format for broadcast video pleaseeeeeeeeeee. help...

i work for a music channel sometimes it is really urgent to send the latest files on air, which format is best in its quality as well as in its size
for broadcasting.

sizes increase in QUICKTIME n AVI
currently we use .m2p an mpeg 2 format developed by CANOPUS EDIUS.
it is really weird to send this format as the size is too much in this case.

i personally prefer QUICKTIME. is it right.
is MPEG2 file is justified for showing on air.

please help me out i will b xtremly thankful.

CANWAL BRAR