Digitális Videokamera
-
#126
FireWire characteristics
Hot-pluggable — you don't have to turn off your storage system or computer to connect or disconnect it, and you don't even need to restart your computer.
FireWire-A max raw data rate is 400Mbps (50MB/sec); typical sustained transfer rate is about 40MB/sec. FireWire-B doubles these rates.
FireWire-A is about 30 times faster than USB 1.1 (Universal Serial Bus), and about the same speed as USB 2.0 Hi-Speed. FireWire-B is about 60 times faster than USB 1.1, and about twice as fast as USB 2.0 HS.
Supports up to 63 devices per bus. A typical bus will have between two and perhaps a dozen devices.
Hubs are available to provide "tree" layouts in addition to the more common "daisy-chain".
Cable lengths can extend up to 14 feet (4.5 meters) between devices.
Cables are easy to connect and you don't need device IDs or terminators.
FireWire-A vs. USB 2.0 Hi-Speed
Even though USB 2.0 Hi-Speed has a theoretical max raw data rate slightly higher than FireWire (480 Mbps vs. 400 Mbps), the typical sustained transfer rates are about the same, because FireWire is a more efficient protocol to use in audio and video environments. In fact, in most cases, FireWire beats USB 2.0 Hi-Speed, albeit by a small margin. Very often it will be the computer or hard drive mechanism which limits the system performance more than the interface, so you might see about the same performance using FireWire-A or USB 2.0.
Szal annyira nem rossz az USB.