Wireless Communications – Wi-Fi vs Bluetooth
Bluetooth is a wireless technology standard for exchanging data across short distances. The devices used by Bluetooth are telephones, tablets, media players. Wi-Fi allows an electronic device to exchange data wirelessly over a computer network.
Bus Communications – Firewire vs USB
Firewire is a very fast external bus that supports data transfer rates of up to 400 Mbps. Products supporting the 1394 standard go under different names, depending on the company. Apple, which originally developed the technology, uses the trademarked name Firewire. USB is short for Universal Serial Bus, an external bus standard that supports data transfer rates of 12 Mbps. A single USB port can be used to connect up to 127 peripheral devices, such as mice, modems and keyboard.
2 terrabyte hard disk drive might be found inside a new PC. External hard disk drives offer around 1 terrabyte.
CDs and DVDs have been a common means of storing multimedia data. Around 2 hours of video can be stored on a DVD. The amount of video can be stored on a Blu-Ray DVD depends on the bit rate but is around 9 hours.
Cloud storage is a model of networked online storage where data is stored on multiple virtual servers, generally hosted by third parties. Companies need only pay for the storage they actually use. Storing extremely large volumes of information on a local area network (LAN) is expensive. It doesn’t require installation, doesn’t need replacing, has backup and recovery systems, has no physical presence, requires no environmental conditions, requires no personnel and doesn’t require energy for power or cooling. However has several major drawbacks, including performance, availability, incompatible interfaces and lack of standards.
The processor has to manage the main tasks involved in any multimedia development, therefore the faster a processor the better.
The type of output device used can have an impact on multimedia. Virtual 3D provides a separate image for each eye, generally requires 3D glasses where as Real 3D – projects a moving image into space