Appeal No. 1998-2513
Application No. 08/171,427
BACKGROUND
The invention is directed to a tracking control method and apparatus which uses
tracking error signals for controlling capstan speed in a magnetic-head video system.
Claim 1 is reproduced below.
1. A tracking control method for an image recorder/reproducer which converts
an applied tracking error into a degree of capstan speed control and generates a
driving signal for a capstan motor, wherein said tracking control method comprises
the steps of:
calculating a degree of tracking control responsive to said tracking error by
performing a predetermined gain control operation and by converting said tracking
error into said degree of tracking control;
generating a variable capstan speed instruction in accordance with said
calculated degree of tracking control;
determining a speed error by comparing said capstan speed instruction and
an actual rotation speed of capstan motor; and
calculating a degree of speed control by performing a predetermined gain
control on said speed error and by calculating said degree of speed control used in
controlling said capstan motor wherein said tracking error is reflected.
The examiner relies on the following evidence:
Takeda 2-98856 Apr. 11, 1990
(published Japanese Kokai Patent Application)1
Appellant’s admitted prior art (the APA).
Claims 1-3 and 5-15 stand rejected under 35 U.S.C. § 103 as being unpatentable
over the APA and Takeda. Claims 4 and 16 have been withdrawn from consideration.
1With English translation provided by the USPTO translation branch, dated Feb. 1995.
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