Abstract: A KVM switch including server units that are respectively connected to computers units, user units that are respectively connected to input-output units inputting and outputting a signal to the computer units, and a main unit that connects the server units and the user units selectively. The input-output unit switches between the computer units where the signal is input and output. The server unit has a first reference signal generator that generates a first reference signal used for a distortion control of a picture signal. The main unit has a first controller receiving the first reference signal and controlling the distortion of the picture signal and a second reference signal generator generating a second reference signal used for the distortion control of the picture signal. The user unit has a second controller that receives the second reference signal and controls the distortion of the picture signal.

Abstract: A packet is transmitted from a transmitting device to an active communication device which transmits a reception history identifying the received packets to the transmitting device. The transmitting device transmits an active-mode request message to a standby communication device when having failed to receive the reception history from the active communication device within a predetermined time period. Then, the standby communication device becomes a new active communication device, and the active communication device becomes an old active communication device. The new active communication device transmits to the transmitting device a switching request message for switching a destination of the packet from the old active communication device to the new active communication device.

Abstract: An electronic apparatus includes a display, a display controller that displays an image on the display in accordance with an image signal input from outside, a first power supply unit that coverts an alternating-current power into a first power having a first voltage, and supplies the first power to the display, a shutoff unit that shuts off the alternating-current power being supplied to the first power supply unit, based on the image signal, and a second power supply unit that converts the alternating-current power into a second power having a second voltage, and supplies the second power to the display controller and the shutoff unit.

Abstract: A video signal adjustment system that is capable of being connected between a server and a console includes: a server unit that is connected to the server; a main unit that is connected to the server unit, and includes a first adjustment portion that adjusts gain and frequency characteristic of a video signal output from the server; and a console unit that is connected between the main unit and the console, and includes a second adjustment portion that adjusts gain, frequency characteristic, and delay of the video signal output from the main unit.

Abstract: A device including: a receiving unit receiving a packet; a packet determining unit determining whether the received packet is a head fragment packet or an intermediate or last fragment packet; a search control unit using search data registered previously for searching for packet information and search data used for identifying the same fragment of the fragment packet on the same search address; and an assembly processing unit assembling the fragment packets, wherein the search control unit extracts a fragment identifier from the head fragment packet and registers the fragment identifier as the search data on the same search address as the search address of the search data registered previously for searching for the packet information and extracts the fragment identifier of the intermediate fragment packet or the last fragment packet, makes a search in a way that uses the fragment identifier as search target data, and assembles the fragment packets.

Abstract: A signal transmission system includes a transmitting device and a receiving device. The transmitting device includes a superimposition portion that superimposes at least one synchronizing signal on at least one video signal among a plurality of video signals, and outputs the synchronizing signal and the video signal as a superimposition signal to a receiving device. The receiving device includes a separation portion that separates the superimposition signal into the synchronizing signal and the video signal, a first adjustment portion that adjusts an amount of delay of the separated video signal to another video signal, and a second adjustment portion that adjusts an amount of delay of the separated synchronizing signal.

Abstract: A selector that selectively makes connections between USB devices attached to a console side thereof and electronics devices connected to a host side thereof. The selector includes a USB host circuit controlling the USB devices, and USB device emulation circuits being respectively provided for the electronics devices and maintaining the connections with the electronics devices even while the USB devices are selectively being changed, and a control circuit coupling the USB host circuit and USB device emulation circuits.

Abstract: A KVM switch includes: server units respectively connected to computers; user units respectively connected to input/output devices for transmitting signals to the computers and receiving signals from the computers; and a main unit that connects the server units and the user units. Each of the server units, user units and main unit is a communication unit and includes: a first part communicating with another communication unit to inform the above another communication unit of unit type information about the communication unit and receive unit type information about the above another communication unit therefrom; and a second part controlling communications with the above another communication unit on the basis of the unit type information acquired from the above another communication unit.

Abstract: A KVM switch including server units that are respectively connected to computers units, user units that are respectively connected to input-output units inputting and outputting a signal to the computer units, and a main unit that connects the server units and the user units selectively. The input-output unit switches between the computer units where the signal is input and output. The server unit has a first reference signal generator that generates a first reference signal used for a distortion control of a picture signal. The main unit has a first controller receiving the first reference signal and controlling the distortion of the picture signal and a second reference signal generator generating a second reference signal used for the distortion control of the picture signal. The user unit has a second controller that receives the second reference signal and controls the distortion of the picture signal.

Abstract: A selector that selectively makes connections between USB devices attached to a console side thereof and electronics devices connected to a host side thereof. The selector includes a USB host circuit controlling the USB devices, and USB device emulation circuits being respectively provided for the electronics devices and maintaining the connections with the electronics devices even while the USB devices are selectively being changed, and a control circuit coupling the USB host circuit and USB device emulation circuits.