Information signal discriminating apparatus

Details Information signal discriminating apparatus Information signal discriminating apparatus

1991-05-07

1992-12-15

Shepperd, John W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358310, 360 27, 360 331, H04N 578, H04N 592

Patent

active

051722402

ABSTRACT:
Disclosed is an information signal discriminating apparatus adapted to ascertain the type of an information signal which includes a synchronizing signal and which is modulated by one of a plurality of types of modulation carrier signals having respective different frequencies. The information signal type is ascertained quickly by detecting the frequency of a synchronizing signal section included in the information signal concerned. In other words, the frequency thus detected indicates the information signal type.

REFERENCES:
patent: 4673984 (1987-06-01), Kikuchi et al.
patent: 4686585 (1987-08-01), Sato
patent: 4786986 (1988-11-01), Yamanushi et al.
patent: 4811122 (1989-03-01), Kido et al.
patent: 4949195 (1990-08-01), Fujiwra

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