LG LA643x Owner's Manual page 111

My Media supporting file
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Maximum data transfer rate:
20 Mbps (megabits per second)
External subtitle formats supported:
*.smi, *.srt, *.sub (MicroDVD, SubViewer 1.0/2.0), *.ass, *.ssa, *.txt (TMPlayer), *.psb
(PowerDivX)
Internal subtitle formats supported:
XSUB (supports internal subtitles generated from DivX6)