USB camera data transmission method and system

Abstract

The present invention provides a USB camera data transmission system and method. The data transmission system includes a USB camera, a first USB extension controller, a second USB extension controller, and a main control device; wherein, the first USB extension The controller is used for processing the first USB signal collected by the USB camera into a USB-like signal, and the second USB extension controller is used for processing the USB-like signal into a second USB signal. Since the USB-like signal is a strengthened signal, it can be transmitted to a distance of 100 meters through the network cable without affecting the normal transmission of the signal. And because the USB connection line supports online power supply, no special online power supply equipment is needed, compared with the USB signal extension solution in the prior art, the equipment cost is reduced.

Description

technical field [0001] The invention relates to the technical field of data transmission, and more specifically, to a data transmission method and system of a USB camera. Background technique [0002] Currently, USB cameras are widely used in the field of personal video. The interface of the USB camera is generally a USB2.0 interface. Since the USB signal strength is seriously attenuated during the transmission process, the distance for USB2.0 to transmit the USB camera signal is generally less than 5 meters. Due to the attenuation of the USB signal, the normal transmission of the USB signal may not be maintained beyond 5 meters. In order to be able to maintain the normal transmission of USB signals, the distance between the main control device and the USB camera is required to be no more than 5 meters, which limits the application of the USB camera in the field of long-distance transmission applications such as in the field of video surveillance. [0003] In order to prol...

AI Technical Summary

Problems solved by technology

More than 5 meters may not be able to maintain the normal transmission of the USB signal due to the attenuation of the USB signal

In order to maintain the normal transmission of USB signals, the distance between the main control device and the USB camera should not exceed 5 meters, which limits the application of the USB camera in the field of long-distance transmission applications such as in the field of video surveillance

[0003] In order to extend the transmission distance of the USB camera signal, the method of converting the USB signal into a network signal is adopted in the prior art, but this method requires a special power supply device to provide online power supply for the USB camera, which increases the cost of the device

And since the usual master control device generally has only one network interface, this method does not support multiple direct connections

Moreover, in some application fields such as car monitoring applications and scientific research image processing, the opencv software does not support network signals, so the method of converting USB signals into network signals has certain limitations.

[0004] In addition, the method of extending the transmission distance of USB signals by converting USB signals into network signals requires high bandwidth

If the network bandwidth of 100M is used to transmit high-definition image data, the transmission quality may be affected due to the small bandwidth

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