Apple DVD Studio Pro 4 - Manual (Page 509)

Bit 4 (MPEG karaoke capability first bit) is off when the player is not MPEG karaoke-capable,
and on when it is. Bit 5 (MPEG karaoke capability second bit) is always off.
Bit 12 (MPEG capability first bit) is off when the player is not MPEG capable, and on when
it is. Bit 13 (MPEG capability second bit) is always off.
There is no bit for regular PCM capability because all players must support it.
SPRM 16: Initial Language Code for Audio
This SPRM is the initial audio language that the viewer has set the DVD player to. It can
be assumed to be the primary spoken language that the viewer wants to hear.
As with SPRM 0, these values are derived from a two-letter code for each language spoken.
The code is derived from the lowercase ASCII value of each letter. See
Language Code
Table for a complete table of all of these language values.
It is useful to know the setting of this SPRM when dealing with multiple-language projects.
By reading the value of SPRM 16, you can determine the spoken language that the viewer
wants to hear. If you have a project that has audio streams in more than one language,
you can play the appropriate spoken language that the viewer has selected. If the viewer
must choose a language from an audio menu, this SPRM value can be used to select the
appropriate button highlight.
SPRM 17: Initial Language Code Extension for Audio
SPRM 17 is rarely used but has several values. It can be used to flag an audio stream as
audio for the visually impaired or for director’s commentary.
SPRM 17 value Contents
0 Not specified
1 Normal captions
2 Audio for visually impaired
3 Director’s comments 1
4 Director’s comments 2
SPRM 18: Initial Language Code for Subtitle
SPRM 18 is the value of the initial subtitle language setting of the DVD player. It is a
preference set by the viewer.
Many feature films that are put onto DVD are subtitled in several languages. By reading
this SPRM, you can preselect the appropriate subtitle stream to the viewer’s preferred
language. In the case of a subtitle menu, you can preselect the appropriate button
highlight.
509 Chapter 20 Creating Scripts