Samsung PN51E550 E-Manual page 65

(720p
/ 1080i / 1080p) or Component
(1080i/1080p) signals, displays the full
image without any cut-off.
S_ _,_t V_:v ' i_: Reduces the 16:9 picture
by 50%.
S_ _,_t V_:v ' 2: Reduces the 16:9 picture
by 25%.
} is en a Isled o n ly i n
HDMI odeo
is enabled only in
HDMI DTV mode°