Multimedia on the Web

Notes for presentation given on 16th September 2003 as part of the Web Information Systems course.

Requirements for MM on the Web

Multimedia

Combination of different media in a single presentation. Even better, in a timed presentation including links (termed hypermedia or time-based hypermedia or interactive multimedia).

Web languages

XML etc. (as described in previous weeks). Need to define a particular application language. This needs processing tools. Need to specify what the elements in the language mean. For example, BNF of time specification in SMIL, e.g. the clipBegin attribute.

• W3C application languages:XHTML, MathML, and SMIL.

SMIL

• CWI SMIL page
• An older tutorial (in pdf) which shows alternatives for ways of specifying temporal and spatial layout.
• SMIL 4 hour tutorial Note that this needs to be viewed in Internet Explorer Version 6.0 or newer. (Displayed on 16th using Version 6.0.2800.1106.)
  To run this XHTML+SMIL-encoded tutorial, do the following:
  1. Make sure the window content display is active by clicking on it.
  2. Press alt-space to focus on the next link.
  3. Press return to trigger the next link.
  4. By default, the focus stays on the next link. From now on, all you should need to do is press return to go to the next slide. If this stops working, repeat steps 1 and 2.
  5. To return to the first slide, reload the document by pressing F5.
  6. The second sheet has hyperlinks to sheets throughout the presentation. Clicking on these will remove the focus from the next link, so you will need to repeat steps 1 and 2 to go further.
• Publications about SMIL