Appeal No. 1997-2681
Application No. 08/211,414
modified the APA by replacing the single information data
filter (14) with the plurality of information data filters
(31-34) of Fischler to optimize data reproduction.
Furthermore, the Examiner explains, Fischler’s filter
selection could be predicated on the actual reproduced
information data signal
(i.e., picked up signal), since Abbott, in a similar system,
teaches filter adaptation based upon the actual information
data signal.
Appellant argues, “Appellant’s admitted prior art does
not recognize different information data frequency bands in
data picked up by a pickup means...[a]ccordingly, Appellant’s
admitted prior art does not teach or suggest selecting from
among a plurality of filters based upon such recognition.”
(reply brief-page 2).
We disagree. At page 2, lines 11-15, of Appellant’s
specification describing the prior art it states:
Currently, a zone bit recording mode is utilized
to maximize the recording density of the
information data, wherein the servo data has the
same frequency throughout every zone on a disk,
but the data on the region where the information
data is recorded, is recorded and reproduced as
frequencies having different bands for the
respective zones.
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