Abstract: A printed solenoid inductor delay line system comprises discrete delay sections, where the inductor is implemented in the form of a printed, spiraling solenoid, with the solenoid axis in the plane of the multi-layer printed circuit board (PCB).

Abstract: A video compensation system for analog video transmission is described. The compensation system is employed in an analog video switching circuit such that each time a conductive path is switched, the system automatically tests the new switch path for a new compensation value. The compensation value is determined by measuring the response of the new path to a set of tones that are applied to the conductive path, the response to which is measured against a table of responses previously recorded. The measured responses are compared to the recorded responses to determine an appropriate compensation control voltage, which is applied to an equalizer system. In an alternative embodiment, the skew compensations also provided between red, green, and blue twisted pair lines in the cables by performing comparative analysis between corresponding pairs of the red, green, and blue signals.

Abstract: A transmission system for transmitting analog color video signals wherein a cable comprising multiple twisted pairs is employed, and certain of these pairs are coupled to carry selected color signals as a function of the delay provided by particular twist rates. In certain instances, selected signal delay devices are connected in circuit with certain twisted pairs. By such an arrangement, it has been found that relatively long distances between a computer and monitor may be spanned by relatively low-cost, twisted pair cable commonly used for telephone communications.

Abstract: An approach is provided for mounting individual wires from multi-wire cables onto circuit boards. A wire comb is mounted adjacent one or more ends of the circuit board to permit a way to space apart individual wires, to hold them in place; and to permit welding or soldering of the wires to the appropriate connections or the circuit board during an overmolding process.

Abstract: A video compression encoder which does not require a video frame buffer is disclosed. Without a frame buffer, incoming pixels can not be compared to pixels previously sent to the decoder. Instead, the disclosed encoder only stores check values for groups of pixels sent. If a group's check value has not changed, the encoder sends a command to the decoder not to change that pixel group. Also, without a frame buffer, an incoming video frame can not be captured and later sent to the decoder as network throughput permits. Instead, if throughput is insufficient to send an encoded group of pixels, the encoder leaves the check value for that group unchanged and sends a command instructing the decoder not to change those pixels. This defers updating that group until the next screen update is sent to the decoder. Grouping of pixels can be done in any fashion, for example; a group can be a single video line, a portion of a line, multiple lines or screen rectangles containing portions of multiple lines.

Abstract: A video compression system is disclosed that is optimized to take advantage of the types of redundancies typically occurring on computer screens and the types of video loss acceptable to real time interactive computer users. It automatically adapts to a wide variety of changing network bandwidth conditions and can accommodate any video resolution and an unlimited number of colors. The disclosed video compression encoder can be implemented with either hardware or software and it compresses the source video into a series of data packets that are a fixed length of 8 bits or more. Sequences of one or more of these packets create unique encoding “commands” that can be sent over any network and easily decoded (decompressed) with either software or hardware. The commands include 3 dimensional copying (horizontal, vertical and time) and unique efficiencies for screen segments that are comprised of only two colors (such as text).

Abstract: A video compression system is disclosed that is optimized to take advantage of the types of redundancies typically occurring on computer screens and the types of video loss acceptable to real time interactive computer users. It automatically adapts to a wide variety of changing network bandwidth conditions and can accommodate any video resolution and an unlimited number of colors. The disclosed video compression encoder can be implemented with either hardware or software and it compresses the source video into a series of data packets that are a fixed length of 8 bits or more. Sequences of one or more of these packets create unique encoding “commands” that can be sent over any network and easily decoded (decompressed) with either software or hardware. The commands include 3 dimensional copying (horizontal, vertical and time) and unique efficiencies for screen segments that are comprised of only two colors (such as text).

Abstract: A video compression system is disclosed that is optimized to take advantage of the types of redundancies typically occurring on computer screens and the types of video loss acceptable to real time interactive computer users. It automatically adapts to a wide variety of changing network bandwidth conditions and can accommodate any video resolution and an unlimited number of colors. The disclosed video compression encoder can be implemented with either hardware or software and it compresses the source video into a series of data packets that are a fixed length of 8 bits or more. Sequences of one or more of these packets create unique encoding “commands” that can be sent over any network and easily decoded (decompressed) with either software or hardware. The commands include 3 dimensional copying (horizontal, vertical and time) and unique efficiencies for screen segments that are comprised of only two colors (such as text).

Abstract: A video compression system is disclosed that is optimized to take advantage of the types of redundancies typically occurring on computer screens and the types of video loss acceptable to real time interactive computer users. It automatically adapts to a wide variety of changing network bandwidth conditions and can accommodate any video resolution and an unlimited number of colors. The disclosed video compression encoder can be implemented with either hardware or software and it compresses the source video into a series of data packets that are a fixed length of 8 bits or more. Sequences of one or more of these packets create unique encoding “commands” that can be sent over any network and easily decoded (decompressed) with either software or hardware. The commands include 3 dimensional copying (horizontal, vertical and time) and unique efficiencies for screen segments that are comprised of only two colors (such as text).

Abstract: A video compression encoder which does not require a video frame buffer is disclosed. Without a frame buffer, incoming pixels can not be compared to pixels previously sent to the decoder. Instead, the disclosed encoder only stores check values for groups of pixels sent. If a group's check value has not changed, the encoder sends a command to the decoder not to change that pixel group. Also, without a frame buffer, an incoming video frame can not be captured and later sent to the decoder as network throughput permits. Instead, if throughput is insufficient to send an encoded group of pixels, the encoder leaves the check value for that group unchanged and sends a command instructing the decoder not to change those pixels. This defers updating that group until the next screen update is sent to the decoder. Grouping of pixels can be done in any fashion, for example; a group can be a single video line, a portion of a line, multiple lines or screen rectangles containing portions of multiple lines.

Abstract: A datalink for a system of N computers, and M monitors and peripheral devices is described. Separate state machines are provided for each switched computer, and separate state machines for each switched workstation, with a non-intrusive matrix switch disposed there-between. The matrix switch routes the peripheral data streams without intercepting them with a processor. The computer-side state machines and the workstation-side state machines are in a master/slave relationship, respectively, and communicate peripheral data using a half-duplex method of transfer.

Abstract: A video compensation system for analog video transmission is described. The compensation system is employed in an analog video switching circuit such that each time a conductive path is switched, the system automatically tests the new switch path for a new compensation value. The compensation value is determined by measuring the response of the new path to a set of tones that are applied to the conductive path, the response to which is measured against a table of responses previously recorded. The measured responses are compared to the recorded responses to determine an appropriate compensation control voltage, which is applied to an equalizer system. In an alternative embodiment, the skew compensations also provided between red, green, and blue twisted pair lines in the cables by performing comparative analysis between corresponding pairs of the red, green, and blue signals.

Abstract: A video compression system for compressing a stream of digital video data is disclosed. Known run-length encoding is applied whenever possible to the digital video data stream. When a run is not identified, the encoder determines whether a consecutive series of pixels are identified from only two different colors, and if so creates a make-series command to create bytes with bits encoded as a stream of binary values corresponding to the two pixel colors as they occur in the consecutive series. The make series command continues for as many bytes as the consecutive series of bits will fill, except that, when a make series command applies again to a byte of make-series bits, the make series command is preempted by the applicable run length encoding.

Abstract: A video compression system for compressing a stream of digital video data is disclosed. Known run-length encoding is applied whenever possible to the digital video data stream. When a run is not identified, the encoder determines whether a consecutive series of pixels are identified from only two different colors, and if so creates a make-series command to create bytes with bits encoded as a stream of binary values corresponding to the two pixel colors as they occur in the consecutive series. The make series command continues for as many bytes as the consecutive series of bits will fill, except that, when a make series command applies again to a byte of make-series bits, the make series command is preempted by the applicable run length encoding.

Abstract: A computer interface device includes circuitry enclosed in a housing; a first cable electrically connected to the circuitry and integral with the housing; a video port connection plug electrically connected to the circuitry via the first cable; a mouse port connection plug electrically connected to the circuitry via a path through the housing of the video port connection plug; and a keyboard connection plug electrically connected to the circuitry via a path through the housing of the video port connection plug.

Abstract: A framework for supporting the display of information includes at least one server; and one or more network virtual computers (NVCs) connected to the at least one server, each NVC also connected to a respective information display device. Each NVC is constructed and adapted to obtain video commands from the at least one server connected thereto, to decode the video commands; and to render information corresponding to the decoded commands on the information display device connected thereto. The commands may be HTML commands and the NVC decodes and renders the HTML commands. The server may include a screen-scraping mechanism to preprocess content, prior to sending it to a connected NVC, by converting the content to a generic file format such as MPEG or AVI.

Abstract: A network interface is described in which a single computer bus is split over a long distance into two or more inter-communicating buses. On one bus, processing and applications are provided and on the other remote bus, peripheral and local controllers are provided. The buses communicate through a series of: bridge, FPGA, FPGA and bridge. Between the FPGAs, a communication path provides long distance communication.

Abstract: A keyboard/video/mouse (KVM) switching protocol is disclosed in which KVM information is applied to a network of workstations. At least one data converter communicates on the workstation network and retrieves KVM information from the workstation network that is addressed to a server assigned to the converter. The converter places the KVM information in a format suitable to the assigned server and applies the converted KVM information to the appropriate standard device ports of the server. The system provides motherboard access to the servers that is characteristics of KVM switches but provides essentially unlimited scalability not known in traditional KVM switches.

Abstract: A KVM switch having a uniprocessor architecture that accommodate multiple users and multiple computers—even multiple users to a single computer—via interrupt servicing provides dramatic improvements over common matrix-type KVM switches. Further, such features as hot-plugging computers, and keep alive computers (during power outages) are not inhibited by the present architecture. OSD menuing is accommodated, even as to both users, and OSD configurations are field upgradeable using flash memory downloading. The present architecture also accommodates tiered arrangements.

Abstract: An apparatus, method, and system for providing control, status, and security functions in a peripheral switch for connecting one or more computers to one or more user stations. Information from a remote terminal is transferred on a network in a packet where the switch information in the packet uses a standardized management protocol. When the packet is received by a network interface card in the peripheral switch the switch information is translated to a proprietary protocol. The peripheral switch then responds to the switch information by performing a control function, providing status information to the remote terminal, or by changing security information. In addition to the transfer of peripheral information from the remote terminal, the peripheral switch is capable of transferring switch information from one of the user stations.