Canon FS200 widescreen resolution

The FS200 specifications below advertise at least 450K pixels in 16:9 mode. But the imported MPEG files show a resolution of 720x480 (345,600 pixels) in the file properties, and when I play them in Windows Media Player, they have black bars on top and bottom, and the image actually displayed is 640x360 (only 230,400 pixels). What's the deal?

4:3 - approx. 340,000 pixels (ADV.Z* off)
16:9 - approx. 360,000 pixels (ADV.Z off)
16:9 - approx. 450,000 pixels (ADV.Z on, wide)
16:9 - approx. 360,000 pixels (ADV.Z on tele)

Media Player is set to 100%, so it normally plays videos at 1:1. They're all 720x480 in the properties and 640x360 actual, regardless of the zoom. Maybe it's pretty standard for camcorders (never had one before), but Canon seems to code their videos in a strange way. I read somewhere else that the videos themselves are actually a higher resolution but jammed into a smaller 720x480 codec, and that somehow playing them in different places fills them out to the original resolution, whatever that means.