18-08-2012, 01:26 PM
Multimedia Networks
Multimedia.ppt (Size: 542.5 KB / Downloads: 20)
Multimedia-Definitions
Multi many; much; multiple
Medium An intervening substance through which something is transmitted or carried on.
What Is Multimedia
animation and video that is delivered by computer.
When you allow the user to control what and when these elements are delivered, it is interactive multimedia.
The Presentation Medium
Refer to the tools and devices for the input and output of information.
Through which medium the information is delivered to the computer.
The Transmission medium
Characterizes different information carriers that enable continuous data transfer.
How the information is transmitted?
network.
wire and cable transmission -coaxial cable, fiber optics.
wireless ->airspace
Isochronous Transmission
Isochronous transmission
is designed to provide steady bit flow for multimedia applications
Delivering such data at a steady rate is essential
because variations in delay known as jitter can disrupt reception (cause pops or clicks in audio/make video freeze for a short time)
For example, an isochronous mechanism designed to transfer voice operates at a rate of 64,000 bits per second
A sender must generate digitized audio continuously
A receiver must be able to accept and play the stream