The composition of USB cameras
2020-02-25
As a video input device, USB camera can be called a computer camera, a computer eye, etc., which has been widely used in video conferencing, telemedicine and real-time monitoring in the past. Nowadays, the continuous progress of network technology, the continuous improvement of social technology, coupled with the maturity of photosensitive imaging device technology and a large number of cameras are used in the manufacture of cameras, which makes its price fall to a level that ordinary people can afford. Ordinary people can also talk and communicate with each other on the Internet through cameras, and people can also use it for various popular digital images and audio-visual processing.
For the classification of USB cameras, cameras are divided into two categories: digital camera type and analog camera type. The analog type converts the analog video signal generated by the video capture device into a digital signal and stores it in a computer. The captured video signal must be converted to digital mode by a specific video capture card and compressed before it can be converted to a computer. The digital type captures the image directly and then transmits it to the computer via a string, port, or USB port. At present, the computer market is dominated by digital cameras, and the digital type is dominated by USB cameras that use new data transmission interfaces . There is also a product that can use a video capture card, but it is not yet mainstream.
Due to the rapid popularization of personal computers, analog cameras and other reasons, the comprehensive cost of the higher transmission rate of the USB interface is much higher than that of the serial port and the parallel port, so the current market hotspot is mainly the USB interface of the digital camera.
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