A method for determining motion vectors in an interlaced video coding system
for
coding images comprising interlaced odd and even field. The method (30)
includes selecting (32) a current odd field block and a current even field
block that respectively comprise odd and even fields of a selected current image
block. Differences are identified (33) and thereafter, suitable best matching
odd and even field matching reference blocks are determined (34). From the
suitable best matching odd and even field matching reference blocks a reduced field
search area is provided (35) that is used to complete further searching
(36) and selection of field motion vectors (38). Pseudo-frame motion
vector selection is also conducted (43) and a preferred motion vector is
selected (44) from either a field motion vector pair or pseudo-frame motion vector.
