminance component to said external video signal and said computer's video signal; synchronizing said external video signal and said computer's video signal; and combining said external video signal and said computer's video signal to form a color corrected video output signal.
Claim 7
Dependent Claim
126 words
A program storage device readable by a computer, tangibly embodying a program of instructions executable by the computer to perform method steps for a method of combining a computer's video signal with an external video signal using DC restoration and chroma correction of said video signals to form a color corrected video output signal, said method steps comprising: generating a computer's video signal; providing an external video signal; correcting the chroma component to said external video signal and said computer's video signal: DC restoring the luminance component to said external video signal and said computer's video signal; synchronizing said external video signal and said computer's video signal; and combining said external video signal and said computer's video signal to form a color corrected video output signal.
Claim 8
Dependent Claim
26 words
The program storage device of claim 5 further comprising the step of generating control signals comprising a vertical drive signal and generating a horizontal drive signal.
Claim 9
Dependent Claim
66 words
The program storage device of claim 5 wherein said step of synchronizing said external video signal and said computer's video signal further comprises the steps of: synchronizing said computer's video signal with a horizontal drive synchronization component and a vertical drive synchronization component of said external video signal; and phase locking said computer's video signal with said horizontal drive synchronization component of said external video signal.
Claim 10
Dependent Claim
57 words
The program storage device of claim 5 wherein said step of combining said computer's video signal with said external video signal further comprises the steps of: displaying automatically said computer's video signal in the absence of said external video signal; and displaying automatically said plurality of external video signal in the absence of said computer's video signal.
Claim 11
Independent Claim
106 words
A system for combining a computer's video signal with an external video signal using DC restoration and chroma correction of said video signals to form a color corrected video output signal, comprising: a computer's video signal; an external video signal; means for correcting the chroma component of said external video signal and said computer's video signal; means for DC restoring the luminance component to said external video signal and said computer's video signal; means for synchronizing said external video signal and said computer's video signal; and means for combining said external video signal and said computer's video signal to form a color corrected video output signal.
Claim 12
Independent Claim
106 words
A system for combining a computer's video signal with an external video signal using DC restoration and chroma correction of said video signals to form a color corrected video output signal, comprising: a computer's video signal; an external video signal; means for correcting the chroma component of said external video signal and said computer's video signal; means for DC restoring the luminance component to said external video signal and said computer's video signal; means for synchronizing said external video signal and said computer's video signal; and means for combining said external video signal and said computer's video signal to form a color corrected video output signal.
Claim 13
Dependent Claim
25 words
The system of claim 9 further comprising means for generating control signals comprising a vertical drive signal and means for generating a horizontal drive signal.
Claim 14
Dependent Claim
65 words
The system of claim 9 wherein said means for synchronizing said external video signal and said computer's video signal further comprises: means for synchronizing said computer's video signal with a horizontal drive synchronization component and a vertical drive synchronization component of said external video signal; and means for phase locking said computer's video signal with said horizontal drive synchronization component of said external video signal.
Claim 15
Dependent Claim
54 words
The system of claim 9 wherein said means for combining said computer's video signal with said external video signal further comprises: means for displaying automatically said computer's video signal in the absence of said external video signal; and means for displaying automatically said external video signal in the absence of said computer's video signal.
Claim 16
Dependent Claim
102 words
Apparatus for combining a computer's video signal with an external video signal using DC restoration and chroma correction of said video signals to form a color corrected video output signal, comprising: a computer's video signal; an external video signal; chroma correction of the chroma component of said external video signal and said computer's video signal; DC restoration of the luminance component of said external video signal and said computers video signal; synchronization of said external video signal with said computer's video signal; and combination of said external video signal and said computer's video signal to form a color corrected video output signal.
Claim 17
Dependent Claim
102 words
Apparatus for combining a computer's video signal with an external video signal using DC restoration and chroma correction of said video signals to form a color corrected video output signal, comprising: a computer's video signal; an external video signal; chroma correction of the chroma component of said external video signal and said computer's video signal; DC restoration of the luminance component of said external video signal and said computers video signal; synchronization of said external video signal with said computer's video signal; and combination of said external video signal and said computer's video signal to form a color corrected video output signal.
Claim 18
Dependent Claim
19 words
The apparatus of claim 13 further comprising control signals comprising a vertical drive signal and a horizontal drive signal.
Claim 19
Dependent Claim
59 words
The apparatus of claim 13 wherein said external video signal and said computer's video signal further comprises: means for synchronizing said computer's video signal with a horizontal drive synchronization component and a vertical drive synchronization component of said external video signal; and said computer's video signal phase locked with said horizontal drive synchronization component of said external video signal.
Claim 20
Dependent Claim
52 words
The apparatus of claim 13 wherein said means for combining said computer's video signal with said external video signal further comprises: automatic display of said computer's video signal in the absence of said external video signal; and automatic display of said external video signal in the absence of said computer's video signal.
Claim 21
Dependent Claim
30 words
The method of claim 1 wherein said step of synchronizing further comprises the step of phase locking the color component of said external video signal and said computer's video signal.
Claim 22
Dependent Claim
21 words
The method of claim 1 further comprising the step of controlling the color phase of said color corrected video output signal.
Claim 23
Dependent Claim
32 words
The program storage device of claim 5 wherein said step of synchronizing further comprises the step of phase locking the color component of said external video signal and said computer's video signal.
Claim 24
Dependent Claim
23 words
The program storage device of claim 5 further comprising the step of controlling the color phase of said color corrected video output signal.
Claim 25
Dependent Claim
29 words
The system of claim 9 wherein said means for synchronizing further comprises means for phase locking the color component of said external video signal and said computer's video signal.
Claim 26
Dependent Claim
20 words
The system of claim 9 further comprising means for controlling the color phase of said color corrected video output signal.
Claim 27
Dependent Claim
29 words
The apparatus of claim 13 wherein said synchronization loop further comprises a phase locked loop of the color component of said external video signal and said computer's video signal.
Claim 28
Dependent Claim
21 words
The apparatus of claim 13 further comprising phase control to control the color phase of said color corrected video output signal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-12-07 | 2002-06-08 | 2002-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-07 | 2006-06-08 | 2006-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-07 | 2010-06-08 | 2010-12-08 | $7700.00 | Window Closed / Lapsed |