Most HD equipment can record both progressive and interlaced video. Typically,
1080-line video is interlaced (1080i) and 720-line video is progressive (720p). Several
1080p formats exist, such as 1080p24, but there are no 720-line interlaced formats. For
more information, see “
About Interlaced Scanning
” and “
About Progressive Scanning
on page 387.