In view of these challenges the National
Centre for Accessible Media (NCAM) has developed
a free software tool called the Media Access
Generator (MAGPIE) (http://www.washington.
edu/access). This software allows for multimedia
specialists, publishing companies and service
providers to add captions, subtitles and audio
descriptions to their work. The essence of
accessibility to assistive technology is therefore to
strive to make all web content accessible regardless
of the file format.