Timed Text refers to the presentation of text media in synchrony with other media, such as audio and video.Typical applications of timed text are the real time subtitling of foreign-language movies on the Web, captioning for people lacking audio devices or having hearing impairments, karaoke, scrolling news items or teleprompter applications.
Timed text for MPEG-4 movies and cellphone media is specified in MPEG-4 Part 17, and is also referred to by RFC 3839.
The W3C is developing a Timed Text (TT) specification that covers many aspects of timed
Writing SMIL can in some ways make accessibility seem more difficult. For questions, this web page is helpful. Here is a bit on what they have to say about text timing:
"27.4.5.1. Time containers
Media elements are placed in special time container elements (<par>, <seq>, and <excl>) that define how the media should be played. The <par> element (short for "parallel") defines a group of elements that play at the same time. The <seq> element defines a sequence of elements that play one after another, in the order in
"Audio and video podcasts are not accessible to deaf (audio) or blind (video) individuals. Accessibility of emerging technologies is always an issue that I try to deal with early on in the process of rolling it out. Being at a diverse university, and it is highly important that all that my team does be usable and accessible. We set up a usability testing lab last year and incorporated accessibility testing equipment/software as well. We run our web sites and applications through rigorous testing, but what to do with podcasts?
There are a couple ways
"For frame based animation, we will stack our animation frames vertically, and some sizes related to height should be defined in pixels, that's not condsidered good in terms of accessibility indeed as Internet Explorer users cannot change the sizes of fonts defined in pixels, but we need it for the simplicity of the tutorial. Stacking frames horizontally and setting the vertical positions to 50% would be "awesome", but Opera has a bug I'll explain later.
However, it is still possible to compensate for different sizes of text in animation with few
Jim Thather provides many tutorials at his web site, but among them is a fully illustrated and thoroughly exampled explanation on the subject of Image Mapping with accessibility in mind.
"The following points apply to accessible image maps:
If you want to use an image map, make it a client-side image map.
Include meaningful alt-text for every <area> of the <map>, alt-text that conveys the function of that hotspot.
Use an appropriate text
This page is an attempt to provide an easily digested PNG status board--basically a place to come and see how PNG currently fares for those who haven't been keeping up with the news page or mailing lists. It grew out of an article submitted to Slashdot in February 1999 (with a followup in June 2000), but it is intended to be more dynamic and has been redesigned accordingly.
Stability: excellent * * * * *
The PNG specification has proven to be exceptionally solid. There have been two minor updates since the 1.0 release--to clarify gamma handling and to
In a sense, nobody is in charge of the web. The web is an open standard, with no restrictions on who can post content, or what that content should be about. The web belongs to everybody, and so it belongs to nobody. The openness and decentralization of the web is one of its greatest strengths. But it wouldn't work at all without some sort of standard way of encoding the information. That's where the World Wide Web consortium (W3C) comes in.
The W3C is an international, vendor-neutral group that determines the protocols and standards for the web. They
RSS/XML