Appeal No. 2002-1453
Application No. 09/160,790
block of original pixel samples, where the original block sample
is denoted by an "x". Superimposed over the 8x8 pixel block is a
4x4 pixel block comprising a 4:1 resized version of the original
8x8 pixel block, where the resized block sample is denoted by an
"*". A resized pixel block is formed by processing the original
8x8 pixel block according to an 8x8 discrete cosine transform
(DCT) to produce an 8x8 DCT coefficient block. See page 4 of
Appellant's specification. Figure 2B is a graphical
representation of the relative spacing of samples of a mixed
frame-mode encoded and field-mode encoded original pixel block
and superimposed samples of a pixel block resulting from a 4:1
resizing of the original pixel block. The resized sample
associated with the field-mode encoded pixel blocks are not
appropriately spaced with respect to the original sample.
Moreover, the left and right resized blocks are not properly
aligned. These errors are present because the original field-
mode encoded pixels within a particular field are vertically
separated by two lines, unlike the original frame-mode encoded
pixels which are vertically separated by one line. Thus, there
is a half picture element (pel) error introduced during the DCT
domain resizing process. See pages 4 and 5 of Appellant's
specification. Appellant corrects this error by using the flow
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