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EP0239243A2
Expired / Lapsed
EP
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A digital effects loop for video switchers
Assignee: Ampex Systems Corp
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Filing: 1987-02-24
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Granted: —
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Expires: 2007-02-24
Abstract
Abstract A digital effects loop (50) is inserted in the video and key signal buses which extend to a mixer (16) of a switcher apparatus, and an image transformation unit (52) is coupled to the loop. Means are included in the loop to interrupt the particular bus or buses (21,23,26,28) and the signal or signals are re-routed to provide inputs to the digital effects unit. The unit (52) supplies transformed video and/or key signals back to the continuation of the respective interrupted bus or buses, and thence to the mixer to be used thereby in place of the original signals.
Inventors
- 👤 Jay L. Flora
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 19:43
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N5/268
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
73 words
A video switcher comprising a source (20) of video signals, a keyer (14) coupled to the video source and arranged to provide insert video and key signals and a mixer (16) arranged to receive signals from the source and the keyer, characterised in that a video effects device (52) is provided within the switcher to receive selectively signals from the source or keyer and to supply a transformed signal back to the mixer.
Claim 2
Dependent Claim
73 words
A video switcher comprising a source (20) of video signals, a keyer (14) coupled to the video source and arranged to provide insert video and key signals and a mixer (16) arranged to receive signals from the source and the keyer, characterised in that a video effects device (52) is provided within the switcher to receive selectively signals from the source or keyer and to supply a transformed signal back to the mixer.
Claim 3
Dependent Claim
64 words
A video switcher according to claim 1 in which the video effects device is part of a loop (50, 52) which can be switchably connected into signal paths extending from the source and keyer to the mixer whereby signals otherwised destined for the mixer are diverted through the video effects device (52) and rerouted back to the mixer after being processed by said device.
Claim 4
Dependent Claim
43 words
A video switcher according to claim 2 in which the source and keyer provide signals for the mixer on respective buses (12,23; 26,28) and the loop includes switches for selectively interrupting the buses whereby respective signals are rerouted via the video effects device.
Claim 5
Dependent Claim
51 words
A video switcher according to claim 3 in which the loop includes connector lines (83,81) coupled to the video effects device from the respective buses at locations before the interrupting switches, and connector lines (132-138) coupled from the video effects device back to the buses at locations after the interrupting switches.
Claim 6
Dependent Claim
18 words
A video switcher according to claim 4 in which the said lines are switchably connected to respective buses.
Claim 7
Dependent Claim
23 words
A video switcher according to claim 5 in which the video effects devices is arranged to receive selectively other video or key signals.
Claim 8
Dependent Claim
30 words
A video switcher according to claims 5 and 6 in which connector lines (83) coupled to the video devices can be connected to dedicated video and key input buses (84,86).
Claim 9
Dependent Claim
41 words
A video switcher according to any foregoing claims and including a pattern generator (18), there being means (202) for connecting a key signal from the video effects device to the mixer in place of a pattern signal from the pattern generator.
Claim 10
Dependent Claim
100 words
A video switcher according to claim 8 and arranged for generating a wipe effect, a first switchable connector line (83) coupling a video source signal to the said dedicated video input bus (84); a second switchable connector line (133) coupling the resulting output signal from the video effects device to the mixer to replace the video source signal; switch means (68) disposed to interrupt passage of the video source signal directly to the mixer; and a third switchable connector line (199) supplying a resulting key signal to the mixer for use by the mixer in place of the pattern signal.
Claim 11
Dependent Claim
122 words
A system according to claim 8 and arranged for generating a key effect via the switcher; a first switchable connector line (83) coupling an insert video signal to the video effects device; a second switchable connector line (81) coupling a key signal to the video effects device; a third switchable connector line (133) coupling a video output signal from the video effects device back to the mixer to replace the insert video signal thereto; a fourth switchable connector line (135) coupling an output key signal from the video effects device back to the mixer to replace the key signal thereto; and switch means (76,78,156,112) being disposed to interrupt passage of the insert video signal and the key signal directly to the mixer.
Claim 12
Independent Claim
121 words
A system for generating digital effects via a video switcher having a signal source (20), a keyer (14), a mixer (16), video source signal buses (21,23) extending between the video source and the mixer and video and key buses (26,28) extending between the keyer and the mixer, characterised by a digital effects loop (50) inserted within the video source signal buses and the video and key signal buses which extend to the mixer; and a digital effects unit (52) arranged to be coupled to one selected signal bus via the digital effects loop for supplying a transformed video output signal back to the selected signal bus extending to the mixer and for supplying an associated output signal key to the mixer.
Claim 13
Independent Claim
121 words
A system for generating digital effects via a video switcher having a signal source (20), a keyer (14), a mixer (16), video source signal buses (21,23) extending between the video source and the mixer and video and key buses (26,28) extending between the keyer and the mixer, characterised by a digital effects loop (50) inserted within the video source signal buses and the video and key signal buses which extend to the mixer; and a digital effects unit (52) arranged to be coupled to one selected signal bus via the digital effects loop for supplying a transformed video output signal back to the selected signal bus extending to the mixer and for supplying an associated output signal key to the mixer.
Claim 14
Independent Claim
78 words
A method for adding digital effects to the effects generated by a video switcher, comprising supplying selected video source, insert video and key signals; interrupting at least one of the selected video, insert video and key signals; re-routing the at least one interrupted signal; generating digital effects video and key output signals from the at least one re-routed signal; and selectively returning the digital effects video and key output signals to replace the original interrupted signal or signals.
Claim 15
Independent Claim
78 words
A method for adding digital effects to the effects generated by a video switcher, comprising supplying selected video source, insert video and key signals; interrupting at least one of the selected video, insert video and key signals; re-routing the at least one interrupted signal; generating digital effects video and key output signals from the at least one re-routed signal; and selectively returning the digital effects video and key output signals to replace the original interrupted signal or signals.
Claim 16
Independent Claim
109 words
A method for adding digital effects to the effects generated by a video switcher, comprising supplying selected video source, insert video and key signals internally within the switcher; re-routing at least one of the video signals within the switcher to provide an input signal to a digital effects generating means; supplying a digitally transformed video output signal from the digital effects generating means commensurate with the desired added digital effect; supplying an associated key signal commensurate with the desired digital effect; and applying the digitally transformed video output signal and the key signal in place of the at least one video signal to provide the desired added digital effect.
Claim 17
Independent Claim
109 words
A method for adding digital effects to the effects generated by a video switcher, comprising supplying selected video source, insert video and key signals internally within the switcher; re-routing at least one of the video signals within the switcher to provide an input signal to a digital effects generating means; supplying a digitally transformed video output signal from the digital effects generating means commensurate with the desired added digital effect; supplying an associated key signal commensurate with the desired digital effect; and applying the digitally transformed video output signal and the key signal in place of the at least one video signal to provide the desired added digital effect.
References Cited (Backward Citations)
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