Appeal No. 1997-3182
Application 08/254,643
called for by claims 21 and 22.
Similarly, we also agree with appellant's observations
with respect to Robinson as noted at the bottom of page 5 of
the reply brief:
The reference discloses, "The difference signal
A-B is applied to a modifier network 30 having a
transfer function G to produce an audio signals V2 4
on output line 32." Page 8, lines 5-7. There is no
disclosure whatsoever that the multiplier G is "a
2
first coefficient of proportionality that is a
function of the relative phase of the left [or
first] and right
[or second] input signals."
Although we agree with the examiner's view expressed in
the answer that the difference circuit Figure 2 corresponds to
the differencing circuit generating a difference mode signal
from the left and right audio input signals as set forth in
independent claims 1 and 21 on appeal, we part company with
the examiner's remaining views expressed with respect to the
difference modifier circuit 30 in the answer. The just quoted
portions of the brief and reply brief correctly reflect our
understanding of the teachings of the reference with respect
to the difference modifier circuit 30 and its corresponding
sum modifier circuit 26 and the respective transfer functions
6
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