1. History of Data Transmission-Form USB to FireWire
FireWire 400-to speed USB1.1 interface beyond the traditional 30-fold over, has become the gold
standard for high-speed data transmission. Apple is the first FireWire applied to the entire product
line computer manufacturer. And now, Apple has introduced a very forward-looking manner IEEE
1394b standard, FireWire 800, the data transfer rate in the original standards has increased two-
fold. The new 17-inch PowerBook G4 come equipped with FireWire 800.
FireWire VS. USB
FireWire and USB are on the computer and consumer electronics industry establishes its own
position. The computer mouse, keyboards and other low-bandwidth input devices only usually use
USB technology. The ExpressCard FireWire Card has a higher bandwidth, longer transmission
distance, as well as a stronger power supply bus, so more suitable for those digital cameras (DV),
professional audio, hard drives, high-end digital cameras and other home entertainment
equipment, etc. applications.
FireWire is the fastest growing developed high-speed data transmission standard, the technology
most suitable for use in digital audio and video and other multimedia devices and external hard
drives and other high-speed peripheral. For the effective bandwidth of USB2.0 interface 2 times
more than the FireWire 800, data transfer rates of up to 800 Mbps. This means that you can
transmit more than one every 10 seconds kinds of CD-capacity data.
FireWire 400 data transfer through the farthest from the cable up to 4.5 meters. FireWire 800 since
the use of a professional standard glass optical fiber, the data transmission across the 100 meters.
Therefore, an analogy, you can in 10 seconds, handed out a CD full of data throw pitches so far. In
addition, in order to receive this transmission distance, you do not need to purchase a new
computer or other equipment. As long as both devices are connected to a FireWire 800 hub, you
can, through super-efficient glass fiber to connect them. This means that you can press gallery
with Apple Computer controlled digital camera in the scene; or in a room where, with multiple
Apple to build a top-level digital audio production studios and recording equipment can be placed
in another one the room between the two without time delay through the cables connected. If you
are using USB/Firewire ExpressCard, in a number of cables needed to connect long-distance
applications, such as studio and studio, with its only 5 meters effective distance, significantly
affected the scope of application of USB 2.0, there is no useless.
The advantages of FireWire 800
FireWire advantages can be summarized into three words: high-speed, high-speed, or speed.
800Mbps, the effective bandwidth 2 times more than USB2.0 interface, it is a high-speed storage
and video capture the best choice. FireWire 800 is higher than a lot of speed USB 2.0 makes
2. FireWire is more suitable for video and graphics such as the need for bandwidth-intensive
applications, because they usually have to consume hundreds of each file and even a few gigabits
of data. For example, one-hour DV format video files consume approximately 13GB. There are
also other advantages:
Efficient architecture: IEEE 1394 ExpressCard priority arbiter can to reduce delays, while the
8B10B encoding reduces signal distortion and increase throughput. (For more detailed
information, please refer to the Technical Summary)
A better user experience: No matter how you connect the device together, FireWire 800 can
work effectively. In fact, you can even loop your FireWire 800 to Apple Computer, to increase the
real-time operation of redundancy.
Backwards compatibility: manufacturers are already widely used in many devices, a FireWire
interface, such as DV cameras, hard drives, digital cameras, professional audio equipment.
Pioneering features
Inexpensive but high quality, built-in FireWire interface, DV camera, and Apple's honor product
Final Cut Pro, and iMovie video editing software, combined together, allows you to create desktop
computer with a broadcast-quality video movie . FireWire 800 to share the FireWire 400 following
ground-breaking features:
Flexible connectivity options: A single bus can connect up to 63 computers or other devices - you
can even be shared between two Apple a camera.
Real-time data transmission: Audio and video applications the key point is that they are not
allowed delays and frame the wrong order, while the FireWire can guarantee the synchronization
of data transmission.
Bus-powered: USB 2.0 ExpressCard can provide 2.5W of power - This is like the mouse-like
device is slow enough. While the FireWire device need to provide up to 45W of power, to support
the frequent hard disk drive operation and quick charge. That is why the iPod's data cable and
power lines are integrated into a connection on the reasons.
Plug and Play. Simply connect one device, it can work properly. In the Mac OS X, connected to a
DV camera will be able to start after the iMovie, and the ExpressCard Firewire will be able to start
the iPod after iTunes, and automatically sync with your music library.
More Refere:
http://www.espow.com/wholesale-computers-networking-computer-accessories-
expresscard-and-cardbus.html
