https://docs.amd.com/r/en-US/pg103-v-tpg/Box-Size-0x0078-Register?contentId=EOrnldp3pq4Y4eMyn7vn6g
Box Size (0x0078) Register - Box Size (0x0078) Register - 8.2 English - PG103
The Box Size register defines the size of overlying box, where N represents NxN size of box. It is NxN for progressive video and Nx2N for interlaced video. The...
box sizeregisterenglish