Patent EP0404393A2 successfully refreshed from Google Patents.
EP0404393A2
Expired / Lapsed
EP
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Video digitising/display adapter
Assignee: International Business Machines Corp
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Filing: 1990-06-07
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Granted: —
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Expires: 2010-06-07
Abstract
Abstract A video digitising and display adapter for use with a personal computer. Analog video data input in a plurality of formats including composite video, RGB, and Y/C video are received by the adapter and digitised. Subsequent conversion back to analog form results in a video image output for simultaneous display in the composite video, RGB, and Y/C video formats or combinations thereof. Microcomputer control of the adapter permits selection of the particular input format video signal selected from the multiformat inputs as well as the particular combination of different video output format signals made available by the adapter.
Inventors
- 👤 David Stanley Cwynar
- 👤 John Elton Ferguson
- 👤 Barry Dean Kline
- 👤 Charles Leslie Peek
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 19:21
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/40; H04N21/41; H04N21/414; H04N21/4143; G; G06; G06F; G06F3/00; G06F3/14; G09; G09G; G09G1/00; G09G1/06; G09G1/14; G09G1/16; H04N9/00; H04N9/64; H04N9/641; G09G2360/00; G09G2360/02; G09G5/00; G09G5/36; G09G5/363
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
71 words
Apparatus for use with a digital computer having a bus structure in the capturing and displaying of video images, comprising input connector means for simultaneously receiving a plurality of video input signals each in a correspondingly different video signal format; and switch means interconnected to the connector means for selecting different ones of the video signals in functional response to a selection signal impressed on the bus structure by the computer.
Claim 2
Dependent Claim
71 words
Apparatus for use with a digital computer having a bus structure in the capturing and displaying of video images, comprising input connector means for simultaneously receiving a plurality of video input signals each in a correspondingly different video signal format; and switch means interconnected to the connector means for selecting different ones of the video signals in functional response to a selection signal impressed on the bus structure by the computer.
Claim 3
Dependent Claim
40 words
Apparatus as claimed in Claim 1 comprising analog-to-digital conversion means for digitising the selected signal; and means for re-converting the digitised signal to a simultaneous plurality of analog video output signals each in a correspondingly different video output signal format.
Claim 4
Dependent Claim
14 words
Apparatus as claimed in Claim 2 wherein the re-conversion means includes a digital-to-analog converter.
Claim 5
Dependent Claim
56 words
Apparatus as claimed in any preceding claim wherein the input connector means comprises a first input connector means for receiving a first video signal in a first of the video formats; and a second input connector means for receiving a second video signal in either of a plurality of video formats different from the first format.
Claim 6
Dependent Claim
28 words
Apparatus as claimed in any preceding claim in the form of an adapter card having a connector adapted for releasable interconnection to the bus structure of the computer.
Claim 7
Dependent Claim
27 words
Apparatus as claimed in Claim 5 wherein the adapter card comprises a plurality of output connectors each carrying a different one of the analog video output signals.
Claim 8
Dependent Claim
30 words
Apparatus as claimed in any preceding claim comprising means for detecting each of a plurality of different format input sync signals associated with respective ones of the video input signals.
Claim 9
Dependent Claim
32 words
Apparatus as claimed in Claim 7 comprising switching means for selecting one of the input sync signals in functional response to the selection signal impressed on the bus structure by the computer.
Claim 10
Dependent Claim
28 words
Apparatus as claimed in Claim 8 comprising phase lock loop means responsive sequentially to differing ones of the input sync signals as a function of the selection signal.
Claim 11
Dependent Claim
24 words
Apparatus as claimed in any preceding claim wherein the video formats are selected from a group including Y/C, RGB, composite video, and other formats.
Claim 12
Dependent Claim
11 words
A digital computer comprising apparatus as claimed in any preceding claim.
Claim 13
Independent Claim
61 words
A method for operating a digital computer having a bus structure to capture and display video images, the method comprising the steps of simultaneously receiving a plurality of video input signals each in a correspondingly different video signal format; and pre-selecting different ones of the video signals in functional response to a selection signal delivered onto the bus by the computer.
Claim 14
Independent Claim
61 words
A method for operating a digital computer having a bus structure to capture and display video images, the method comprising the steps of simultaneously receiving a plurality of video input signals each in a correspondingly different video signal format; and pre-selecting different ones of the video signals in functional response to a selection signal delivered onto the bus by the computer.
Claim 15
Dependent Claim
37 words
A method as claimed in Claim 12 comprising the steps of digitising the pre-selected signals; and re-converting the digitised signals to a simultaneous plurality of analog video output signals each in a correspondingly different video signal format.
Claim 16
Dependent Claim
40 words
A method as claimed in Claim 12 or Claim 13 comprising the step of pre-selecting a next one of the video signals in functional response to a next one of the selection signals delivered onto the bus by the computer.
Claim 17
Dependent Claim
59 words
A method as claimed in Claim 14 comprising the steps of detecting sync pulses from a first of the video input signals; generating phase lock loop sync pulses from the detected sync pulses; and wherein the pre-selection of the next one of the video signals is at a time and functional relationship to the phase lock loop sync pulses.
Claim 18
Independent Claim
29 words
A method as claimed in any of Claims 12 to 15 wherein the video signal formats are selected from the group including composite video, Y/C, RGB, and other formats.
Claim 19
Independent Claim
50 words
A method as claimed in any of Claims 12 to 16 wherein the received video signals include a plurality of different format input sync signals; and wherein the pre-selecting one of the input video signals includes pre-selecting one of the input sync signals in functional response to the selection signal.
Claim 20
Independent Claim
75 words
A method as claimed in any of Claims 12 to 17 wherein the video input signals are delivered upon a plurality of input lines; and wherein a first video input signal having one of the formats is imposed on a corresponding one of the lines; and further wherein either of a pair of second video input signals each having a correspondingly different one of the formats is delivered on a second one of the lines.
Claim 21
Dependent Claim
30 words
A method as claimed in Claim 18 wherein the pre-selected one of the video signals comprises either the first video input signal or one of the second video input signals.
Claim 22
Independent Claim
35 words
A method as claimed in any of Claims 12 to 19 comprising the step of simultaneously displaying visual images each as a function of a different one of the plurality of analog video output signals.
Claim 23
Independent Claim
36 words
A method as claimed in any of Claims 12 to 20 wherein a cursor is superimposed on the digitised pre-selected signals as a function of a cursor control signal delivered onto the bus by the computer.
References Cited (Backward Citations)
No citation records indexed.
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