Appeal No. 2004-1689
Application 09/912,132
from motion vector scaling unit 56; the fact that P frames are
further vertically down sampled in low pass filter and vertical
decimation unit 71 is not precluded by the claim. Also, in
Fig. 5 the B frames are further down converted by element 62 and
motion compensation is performed by element 61 at a lower
resolution, which also meets the claim limitations. However, the
description at column 3 of Choi is the simplest to understand.
Appellants argue that there is no motivation to combine Choi
with Campisano. It is argued that Choi is a down conversion
decoding device that is used to convert a high definition (HD)
signal to a lower resolution signal to be displayed on an NTSC
type analog television and there would be no motivation to
include the up-sampling of Campisano because then the frames
could no longer be displayed on the lower resolution analog
television, making Choi unfit for its intended purpose (Br4-5).
The examiner argues that the motivation to combine comes
from the fact that both Choi and Campisano teach a need to have
scalable decoders and "if a decoder manufacturer wanted to make a
decoder that would display a picture on a low-resolution as well
as a high-resolution monitor, it would build that capability into
it" (EA5). The examiner notes that the decoding process was
computationally intensive which is the reason the prior art
discussed in Choi down sampled the picture data to perform the
decoding process with more manageable amounts of data (EA5). The
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