Its HD output can be switched between 720p (from 720p outputs), 1080i, or 1080p. In either 1080i or 1080p output mode, the V-1HD can accept both 1080p and 1080i input signals simultaneously. The switcher has a 12-channel audio mixer for mixing stereo audio from HDMI and external stereo audio sources and its dedicated microphone input.
http://proav.roland.com/v1hd