Appeal No. 2002-0477
Application No. 09/115,996
The disclosed invention relates to a method and apparatus
for removing co-channel interference in a simulcast receiver for
receiving a high definition television (HDTV) signal having a
digital format and an analog broadcasting TV signal by detecting
either a synchronous signal or a reference signal from the analog
broadcasting TV signal.
Claim 1 is illustrative of the claimed invention, and it
reads as follows:
1. A co-channel interference canceler in a simulcast
receiver for receiving a high definition television (HDTV) signal
having a digital format and an analog broadcasting TV signal,
comprising:
a detector for detecting a synchronous signal from said
analog broadcasting TV signal, determining whether or not the
analog TV signal is received based on whether or not the
synchronous signal is detected, and outputting a detection signal
indicating whether or not the analog TV signal is received;
a co-channel interference rejection filter for removing co-
channel interference from a first input signal including co-
channel interference and outputting a second input signal; and
a selector for selecting either the first or second input
signal according to said detection signal.
The reference relied on by the examiner is:
Citta et al. (Citta) 5,821,988 Oct. 13, 1998
(filed Dec. 19, 1995)
Claims 1, 2, 4 and 5 stand rejected under 35 U.S.C. § 102(e)
as being anticipated by Citta.
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