Appeal No. 97-2709
Application No. 08/380,315
brief for the respective positions of the examiner and the
appellant.
OPINION
The obviousness rejections of claims 11 through 17 are
reversed.
Citta '100 discloses the separation of a video signal 10
into a high frequency component 12 and a low frequency
component 18 (Figure 1). An interpolator 46 is used to
reconstruct a low frequency component signal on line 48, and
this digital signal is summed with the delayed high frequency
component in summation unit 52 to produce a high frequency
difference signal 53. The vertical blank insertion unit 40
then inserts the low frequency digital component signal into
the vertical blanking interval of the analog high frequency
signal.
The examiner acknowledges (paper number 25, page 3) that
Citta '100 “does not disclose separate horizontal and vertical
components with associated decimators and interpolators".
Gharavi discloses a decimator 105 which decimates the low
frequency and the high frequency components of a video signal,
and an interpolator 131 in a feedback loop that interpolates
4
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Last modified: November 3, 2007