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Assignee: Avocent Corporation


Location: Huntsville, AL
No. of patents: 37

NumberTitleIssue Date
8134482Method and system for reducing multiple keystroke output
A method for reducing the erroneous display of multiple keystrokes on a target computer, that occur when depressing a key a single time on a Universal Serial Bus (USB) based keyboard from a remote computer. The invention eliminates the time lapse between the key pre...
03/13/2012
8031033Printed multilayer solenoid delay line having at least two sub-sets with different patterns
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). ...
10/04/2011
7925722Method and apparatus for discovery and installation of network devices through a network
A method and apparatus of discovering and installing managed appliances remotely using a protocol for communication on the network is described. The protocol permits a client workstation to issue a broadcast message on the network. The managed appliances will send a...
04/12/2011
7809058Video compression system
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...
10/05/2010
7783820Packet-switched split computer having disassociated peripheral controller and plural data buses
A network interface is described in which a single computer bus is split over a long distance into two or more intercommunicating buses. On one bus, processing and applications are provided and on the other remote bus, peripheral and local controllers are provided. ...
08/24/2010
7782961DVC delta commands
A video compression system compresses video frames comprising pixels defined by n-bit color values. Encoder of video compression system determines the difference between a current pixel value and a plurality reference pixel values. Encoder sends difference value to ...
08/24/2010
7738553Video compression system
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...
06/15/2010
7730243KVM switch system with a simplified external controller
A KVM switch system with external control functionality is described. A KVM switch is able to be controlled from an external device. The external device can either include a single button dedicated to controlling the desktop KVM switch or indicate a state of the KVM...
06/01/2010
7720146Video compression system
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...
05/18/2010
7643018Twisted pair communications line system
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 ...
01/05/2010
7640382Virtual media systems, methods and devices
In a KVM system, a system provides for USB devices to be accessed by target computers. A KVM switch connects a client with a target server via a network, the client computer having at least one device attached thereto. A second mechanism connects to a USB port of th...
12/29/2009
7590763Device for use in a system for processing keyboard, video and mouse signals
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 connecti...
09/15/2009
7555567Network based KVM switching system
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 addr...
06/30/2009
7551168Automatic equalization of video signals
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 compensat...
06/23/2009
7542509Video compression system
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...
06/02/2009
7515633Video compression system
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...
04/07/2009
7515632Video compression system
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...
04/07/2009
7512704Wireless computer system
A system and method of communicating keyboard, video and cursor control (or mouse) data from a plurality of servers to one or more client workstations through one or more keyboard, video, mouse (KVM) switches is disclosed. Wireless communication techniques are used ...
03/31/2009
7506041Secure management protocol
A method and apparatus for securely managing managed appliances such as keyboard/video/mouse (KVM) switches using a network communication protocol is described. A client workstation initiates a management session by establishing a secure sockets layer connection wit...
03/17/2009
7457461Video compression noise immunity
A method of improving run length video encoding commands is described in which all compression commands that require a current pixel value to be compared to a previously sent pixel value to determine whether compression can take place in a longer run is adjusted to ...
11/25/2008
7424551Passive video multiplexing method and apparatus priority to prior provisional application
A passive video multiplexing method and apparatus for encoding video synchronization signals within a KVM extension system. A Rack Interface Pod (RIP) is provided for receiving video signals from a network server and providing them to a remote user via a local area ...
09/09/2008
7418524Universal serial bus (USB) extension
A universal serial bus (USB) extension allows for the transmission of data at high speeds over a much greater distance than typical USB operating range. USB devices may be connected to host computers at distances of 750 meters or more. USB tokens from a host compute...
08/26/2008
7336839Digital video compression command priority
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 pixe...
02/26/2008
7321623Video compression system
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...
01/22/2008
7275953Wire comb
A wire comb for mounting individual wires from multi-wire cables onto circuit boards that is mounted adjacent one or more ends of a circuit board to permit the individual wires to be spaced apart yet held in place during an over molding process; and to permit connec...
10/02/2007
7272180Video compression system
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...
09/18/2007
7229310Circuit board assembly with wire comb
An approach 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 ...
06/12/2007
7221389Automatic equalization of video signals
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 compensat...
05/22/2007
7206348Twisted pair communications line system
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 ...
04/17/2007
7189103Wire comb overlying spark gap
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 s...
03/13/2007
7062596Self-synchronizing half duplex matrix switch
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-...
06/13/2006
7006700Digital video compression command priority
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 pixe...
02/28/2006
6807639Split computer architecture to separate user and processor while retaining original user interface
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....
10/19/2004
6681250Network based KVM switching system
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 t...
01/20/2004
6671756KVM switch having a uniprocessor that accomodate multiple users and multiple computers
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 fe...
12/30/2003
6378009KVM (keyboard, video, and mouse) switch having a network interface circuit coupled to an external network and communicating in accordance with a standard network protocol
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 whe...
04/23/2002
6256014Mouse ranking system for multiple users
A multi-user KVM switch system is disclosed in which the KVM switch utilizes a pre-determined routine to determine which types of mice are connected to the KVM switch user ports. When the multiple mice communicate with a common computer via the KVM switch...
07/03/2001
 
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