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Typically, each frame is transmitted uncompressed in RGB or YUV or compressed as JPEG.
Some cameras, such as mobile-phone cameras, use a CMOS sensor with supporting electronics "on die", i.e.
the sensor and the support electronics are built on a single silicon chip to save space and manufacturing costs.
Most webcams feature built-in microphones to make video calling and videoconferencing more convenient. The USB video device class (UVC) specification allows inter-connectivity of webcams to computers without the need for proprietary device drivers.
Most if not all cheap webcams come with built-it ASIC to do video compression in real-time.Improved video quality has helped webcams encroach on traditional video conferencing systems.New features such as automatic lighting controls, real-time enhancements (retouching, wrinkle smoothing and vertical stretch), automatic face tracking and autofocus, assist users by providing substantial ease-of-use, further increasing the popularity of webcams.As a camera system's depth of field is greater for small image formats and is greater for lenses with a large f-number (small aperture), the systems used in webcams have a sufficiently large depth of field that the use of a fixed-focus lens does not impact image sharpness to a great extent.Most models use simple, focal-free optics (fixed focus, factory-set for the usual distance from the monitor to which it is fastened to the user) or manual focus.