Guidelines
for Usage |
Actual types of Program Related Text are identified
by this element, LANGUAGE.USAGE, and should be selected from a picklist
of options.
A different element, DESCRIPTION.PROGRAMRELATEDTEXT,
contains either the actual text (if of limited length) or indicates
a separate, distinct, related
file containing that text or a separate audio track. Many Digital
Asset Management Systems will associate files that are cataloged
separately,
but related to an item.
Use the element RELATION.TYPE and RELATION.IDENTIFIER
to refer to the presence and identification of these other related
formats and forms of
the primary audio presentation for a resource.
Use the element LANGUAGE to identify the actual
language captured in alternative audio.
The various permutations of Program Related Text
may include the following:
- A transcript may exist as a text document.
- Speech-to-Text conversions may exist as (a)
a text document, or (b) an electronic file with timecodce synchronization
data.
- Closed Captions may exist
as (a) a text document, (b) an electronic file
with timecode synchronization
data, (c) as a video program or broadcast with
captioning encoded on SMPTE line 21 of the video signal (NTSC
standard),
or
(d) as data encoded
within the "picture user_data" portion of the video
stream in DTV (ATSC standard).
- Open Captions may exist as (a) a text document,
(b) an electronic file with timecode synchronization data,
(c) as a video
program or broadcast with captioning encoded
on SMPTE line 21 of the video signal (NTSC standard), (d) as
data encoded within the "picture
user_data" portion of the video stream in DTV
(ATSC standard), or (e) as a completely separate track of text
or its graphical representation
(DVD-Videodisc standard specification or QuickTime
tracks specification).
- Subtitles may exist as (a) a text document,
(b) an electronic file with timecode synchronization data,
(c) as a video program or broadcast with captioning
encoded on SMPTE line 21 of the video signal
(NTSC standard), (d) as data encoded within the "picture user_data"
portion of the video stream in DTV (ATSC standard), or (e)
as a completely separate track
of text
or its graphical representation (DVD-Videodisc
standard specification or QuickTime tracks specification).
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