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. 5Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 NextLast modified: November 3, 2007