WO1997008625B1 - Computer interconnection system - Google Patents
Computer interconnection systemInfo
- Publication number
- WO1997008625B1 WO1997008625B1 PCT/US1996/013772 US9613772W WO9708625B1 WO 1997008625 B1 WO1997008625 B1 WO 1997008625B1 US 9613772 W US9613772 W US 9613772W WO 9708625 B1 WO9708625 B1 WO 9708625B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signals
- workstation
- remotely located
- video signals
- video
- Prior art date
Links
- 230000003750 conditioning Effects 0.000 claims abstract 36
- 230000001808 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
Abstract
A computerized switching system for coupling a workstation to a remotely located computer. A signal conditioning unit receives keyboard and mouse signals generated by a workstation and generates a data packet which is transmitted to a central crosspoint switch. The packet is routed through a crosspoint switch to another signal conditioning unit located at a remotely located computer. The second signal conditioning unit applies the keyboard and mouse commands to the keyboard and mouse connectors of the computer as if the keyboard and mouse were directly coupled to the remote computer. Video signals produced by the remote computer are transmitted through the crosspoint switch to the workstation. Horizontal and vertical sync signals are encoded on to the video signals to reduce the number of cables that extend between the workstation and the remote computer. The signal conditioning units connected to the workstations include an onscreen programming circuit that produces menus for the user on a video display of the workstation.
Claims
AMENDED CLAIMS
[received by the International Bureau on 20 March 1997 (20.03.97); new claims 9-27 added; remaining claims unchanged (11 pages)]
9. A system for connecting a workstation of the type that includes a keyboard, a cursor control device, and a video monitor to a number of remotely located computers, comprising: a central programmable switch for connecting signals received on a number of inputs to a number of outputs; a first signal conditioning circuit for receiving signals produced by the keyboard and cursor control device of the workstation and for transmitting the keyboard and cursor control device signals to an input of the central switch, the first signal conditioning circuit also including an on-screen programming circuit that produces overlaid video signals on the video monitor of the workstation, means for detecting keyboard and cursor control device signals entered in response to the overlaid video signals, and means for transmitting the keyboard and cursor control signal entered in response to the overlaid video signals to the central switch in order to control the operation ofthe central switch; and a second signal conditioning circuit coupled to the remotely located computers for receiving the keyboard and cursor control device signals from an output ofthe central switch and for supplying the keyboard and cursor control signals to the remote computer.
10. The system of Claim 9, wherein the second signal conditioning circuit receives video signals produced by the remote computer system and transmits the video signals to the central switch which routes the video signals to the first signal conditioning unit, wherein the first signal conditioning unit receives the video signals from the central switch and applies the video signals to the video monitor of the workstation.
11. The system of Claim 10, wherein the video signals produced by the remote computer include a red, green and blue video signal as well as a horizontal and vertical sync signal, and wherein the second signal conditioning circuit includes an encoder circuit that encodes the horizontal and vertical sync signals onto two of the red, green or blue video signals before the video signals are transmitted to the central switch.
12. The system of Claim 11, wherein the video signals include a mode signal that indicates a proper polarity of the horizontal and vertical sync signal, and
wherein the encoder circuit encodes the mode signal onto one of the red, green or blue video signals before the video signals are transmitted to the central switch.
13. The system of Claim 12, wherein the first signal con ditioning unit includes a decoder circuit for removing the horizontal and vertical sync signals from the red, green or blue video signals.
14. The system of Claim 13, wherein the decoder circuit removes the mode signal from the red, green or blue video signals.
15. The system of Claim 14, wherein the decoder circuit includes a circuit for adjusting the horizontal and vertical sync signals based on the decoded mode signal.
16. A system for connecting a workstation of the type that includes a keyboard, a cursor control device and a video monitor to one or more remotely located computers, comprising: a programmable switch for routing keyboard and cursor control device signals received from the workstation to a remotely located computer and for routing video signals produced by the remotely located computer to the workstation; a first signal conditioning circuit for receiving the keyboard and cursor control device signals produced at the workstation and for transmitting the keyboard and cursor control device signals to the programmable switch, the first signal conditioning circuit also including: an on-screen programming circuit that receives horizontal and vertical synchronize signals and produces overlaid video signals on the video monitor ofthe workstation; a signal generator that generates internal horizontal and vertical synchronize signals; a synchronize switch coupled to receive the internal horizontal and vertical synchronize signals produced by the signal generator and external horizontal and vertical synchronize signals received from the remotely located computer, the switch operating to select either the internal or external horizontal and vertical synchronize signals to be supplied to the on-screen programming circuit;
means for detecting keyboard and cursor control device signals entered in response to the overlaid video signals;
means for transmitting the keyboard and cursor control device signals entered in response to the overlaid signals to the programmable switch in order to control the operation ofthe programmable switch; and
a second signal conditioning circuit coupled to the remotely located computer for receiving the keyboard and cursor control device signals transmitted from the programmable switch and for supplying the keyboard and cursor control device signals to the remotely located computer, the second signal conditioning circuit also receiving video signals produced by the remotely located computer and transmitting the video signals to the programmable switch.
17. The system of Claim 16, further comprising:
a synchronize polarizer circuit that receives the internal or extemal horizontal and vertical synchronize signals selected by the synchronize switch and converts the selected horizontal and vertical synchronize signals to active-low logic levels.
18. The system of Claim 16, further comprising:
a first and second set of buffer circuits, the first set of buffer circuits having inputs coupled to receive the video signals produced by the remotely located computer and outputs coupled to the video monitor ofthe workstation, the second set of buffer circuits having inputs coupled to receive the overlaid video signals produced by the on-screen programming circuit;
a control logic circuit that enables the first and second set sets of buffer circuits so that the video signals supplied to the video monitor of the workstation are either the video signals produced by the remotely located computer, the overlaid video signals produced by the on-screen programming circuit or both the video signals produced by the remotely located computer and overlaid video signals produced by the on-screen programming circuit.
19. A system for connecting a workstation of the type that includes a keyboard, a cursor control device and a video monitor to one or more remotely located computers, comprising:
a programmable switch for routing keyboard and cursor control device signals received from the workstation to a remotely located computer and for routing video signals produced by the remotely located computer to the workstation;
a first signal conditioning circuit for receiving the keyboard and cursor control device signals produced at the workstation and for transmitting the keyboard and cursor control device signals to the programmable switch, the first signal conditioning circuit also including: an on-screen programming circuit that receives horizontal and vertical synchronize signals and that produces overlaid video signals on the video monitor of the workstation; a signal generator that generates internal horizontal and vertical synchronize signals; a synchronize switch coupled to receive the internal horizontal and vertical synchronize signals produced by the signal generator and external horizontal and vertical synchronize signals produced by a remotely located computer, the switch operating to select either the internal or external horizontal and vertical synchronize signals to be supplied to the on-screen programming circuit; a synchronize polarizer circuit that receives the internal or external horizontal or vertical synchronize signals selected by the synchronize switch and converts the selected horizontal and vertical synchronize signals to active-low logic levels;
means for detecting keyboard and cursor control device signals entered in response to the overlaid video signals;
means for transmitting the keyboard and cursor control device signals entered in response to the overlaid video signals to the programmable switch in order to control the operation ofthe programmable switch; and
a second signal conditioning circuit coupled to the remotely located computer for receiving the keyboard and cursor control device signals transmitted from the programmable switch and for supplying the keyboard and cursor control device signals to the remotely located computer, the second signal conditioning circuit also receiving video signals produced by the remotely located computer and transmitting the video signals to the programmable switch.
20. A system for connecting a workstation of the type that includes a keyboard, a cursor control device and a video monitor to at least one remotely located computer comprising:
a programmable switch for routing signals from said keyboard and cursor control device to said remotely located computer and for routing video signals produced by the remotely located computer to the workstation;
a first signal conditioning circuit for receiving the keyboard and cursor control device signals produced at the workstation and for transmitting the keyboard and cursor control device signals to the programmable switch, the first signal conditioning circuit also including: an on-screen programming circuit that receives horizontal and vertical synchronize signals and produces overlaid video signals on the video monitor ofthe workstation, a signal generator that generates internal horizontal and vertical synchronize signals; a synchronize switch coupled to receive the internal horizontal and vertical synchronize signals produced by the signal generator and external horizontal and vertical synchronize signal produced by the remotely located computer, the switch operating to select either the internal or external horizontal and vertical synchronize signals to be supplied to the on-screen programming circuit; a synchronize polarizer circuit that receives the internal or external horizontal and vertical synchronize signals selected by the synchronize switch and converts the selected horizontal and vertical synchronize signals to active-low logic levels; a first and second set of buffer circuits, the first set of buffer circuits having inputs coupled to receive the video signals produced by the remotely located computer and outputs coupled to the video monitor of the workstation, the second set of buffer circuits having inputs coupled to receive the overlaid video signals produced by the on-screen programming circuit and outputs coupled to the video monitor ofthe workstation;
a control logic circuit that enables the first and second set sets of buffer circuits so that the video signals supplied to the video monitor of the workstation are either the video signals produced by the remotely located computer,
the overlaid video signals produced by the on-screen programming circuit or both the video signals produced by the remotely located computer and the overlaid video signals produced by on-screen programming circuit;
means for detecting keyboard and cursor control device signals entered in response to the overlaid video signals;
means for transmitting the keyboard and cursor control device signals entered in response to the overlaid video signals to the programmable switch in order to control the operation ofthe programmable switch; and
a second signal conditioning circuit coupled to the remotely located computer for receiving the keyboard and cursor control device signals transmitted from the programmable switch and for supplying the keyboard and cursor control signals to the remotely located computer, the second signal conditioning circuit also receiving video signal produced by the remotely located computer and transmitting the video signals to the programmable switch.
21. In combination;
a workstation of the type that includes a keyboard, a cursor control device and a video monitor;
at least one remotely located computer,
a programmable switch for routing signals received from the workstation to the remotely located computer and for routing video signals produced by the remotely located computer to the workstation;
a first signal conditioning circuit for receiving the signals produced at the workstation and for transmitting the signals to the programmable switch, the first signal conditioning circuit also including: an on-screen programming circuit that receives horizontal and vertical synchronize signals and produces overlaid video signals on the video monitor ofthe workstation; a signal generator that generates internal horizontal and vertical synchronize signals;
a synchronize switch coupled to receive the internal horizontal and vertical synchronize signals produced by the signal generator and external horizontal and vertical synchronize signals received from the remotely located computer, the switch operating to select either the internal or external horizontal and vertical synchronize signals to be supplied to the on-screen programming circuit;
means for detecting signals from the workstation in response to the overlaid video signals;
means for transmitting the signals entered in response to the overlaid signals to the programmable switch in order to control the operation of the programmable switch; and
a second signal conditioning circuit coupled to the remotely located computer for receiving the signals transmitted from the programmable switch and for supplying the signals to the remotely located computer, the second signal conditioning circuit also receiving video signals produced by the remotely located computer and transmitting the video signals to the programmable switch.
22. The system of Claim 21 , further comprising :
a synchronize polarizer circuit that receives the internal or external horizontal and vertical synchronize signals selected by the synchronize switch and converts the selected horizontal and vertical synchronize signals to active-low logic levels.
23. The system of Claim 21, further comprising:
a first and second set of buffer circuits, the first set of buffer circuits having inputs coupled to receive the video signals produced by the remotely located computer and outputs coupled to the video monitor ofthe workstation, the second set of buffer circuits having inputs coupled to receive the overlaid video signals produced by the on-screen programming circuit;
a control logic circuit that enables the first and second set sets of buffer circuits so that the video signals supplied to the video monitor of the workstation are either the video signals produced by the remotely located computer, the overlaid video signals produced by the on-screen programming circuit or both the
video signals produced by the remotely located computer and overlaid video signals produced by the on-screen programming circuit.
24. In combination:
a workstation of the type that includes a keyboard, a cursor control device and a video monitor;
at least one remotely located computer;
a programmable switch for routing signals received from the workstation to the remotely located computer and for routing video signals produced by the remotely located computer to the workstation;
a first signal conditioning circuit for receiving the signals produced at the workstation and for transmitting the signals to the programmable switch, the first signal conditioning circuit also including: an on-screen programming circuit that receives horizontal and vertical synchronize signals and that produces overlaid video signals on the video monitor of the workstation; a signal generator that generates internal horizontal and vertical synchronize signals; a synchronize switch coupled to receive the internal horizontal and vertical synchronize signals produced by the signal generator and external horizontal and vertical synchronize signals produced by the remotely located computer, the switch operating to select either the internal or external horizontal and vertical synchronize signals to be supplied to the on-screen programming circuit; a synchronize polarizer circuit that receives the internal or external horizontal and vertical synchronize signals selected by the synchronize switch and converts the selected horizontal and vertical synchronize signals to active-low logic levels;
means for detecting signals from the workstation that are produced in response to the overlaid video signals;
means for transmitting the signals produced in response to the overlaid video signals to the programmable switch in order to control the operation of the programmable switch; and
a second signal conditioning circuit coupled to the remotely located computer for receiving the signals transmitted from the programmable switch and for supplying the signals to the remotely located computer, the second signal conditioning circuit also receiving video signals produced by the remotely located computer and transmitting the video signals to the programmable switch.
25. In combination:
a workstation of the type that includes a keyboard, a cursor control device and a video monitor;
at least one remotely located computer;
a programmable switch for routing signals received from the workstation to the remotely located computer and for routing video signals produced by the remotely located computer to the workstation;
a first signal conditioning circuit for receiving the signals produced at the workstation and for transmitting the signals to the programmable switch, the first signal conditioning circuit also including: an on-screen programming circuit that receives horizontal and vertical synchronize signals and produces overlaid video signals on the video monitor ofthe workstation, a signal generator that generates internal horizontal and vertical synchronize signals; a synchronize switch coupled to receive the internal horizontal and vertical synchronize signals produced by the signal generator and extemal horizontal and vertical synchronize signal produced by the remotely located computer, the switch operating to select either the internal or extemal horizontal and vertical synchronize signals to be supplied to the on-screen programming circuit; a synchronize polarizer circuit that receives the internal or extemal horizontal and vertical synchronize signals selected by the synchronize switch
30
and converts the selected horizontal and vertical synchronize signals to active-low logic levels; a first and second set of buffer circuits, the first set of buffer circuits having inputs coupled to receive the video signals produced by the remotely located computer and outputs coupled to the video monitor of the workstation, the second set of buffer circuits having inputs coupled to receive the overlaid video signals produced by the on-screen programming circuit and outputs coupled to the video monitor ofthe workstation;
a control logic circuit that enables the first and second set sets of buffer circuits so that the video signals supplied to the video monitor of the workstation are either the video signals produced by the remotely located computer, the overlaid video signals produced by the on-screen programming circuit or both the video signals produced by the remotely located computer and the overlaid video signals produced by on-screen programming circuit;
means for detecting signals produced at the workstation in response to the overlaid video signals;
means for transmitting the signals produced in response to the overlaid video signals to the programmable switch in order to control the operation of the programmable switch; and
a second signal conditioning circuit coupled to the remotely located computer for receiving the signals transmitted from the programmable switch and for supplying the signals to the remotely located computer, the second signal conditioning circuit also receiving video signal produced by the remotely located computer and transmitting the video signals to the programmable switch.
26. A circuit for producing video signals over video signals that are produced by a remote computer, comprising:
a signal generator that produces internal horizontal and vertical synchronize signals;
a synchronize switch coupled to receive the internal horizontal and vertical synchronize signals produced by the signal generator and exte al horizontal
31
and vertical synchronize signals produced by the remote computer, the synchronize switch selecting either the internal or external horizontal and vertical synchronize signals;
an on-screen programming circuit that receives the selected internal or extemal horizontal and vertical synchronize signals and produces overlaid video signals.
27. The circuit further including:
a first and second set of buffer circuits, the first set of buffer circuits having inputs coupled to receive the video signals produced by the remotely located computer and outputs coupled to a video monitor of a workstation, the second set of buffer circuits having inputs coupled to receive the video signals produced by the on¬ screen programming circuit and outputs coupled to the video monitor of the workstation; and
a control logic circuit that enables the first and/or the second sets of buffer circuits so that the video signals supplied to the video monitor of the workstation are either the video signals produced by the remote computer, the video signals produced by the on-screen programming circuit, or both the video signals produced by the remote computer and the on-screen programming circuit.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69620615T DE69620615T2 (en) | 1995-08-25 | 1996-08-22 | COMPUTER CONNECTION SYSTEM |
AU71530/96A AU702823C (en) | 1995-08-25 | 1996-08-22 | Computer interconnection system |
IL12214296A IL122142A (en) | 1995-08-25 | 1996-08-22 | Computer interconnection system |
CA002221106A CA2221106C (en) | 1995-08-25 | 1996-08-22 | An interconnection system for viewing and controlling remote server computers |
AT96932938T ATE216101T1 (en) | 1995-08-25 | 1996-08-22 | COMPUTER CONNECTION SYSTEM |
EP96932938A EP0846292B1 (en) | 1995-08-25 | 1996-08-22 | Computer interconnection system |
JP51052397A JP3412823B2 (en) | 1995-08-25 | 1996-08-22 | Computer connection system |
NO980703A NO980703L (en) | 1995-08-25 | 1998-02-19 | Computer connection system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/519,193 US5721842A (en) | 1995-08-25 | 1995-08-25 | Interconnection system for viewing and controlling remotely connected computers with on-screen video overlay for controlling of the interconnection switch |
US08/519,193 | 1995-08-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1997008625A1 WO1997008625A1 (en) | 1997-03-06 |
WO1997008625B1 true WO1997008625B1 (en) | 1997-04-24 |
Family
ID=24067271
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1996/013772 WO1997008625A1 (en) | 1995-08-25 | 1996-08-22 | Computer interconnection system |
Country Status (11)
Country | Link |
---|---|
US (8) | US5721842A (en) |
EP (2) | EP0846292B1 (en) |
JP (2) | JP3412823B2 (en) |
KR (1) | KR19990022233A (en) |
CN (1) | CN1194044A (en) |
AT (1) | ATE216101T1 (en) |
CA (1) | CA2221106C (en) |
DE (1) | DE69620615T2 (en) |
IL (1) | IL122142A (en) |
NO (1) | NO980703L (en) |
WO (1) | WO1997008625A1 (en) |
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1995
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1996
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- 1996-08-22 WO PCT/US1996/013772 patent/WO1997008625A1/en active IP Right Grant
- 1996-08-22 KR KR1019970708712A patent/KR19990022233A/en not_active Application Discontinuation
- 1996-08-22 EP EP96932938A patent/EP0846292B1/en not_active Expired - Lifetime
- 1996-08-22 DE DE69620615T patent/DE69620615T2/en not_active Expired - Lifetime
- 1996-08-22 JP JP51052397A patent/JP3412823B2/en not_active Expired - Lifetime
- 1996-08-22 CN CN96196525A patent/CN1194044A/en active Pending
- 1996-08-22 AT AT96932938T patent/ATE216101T1/en not_active IP Right Cessation
- 1996-08-22 CA CA002221106A patent/CA2221106C/en not_active Expired - Lifetime
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1997
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1998
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1999
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2000
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2002
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2003
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2005
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2010
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