Facsimile and static presentation processing – Facsimile – Auxiliary signal
Patent
1995-09-08
1998-05-26
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Auxiliary signal
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.
Ikeuchi Michio
Murata Yasumoto
Yoshikawa Shuuichi
Coles Sr. Edward L.
Sharp Kabushiki Kaisha
Williams Kimberly A.
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