The Digital Fact Book - Quantel

Switch (network)Connecting network users via a switch means that each can be sending or receiving dataat the same time with the full wire-speed of the network available. This is made possibleby the aggregate capacity of the switch. So, for example, an eight-port Gigabit Ethernetswitch will have an aggregate capacity of 8 Gb/s. This means many simultaneous high-speedtransactions taking place without interruption from other users. The Internet is connectedby thousands of very high speed network switches.See also: CSMA/CD, HubSXRDSilicon X-tal (crystal) Reflective Display, a reflective liquid crystal micro-display from Sonyused in the first commercially available 4K-sized projectors. The display chip has 4096 x 2160pixels on one-and-a-half inches of silicon. The design maintains a uniform, ultra-thin liquidcrystal cell gap without any spacers in the image area – contributing to contrast performance,claimed as 4000:1. Its Vertically Aligned Nematic (VAN) liquid crystal changes state fastenabling speeds up to 200 f/s while minimizing image smear. HDTV-sized SXRD chips arealready used in Sony consumer products, including a front projector and rear projectiontelevisions up to 70 inches.See also: Projectors (digital)Synchronous (data transfer)This carries separate timing information (clock data) for keeping send and receive operationsin step. The data bits are sent at a fixed rate so transfer times are guaranteed but transfersuse more resources (than asynchronous) as they cannot be shared. Applications includenative television connections, live video streaming and SDI. Operation depends on initialnegotiation at send and receive ends but transfer is relatively fast.SSee: Asynchronous, Isochronous, SDI165