System and method for accessing and operating personal computers remotely
First Claim
1. A circuit module for a computer having in operation therein a remote access engine to communicate between a host server and a remote workstation, including:
- video buffer circuits to receive, respectively, red, green and blue analog video signals from the host server;
sync polarity circuits to receive, respectively, horizontal and vertical sync signals from the host server;
analog to digital converters communicating with the video buffer circuits to receive the red, green and blue analog video signals and convert them to digital video signals;
a phase locked loop video dot clock circuit communicating with the sync polarity circuits and outputting a dot clock signal; and
a video processing circuit, including a cpu and a programmable gate array, connected to the sync polarity circuits, and the phase locked loop video dot clock circuit to automatically determine a graphics mode of the red, green and blue analog video signals.
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Accused Products
Abstract
A remote access device is disclosed for capturing, digitizing and communicating video signals from a host computer to a remote computer. The remote computer returns keyboard and mouse signals through the remote access device to the host computer to control the host computer as though the remote keyboard and mouse were directly connected to the host computer. The remote access device includes a circuit module interface for the host computer that allows the remote access device to operate independently of any operating system characteristics associated with the host computer.
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Citations
8 Claims
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1. A circuit module for a computer having in operation therein a remote access engine to communicate between a host server and a remote workstation, including:
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video buffer circuits to receive, respectively, red, green and blue analog video signals from the host server; sync polarity circuits to receive, respectively, horizontal and vertical sync signals from the host server; analog to digital converters communicating with the video buffer circuits to receive the red, green and blue analog video signals and convert them to digital video signals; a phase locked loop video dot clock circuit communicating with the sync polarity circuits and outputting a dot clock signal; and a video processing circuit, including a cpu and a programmable gate array, connected to the sync polarity circuits, and the phase locked loop video dot clock circuit to automatically determine a graphics mode of the red, green and blue analog video signals. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A circuit for communicating RGB video information, corresponding to RGB analog video signals, from a Host computer to a remote computer via a network link, comprising:
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video input circuitry to receive the RGB video information from the Host computer; video processing circuitry to digitize the RGB video information and to decode a video format of the RGB video information received by the video input circuitry; and a flash palette converter circuit, including; an address mux receiving the digitized RGB video information as a stream of digital RGB pixel data; a flash palette converter RAM being addressed by the stream of digital RGB pixel data and outputting for each RGB pixel a palette index byte corresponding to a color value of said RGB pixel; wherein the video processing circuitry automatically determines a graphics mode of the RGB analog video signals.
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Specification