Signal discrimination circuit

Facsimile and static presentation processing – Facsimile – Auxiliary signal

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

358438, 379100, 379386, H04N 100, H04M 1100, H04M 300

Patent

active

057575134

ABSTRACT:
A signal discrimination circuit judges whether an input signal contains a control signal or not, the control signal having a specific frequency and a specific level for a specific time duration. The signal discrimination circuit includes a component power detection device for detecting the power of a component which is in the input signal and having the specific frequency and a level judging device for determining whether the power of the component is equal to or greater than a power reference value. Finally, a control signal judging device is included for determining that the input signal includes the control signal, when the level judging device judges that the power of the component is equal to or greater than the power reference value, continuously for the duration of a reference time.

REFERENCES:
patent: 3712959 (1973-01-01), Fariello
patent: 4085295 (1978-04-01), Goto et al.
patent: 4239936 (1980-12-01), Sakoe
patent: 4386239 (1983-05-01), Chien
patent: 4395595 (1983-07-01), Nishitani et al.
patent: 4580016 (1986-04-01), Williamson
patent: 4752958 (1988-06-01), Cavazza et al.
patent: 5185783 (1993-02-01), Takahashi et al.
patent: 5287402 (1994-02-01), Nakajima
patent: 5307404 (1994-04-01), Yatsunami
patent: 5323246 (1994-06-01), Kotani et al.
patent: 5325425 (1994-06-01), Novas et al.
patent: 5365592 (1994-11-01), Horner et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Signal discrimination circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Signal discrimination circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal discrimination circuit will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1968954

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.