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The USB video device class (also USB video class or UVC) is a USB device class that describes devices capable of streaming video like webcams, digital camcorders, transcoders, analog video converters and still-image cameras.
Several generic digital data connection standards are designed to carry audio/video data along with other data and power: USB was designed as a single connector to support all needs, including any generic data, audio/video, power, and more; DisplayLink is its most successful Audio+Video protocol. Until the 3.0 revision, very low data rates ...
These schemes combined VGA or digital video, audio, FireWire, and USB signals into a single connector. Deprecated. Made obsolete by DFP and later DVI. HDI-45: Apple proprietary. Combines Analog VGA out, stereo analog audio out, analog microphone in, S-video capture in, Apple desktop bus interface.
The DL-41xx series came out in 2013. It is a USB 3.0 to LVDS device, supporting DL3 compression and HDCP 2.0 encryption. [26] It is designed to be embedded into monitors to enable USB as a video input on displays. It is described as a low-power device, which enables it to be powered from the USB bus without the need for an external power supply.
Video4Linux (V4L for short) is a collection of device drivers and an API for supporting realtime video capture on Linux systems. [1] It supports USB webcams, TV tuners, CSI cameras, and related devices, standardizing their output, so programmers can easily add video support to their applications.
The standard supports the simultaneous transfer of data (at least USB 2.0, and depending on video resolution: USB 3.1 Gen 1 or 2) and power charging (up to 40 W via USB Power Delivery), in addition to MHL audio/video. [2] This allows the connection to be used with mobile docks, allowing devices to connect to other peripherals while charging ...
Such devices can use an external power supply, which is allowed by the standard, or use a dual-input USB cable, one input of which is for power and data transfer, the other solely for power, which makes the device a non-standard USB device. Some USB ports and external hubs can, in practice, supply more power to USB devices than required by the ...
Input signal conditioner that buffers the analog video input signal to protect downstream circuitry; Video decoder that converts SD analog video (e.g., NTSC, SECAM, PAL) or HD analog video (e.g., AHD, HD-TVI, HD-CVI) to a digital format; Digital frame grabbers, which accept and process digital video streams, include these circuits: