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Ross Video Vision 4 at Current TV Kahuna video switcher made by Snell Limited company presented at IBC 2010. A vision mixer is a device used to select between different live video sources and, in some cases, compositing live video sources together to create visual effects.
Two video matrix units in a rack. A video router, also known as a video matrix switch or SDI router, is an electronic switch designed to route video signals from multiple input sources such as cameras, VT/DDR, computers and DVD players, to one or more display devices, such as monitors, projectors, and TVs.
A vision mixer, a large control panel used to select the multiple-camera setup and other various sources to be recorded or seen on air and, in many cases, in any video monitors on the set. The term "vision mixer" is primarily used in Europe, while the term "video switcher" is usually used in North America. [1]
The company's first generation of switchers was the RVS family. The RVS 16–4, the first switcher made, [5] was followed closely by the RVS 10-4 (a 16–4 with 10 video inputs). The first downstream keyer (DSK) could be added to the 10-4 to allow the addition of more video layers.
Generator locking can be used to synchronize as few as two isolated sources (e.g., a television camera and a videotape machine feeding a vision mixer (production switcher)), or in a wider facility where all the video sources are locked to a single synchronizing pulse generator (e.g., a fast-paced sporting event featuring multiple cameras and recording devices).
The video switcher keeps track of which video sources are selected by the technical director and output to the main program bus. A switch automatically closes the appropriate electrical contacts to create a circuit, which activates the tally unit located in the camera control units (CCU).