Appeal No. 2002-0477
Application No. 09/115,996
Reference is made to the briefs (paper numbers 12 and 14)
and the answer (paper number 13) for the respective positions of
the appellant and the examiner.
OPINION
We have considered the entire record before us, and we will
reverse the anticipation rejection of claims 1, 2, 4 and 5.
All of the claims on appeal require the detecting of a
synchronous signal or a reference signal from the analog
broadcasting TV signal. According to the examiner (answer,
pages 3 through 7), the items 38 and 40 in Figure 1 of Citta
detect a synchronous signal or a reference signal from the NTSC
picture carrier signal. Appellant argues (brief, pages 7 through
9; reply brief, pages 4 through 7) that the NTSC picture carrier
signal is neither a synchronous signal nor a reference signal of
the analog broadcasting signal. We agree. Although Citta
provides a “circuit for determining when an NTSC co-channel
interference reduction filter [20] may be advantageously
incorporated in the signal path of an HDTV receiver” (column 1,
lines 49 through 52), Citta uses a comparison between NTSC power
(i.e., the output from power averaging circuit 38) and white
noise (i.e., the output from white noise power averaging circuit
52) to determine when the co-channel interference filter 20
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