Patent ID: 6041079
Filing Date: 2000-03-21
Classification: H04N

Abstract:
A method of performing field/frame conversion of DCT domain mixed field/frame mode macroblocks comprising the steps of:a) performing a vertical 1-D IDCT on the DCT domain mixed field/frame mode macroblock according to a first relationship Y=S.sup.-1 X=S.sup.t X to obtain a horizontal 1-D DCT domain macroblock;b) performing field/frame conversion on said horizontal 1-D DCT domain macroblock utilizing a second relationship Y.sub.frame (2 m,n)=Y.sub.field (m,n), with 0.ltoreq.m.ltoreq.7, and a third relationship Y.sub.frame (2 m+1,n)=Y.sub.field (m+8,n), with 0.ltoreq.m.ltoreq.7; andc) performing a vertical 1-D DCT on the field/frame converted horizontal 1-D DCT domain macroblock according to a fourth relationship X=SY to obtain a 2-D DCT domain macroblock.