Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1992-04-06
1993-12-28
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
324158R, 371 205, 371 51, H04N 1700
Patent
active
052744469
ABSTRACT:
An image transmission apparatus which is capable of self-diagnosis automatically and successively and which is also capable of automatic system recovery In one embodiment, self-diagnosis may be instructed from a remote station. A reference video signal generated by a pattern generator is supplied to return loops and the return data and the original video signal are compared with each other in a pattern diagnostic circuit. The results of the diagnosis are displayed on a diagnosis result panel. A self-diagnosis start instruction is given from an external circuit and the diagnosis result is transmitted over the line. A change-over switch switches the working and backup circuit systems of the sending and receiving sides responsive to the diagnosis result.
REFERENCES:
patent: 3562710 (1968-04-01), Halleck
patent: 3889109 (1975-06-01), Blessin
patent: 3916381 (1975-10-01), Johnson, III et al.
patent: 4242750 (1980-12-01), Finck et al.
"Television Conference System", Mitsubishi Denki Giho, vol. 60 Nov. 10, 1986.
Burgess Glenton B.
Groody James J.
Mitsubishi Denki & Kabushiki Kaisha
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