Appeal No. 2002-1197
Application 09/131,167
predetermined range the examiner points to Koski, column 1,
lines 43-47; column 3, lines 20-36; column 5, lines 45-50; and
column 6, lines 1-10 (FR4). The examiner states that Koski
discloses a double talk detector "to freeze the adaptation of the
filter coefficients when the output signal of the microphone,
which is the superposition of the near-end speech signal and the
far end speech signals[,] said far end speech signal [being] the
cause of the echo, reaches a threshold that causes the detector
to freeze said coefficients" (FR2). The examiner states (FR3):
"Koski states that the filter coefficients of the adaptive filter
will only be aloud [sic, allowed] to update, i.e., they are
frozen, unless the signal from the microphone (the source) is
below a value. The signal from the microphone being the near end
users signal plus the echo signal coming from the speaker of the
communication device" (FR3).
Appellant argues: (a) Koski only freezes updating of the
coefficients upon detection of "double talk" and double talk is
not equivalent to an output signal of the microphone (Br9-10);
and (b) the filter coefficients in Koski are not updated only
when the value of the microphone output is within a predetermined
range (Br10-12). Appellant does not argue the other limitations
of the claims or the propriety of the combination with Haneda.
Arguments not raised are waived. See 37 CFR § 1.192(c)(8)(iv)
(1998) (brief must point out errors in the rejection); cf.
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