Historically unique to NTSC DVDs, these are encoded on "Line 21" of the video signal and are usually decoded by the TV itself rather than the player. Managing Subtitles
This code restricts playback to Canada, the United States, and U.S. territories. Standard players from other regions (like Europe’s Region 2) cannot play these discs unless they are "region-free". subtitle NTSC DVD R1
The North American television standard. It uses a resolution of 720x480 pixels and a frame rate of 29.97 frames per second (fps). Subtitles vs. Closed Captions (CC): Historically unique to NTSC DVDs, these are encoded