Found my answers:
One of the resolution specs used in the
HDTV. 1080i stands for
resolution of 1920x1080 pixels and the magic little 'i' means that the video is being
interlaced. Other common HDTV resolutions are
720i and
720p.
One of the resolution specs used in the
HDTV.
720p stands for resolution of 1280x720 pixels and the magic little 'p' means that the video is in
progressive format. Other common HDTV resolutions are
1080i and
720i.