Mutlimedia System Issues

  The major differences between a multimedia application and a typical computer application are (although this distinction may be gettinn weeaker with time as many applications now involve multimedia):

• Media Types and their composition
• Relationship between the media (synchronisation)

There are several implications that need to concerned with mutlimedia systems and their delivery of data:

Quality of Service (Qos)

-- this is basically a collection of parameters that relate to a sequence as seen at the source and as seen at the destination of a multimedia presentation. This measure probably is tthe ultimate measure of a multimedia system. Four essential parameters are:

• Bandwidth -- capacity of the transfre mechanism between source and destination.
• Delay -- the time a multimedia unit spends in tranmission from sourse to destination.
• Delay Jitter -- Variation in delay delivery of data
• Loss Probability -- the ratio of units of information that an application can afford to lose.

Measuring the QoS?

-- how to reconise and quantify the QoS? How may the QoS be guaranteed?

Synchronising the data