Anamorphic SD 16:9?

Hi,

This is probably a really dumb question, but...

I work for a church where we capture live footage from a video switcher with software. The video is shot in HD 1440X1080. We captured it to 720X486 which looks good but it has the horizontal black bars on top and bottom.

I need to end up with anamorphic 480p if possible, so that the video dimensions are widescreen with no black bars and would fill a widescreen window. Is it 720X405? How do I cut out the black bars and retain the quality?

Thanks
Hunter