Do not confuse Digital TV w/ HD TV.

On Feb 19th all over the air broadcasts will be Digital, not necessarily HD. HD is the 16:9 format, A audio CD is digital so are MP3 and whatever Ipods files are, an album, cassette or 8 track (yes i'm that old) is analog.

Just because on Feb 19th all broadcasts will be digital does not mean the will be 16:9 in HD.

If you have cable or satallite you need to do noting you are fine.

Only if you currently use rabbit ears or some other antenna do you need a converter box.