Video router
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A Video router' or Matrix are used for transporting video signals from sources or inputs to output destinations.
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[edit] Inputs and outputs
The number of inputs and outputs varies dramatically. Routers are normally described by number of inputs by number of outputs e.g. 2x1, 256x256. Some video routers, by the use of additional drop in cards, allow the system to be expanded for more inputs or outputs, or to support other formats.
[edit] Signals
The signal format that the router transports can be anything from analogue composite video using PAL and NTSC. Also Broadband routers can route more than one Digital video signal format, Serial Digital Interface (SDI), HD-SDI, component video. Some routers have the ability to internally convert digital to analog and analog to digital.
[edit] Crosspoints
Because any of the source can be routed to any destination, the internal arrangement of the router is arranged as a number of crosspoints which can be activated to pass the corresponding source signal to the desired destination.
[edit] Control
Many type of broadcast automation systems can be used to control a video router via IP, or serial communications such as the RS-422 9-Pin Protocol.
[edit] Manufacturers
- Ross Video
- Blackmagic Design
- Datavideo
- Ampex
- Evertz Microsystems
- Harris Corporation (formerly Leitch)
- Miranda Technologies (NVision)
- Nevion
- PESA Switching Systems
- Snell (Pro-Bel)
- Thomson Grass Valley
- Sony
- Utah Scientific
- Matrix Switch Corporation
