Appeal No. 2004-0858
Application No. 09/747,709
regard to claims 13, 14, 20, 21, 23 and 24, the examiner offers
Vahatalo and Hollier.
Reference is made to the briefs and answer for the
respective positions of appellants and the examiner.
OPINION
With regard to independent claims 1, 12, 19 and 22, the
examiner points to Figure 5B, the abstract and column 4, line 63-
column 8, line 50, of Vahatalo, and contends that RIN and SIN are
two waveforms in an audio channel which are used to calculate the
delay from the outgoing echo location to the returned echo,
wherein the delay is set in an adjustable delay element 43. The
examiner specifically identifies sampling means 45 and 46,
calculation means 44, adjustable delay means 43 and adaptive
filter 40.
It is the examiner’s contention that while Vahatalo does not
disclose that the location of the echo is calculated for an audio
channel in a computer, the skilled artisan would have known that
the method of determining the echo location would have been the
same in either acoustic environments or hybrid line environments
and that that “method would require identifying the outgoing
signal in part of the incoming signal, regardless if the signals
were propagated through the air or transmission line” (Paper No.
-3–
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