Appeal No. 97-2709
Application No. 08/380,315
processing the low frequency signal digitally while processing
the high frequency by analog means.”
Citta '431 discloses that it is advantageous to remove
low frequency analog components from a video signal, and
digitize them before transmission (Abstract).
Even if we agree with the examiner (paper number 25, page
5) that it would have been obvious to one of ordinary skill in
the art to process the low frequency components in Kretzmer in
a digital format as taught by Citta '431, we must agree with
appellant’s argument (Brief, page 17) that Gharavi can not be
properly combined with the teachings of Kretzmer and Citta
'431 to arrive at the claimed invention because as indicated
supra Gharavi does not decimate and/or interpolate only the
low band frequencies. The obviousness rejection of claims 11
through 17 based upon the combined teachings of Kretzmer,
Citta '431 and Gharavi is reversed.
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