Appeal No. 1999-1447
Application No. 08/446,316
determining at specific times, whether contents of said
video/audio information signal are representative of audio or
video;
producing a first signal indicative of audio being
present;
producing a second squelch signal active at least
partially, and for a time period at least on the order of one-
tenth second, at distinct times from said first signal;
processing said combined audio/video signal in an audio
processing circuit responsive to said first signal indicative
of audio being present, to produce an output indicative of the
audio signal; and
preventing output of audio information when said squelch
signal is active.
The references relied on by the examiner are:
Newell 3,789,137 Jan. 29,
1974
Dakin 4,583,131 Apr. 29,
1986
(effective filing date of Aug. 15,
1979)
Nakagawa et al. (Nakagawa) 4,809,118 Feb. 28,
1989
(filed Apr. 22,
1986)1
Claims 43 and 45 through 54 stand rejected under 35
U.S.C. § 103(a) as being unpatentable over Newell.
1Appellant has not challenged the interjection of a
Continuation-in-Part (CIP) application in the continuation
chain back to July 16, 1979.
5
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