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
"If you want your website to be accessible there are two things you absolutely have to do:
Specify that accessibility is essential in your requirements definition.
Arrange that the site is tested for accessibility.
The first requires a bit more than just saying "the site must be accessible" but there are lots of examples of such requirements and people who can help you write them.
However, the second is much more difficult because:
Defining what needs to be tested is complex: what disabilities, what functions, what assistive technology,
"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