Is 1080i= 1440×1080

[John Rofrano]

1080i usually means 1920×1080 interlaced. This uses a pixel aspect ration of 1.0 (also known as “square pixels”).

HDV uses 1440x1080i with a non-square pixel aspect ratio of 1.3333. If you multiply 1.3333 x 1440 you get 1920! (ok, so you get 1919.952 but who is going to argue about 0.048 of pixel among friends?)

So all 1080i is really 1920×1080.

~jr

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