US5031043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video signal selection means for transmitting signal and key information over a signal channel
Assignee: Grass Valley USA LLC
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Filing: 1990-03-05
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Granted: 1991-07-09
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Expires: 2010-03-05
Abstract
Abstract A video signal is processed in response to a key signal by selecting the video signal when the value of the key signal is within a first range and selecting a second signal when the value of the key signal is within a second range that excludes the first range. The amplitude of the second signal is outside the range of a video signal throughout the active picture interval.
Inventors
- 👤 Alfred J. Rocco
- 👤 Thomas T. Milam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:35
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N5/278; H04N5/272
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
92 words
Apparatus for processing a video signal having a selected range of amplitudes within the active picture interval, comprising: a source of a second signal of which the amplitude is outside said selected range throughout the active picture interval, a source of a key signal, and selector means responsive to the key signal to select the video signal when the value of the key signal is within a first range and to select the second signal when the value of the key signal is within a second range that excludes the first range.
Claim 2
Dependent Claim
92 words
Apparatus for processing a video signal having a selected range of amplitudes within the active picture interval, comprising: a source of a second signal of which the amplitude is outside said selected range throughout the active picture interval, a source of a key signal, and selector means responsive to the key signal to select the video signal when the value of the key signal is within a first range and to select the second signal when the value of the key signal is within a second range that excludes the first range.
Claim 3
Dependent Claim
12 words
Apparatus according to claim 1, wherein the selector means comprise a multiplier.
Claim 4
Dependent Claim
19 words
Apparatus according to claim 1, further comprising manipulator means for spatially transforming the signal provided by the selector means.
Claim 5
Dependent Claim
42 words
Apparatus according to claim 3, further comprising a keyer for receiving the signal provided by the manipulator means and generating a second key signal in response thereto, the keyer being responsive to the level of the signal provided by the manipulator means.
Claim 6
Dependent Claim
12 words
Apparatus according to claim 4, wherein the keyer is a luminance keyer.
Claim 7
Dependent Claim
33 words
Apparatus according to claim 4, further comprising combiner means for combining the signal provided by the manipulator means with a further video signal in accordance with the value of the second key signal.
Claim 8
Dependent Claim
95 words
Apparatus according to claim 6, wherein the combiner means comprise a multiplier responsive to the second key signal to select the signal provided by the manipulator means when the value of the second key signal is within a first range of values of the second key signal and to select the further video signal when the value of the second key signal is within a second range of values of the second key signal, said second range of values of the second key signal excluding said first range of values of the second key signal.
Claim 9
Dependent Claim
95 words
Video production apparatus comprising: a source of a video signal having a selected range of amplitudes within the active picture interval, a source of a second signal of which the amplitude is outside said selected range throughout the active picture interval, a source of a key signal, and selector means responsive to the key signal to select the video signal when the value of the key signal is within a first range and to select the second signal when the value of the key signal is within a second range that excludes the first range.
Claim 10
Dependent Claim
95 words
Video production apparatus comprising: a source of a video signal having a selected range of amplitudes within the active picture interval, a source of a second signal of which the amplitude is outside said selected range throughout the active picture interval, a source of a key signal, and selector means responsive to the key signal to select the video signal when the value of the key signal is within a first range and to select the second signal when the value of the key signal is within a second range that excludes the first range.
Claim 11
Dependent Claim
32 words
Apparatus according to claim 8, wherein the source of the video signal comprises at least two video signal sources and a switcher operative to select any one f the video signal sources.
Claim 12
Dependent Claim
19 words
Apparatus according to claim 8, further comprising manipulator means for spatially transforming the signal provided by the selector means.
Claim 13
Dependent Claim
42 words
Apparatus according to claim 10, further comprising a keyer for receiving the signal provided by the manipulator means and generating a second key signal in response thereto, the keyer being responsive to the level of the signal provided by the manipulator means.
Claim 14
Dependent Claim
12 words
Apparatus according to claim 11, wherein the keyer is a luminance keyer.
Claim 15
Dependent Claim
16 words
Apparatus according to claim 12, wherein the source of the video signal is a character generator.
Claim 16
Dependent Claim
33 words
Apparatus according to claim 11, further comprising combiner means for combining the signal provided by the manipulator means with a further video signal in accordance with the value of the second key signal.
Claim 17
Dependent Claim
95 words
Apparatus according to claim 14, wherein the combiner means comprise a multiplier responsive to the second key signal to select the signal provided by the manipulator means when the value of the second key signal is within a first range of values of the second key signal and to select the further video signal when the value of the second key signal is within a second range of values of the second key signal, said second range of values of the second key signal excluding said first range of values of the second key signal.
Claim 18
Independent Claim
95 words
A method of processing a video signal having a selected range of amplitudes within the active picture interval to provide an output signal, said method comprising: generating a second signal of which the amplitude is outside said selected range throughout the active picture interval, generating a key signal, and selecting the video signal as said output signal when the value of the key signal is within a first range and selecting the second signal as said output signal when the value of the key signal is within a second range that excludes the first range.
Claim 19
Independent Claim
95 words
A method of processing a video signal having a selected range of amplitudes within the active picture interval to provide an output signal, said method comprising: generating a second signal of which the amplitude is outside said selected range throughout the active picture interval, generating a key signal, and selecting the video signal as said output signal when the value of the key signal is within a first range and selecting the second signal as said output signal when the value of the key signal is within a second range that excludes the first range.
Claim 20
Dependent Claim
13 words
A method according to claim 16, further comprising spatially transforming the output signal.
Claim 21
Dependent Claim
29 words
A method according to claim 11, further comprising receiving the transformed output signal and generating a second key signal in response to the level of the transformed output signal.
Claim 22
Dependent Claim
28 words
A method according to claim 18, further comprising combining the transformed output signal with a further video signal in accordance with the value of the second key signal.
Claim 23
Independent Claim
175 words
A method of generating a video signal, comprising: employing a character generator to generate a first video signal having a selected range of amplitudes within the active picture interval, generating a second signal of which the amplitude is outside said selected range throughout the active picture interval, generating a first key signal, selecting the first video signal as an output signal when the value of the first key signal is within a first range and selecting the second signal as an output signal when the value of the first key signal is within a second range that excludes the first range, applying the output signal to a key generator that is responsive to the level of the signal received thereby, the key generator generating a second key signal having a first level when said output signal is within said second range and having a second level when said output signal is within said first range, and combining said output signal with a further video signal in accordance with the value of the second key signal.
Claim 24
Independent Claim
175 words
A method of generating a video signal, comprising: employing a character generator to generate a first video signal having a selected range of amplitudes within the active picture interval, generating a second signal of which the amplitude is outside said selected range throughout the active picture interval, generating a first key signal, selecting the first video signal as an output signal when the value of the first key signal is within a first range and selecting the second signal as an output signal when the value of the first key signal is within a second range that excludes the first range, applying the output signal to a key generator that is responsive to the level of the signal received thereby, the key generator generating a second key signal having a first level when said output signal is within said second range and having a second level when said output signal is within said first range, and combining said output signal with a further video signal in accordance with the value of the second key signal.
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) | 1994-07-08 | 1995-01-07 | 1995-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-08 | 1999-01-07 | 1999-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-08 | 2003-01-07 | 2003-07-09 | $7700.00 | Window Closed / Lapsed |