A device for prolonging the distance between computer mainframe and man-machine interface equipment

Abstract

The invention discloses a device and method for prolonging the distance between a computer host and human-machine interface equipment. The device comprises a far end device, a near end device and a transmission cable. The far end device comprises a video sending device and a distance prolonging device of a far end universal serial bus. The near end device comprises a video receiving device and a distance prolonging device of a near end universal serial bus. A video signal is transmitted to the video receiving device in a single direction through the video sending device after being compressed through the intraframe static image compression algorithm. A serial video signal is transmitted through one or two or three video transmission channels by selecting one of the video sending device and the video receiving device. By means of the device and method for prolonging the distance between the computer host and the human-machine interface equipment, data in the USB format sent by the computer host and the human-machine interface equipment are converted into serial data suitable for being transmitted in the long-distance cable, and the transmission distance is prolonged.

Description

technical field [0001] The invention relates to a device for extending the distance between a computer mainframe and a human-machine interface device, in particular to a device for transmitting video signals and USB data using a long-distance cable between the mainframe and the human-machine interface device to increase the number of host computers and human-machine interface devices. distance technology. Background technique [0002] At present, the distance between the mainframe of the computer and human-machine interface devices such as monitors, mice, keyboards, and cameras is relatively short, generally within two or three meters. In some applications, based on the consideration of security or easy maintenance, it is necessary to place the host computer and the human-machine interface device in different physical spaces, so that the distance between the host computer and the human-machine interface device needs to be increased. The bandwidth required to transmit uncomp...

AI Technical Summary

Problems solved by technology

The limitation of transmission distance restricts the application of USB interface standard to a certain extent

To sum up, there is currently a lack of an effective long-distance video and USB data transmission solution between the host computer and the human-machine interface device, which can not only transmit video over long distances with low latency, but also transmit data over long distances. Transmit USB data, exceeding the maximum length of 5 meters between USB devices stipulated in the USB standard

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