User Guide

General Parameters 219
General Parameters
The DVD Specification states that a DVD player must contain 16 memory locations that can
be addressed DVD-Video content. Each location contains unsigned 16 bits (corresponding to
values 0–65535). These locations are called general parameters, or GPRMs.
Each GPRM contains a value that you can test or change to create complex branching in the
playback of scenarios. GPRMs can store values read from SPRMs or values calculated during
playback, and make navigation decisions based on those values.
The DVD player clears all GPRM information when the viewer stops playback or removes
the disc from the player.
16 Initial language
code
Specifies the initial language code and its
extension for the current audio stream.
R FFFFh
17 Initial language
code extension
R00h
18 INI_LCD for SPST Specifies the initial language code and its
extension for the current subpicture stream.
R FFFFh
19 INI_LCD_EXT for
SPST
R00h
20 Player region code Specifies the regional code the DVD player. R Not
defined
21 Reserved
22 Reserved
23 Reserved for
extended playback
Table 10: System parameters
No. Name Description Read/
Write
Default
Value