i power multimedia technology technologies. higher usb the universal serial bus is a means of...
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I Power
Multimedia Technology
Technologies
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USB The Universal Serial Bus is a means of
connecting external devices such as scanners, keyboards, mice to a PC port.
Key Features: Fast transfer rate: 12 Mbps for fast devices
and 1.5Mbps for keyboards and mice. You can connect many devices at once: Daisy
Chaining. No need to configure new equipment. Simply
plug and play
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USB (Cont.) USB2
This is an improved
version of USB which has three operating speeds:
1.5, 12 and 480 Mbps.
USB Connection
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Firewire IEEE 1394 Used for connecting audio/visual and multimedia
applications like digital camcorders, digital cameras and digital TV equipment, music systems.
Key Features: High speed up to a max of 800Mbps (1.6 and 3.2
Gbps versions are under development). It is capable of delivering the speeds needed to
support the handling and transmitting of multimedia data.
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Firewire IEEE 1394 (Cont.)
Using fibre-optic cables, firewire 800 can send data at 800 Mbps over distances if 100 meters.
It supports up to 63 devices by daisy chaining on the one connection.
Key Features:It can handle compressed video, digitised audio and system commands on the common bus simultaneously.
Firewire Connection
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Wireless Communications WiFi
WiFi networks use radiotechnologies.This wireless technology can be used to connect computers to each other to for a LAN, the internet, even to a wired LAN.Can connect wireless printers, servers, notebooks, PDA’s and Desktops.Available in two speeds, 11Mbps and 54Mbps.
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Bluetooth Bluetooth is a short range wireless
transmission system used for: Mobile phones PDA’s Printers Keyboard / Mouse Modems
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Bluetooth Adaptor
Bluetooth (Cont.) Key Parameters:
Range: 10 meters or 100 meters with a booster. Speed: 720 kbps (a 10Mbps version is planned) Data can be exchanged by up to eight devices
simultaneously.
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Developments in Technology You need to know about developments in
storage technology. Particular attention should be paid to:
Decreasing size and price. Increasing capacity.
Examples should be taken from optical magnetic, optical and holographic technologies.
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Holographic Storage CDs, DVDs and magnetic storage all store
bits of information on the surface of a recording medium.
Scientists are now working on a new optical storage method, called holographic memory, that will go beneath the surface and use the volume of the recording medium for storage, instead of only the surface area.
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Holographic Storage (Cont.) Three-dimensional data storage will be
able to store more information in a smaller space and offer faster data transfer times.
Holographic memory offers the possibility of storing 1 terabyte (TB) of data in a sugar-cube-sized crystal.
A terabyte of data equals 1,024 gigabytes.
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Real 3-D display The old standard way of achieving 3-D display is
using a pair of special glasses. Emerging technologies don’t require these. Spatial 3-D display technology uses a rotating
projection lens to create an image that appears to occupy 3-D space in a transparent dome.
This is a high end technology designed for specialist use and is very expensive.
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Virtual 3-D displays These are 3-D displays that have been developed
for use with virtual reality systems. They usually use a variation on goggles or a
helmet that has two monitors producing the 3-D effect.
They can be relatively inexpensive.
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3-D flat panel displays Flat panel displays are being developed to
produce a 3-D image. One version uses ‘Parallax illumination’. This involves:
Creating two slightly different images of the same data;
Directing these images to two separate regions so that each eye receives different data, fooling the brain into seeing one 3-D display.
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Who uses 3-D displays? At present they are used by people working
on: Creating and using simulations; Research projects; Image processing.
Eventually this technology will be commercially available to us all and 3-D displays will be common place.