Hi all, Could someone point me to a good online reference on NTSC video? Also, could someone please tell me if there is a way to determine which field is odd and which is even? From the (poorly written) reference I am currently looking at, it looks as if the vertical sync is the same for both the odd and even fields so that when you assemble the frame, you don't know which field belongs to which frame (and, therefore, you odn't know which is odd and which is even). Thanks, Sean