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Document structure is implicitly conveyed in audio renderings
by using audio layout made up of extra-textual speech and
non-speech audio cues. The following subsections describe this
audio layout and outline the rules for producing such
renderings from the internal representation described in
s:high-level-models.
Audio cues are either fleeting or
persistent. This classification is orthogonal to the
earlier classification into speech and non-speech audio cues.
We define terms fleeting and persistent
below:
[definition1313]
[definition1316]
The following paragraphs clarify the above definitions by
giving some examples of fleeting and persistent cues.
TV Raman
Thu Mar 9 20:10:41 EST 1995