Digital facsimile communication system capable of representing t

Details Digital facsimile communication system capable of representing t Digital facsimile communication system capable of representing t

1982-01-21

1985-03-12

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358283, 358261, H04N 100

Patent

active

045041156

ABSTRACT:
A digital communication system capable of representing tone differences is provided. In the present system, the threshold level used as a reference in converting an analog image signal into a binary image signal is varied, preferably, from scanning line to scanning line at the transmitter side. Then, at the receiver side, exchanging or rearranging of the binary image data between different scanning lines in the same address is carried out. By so doing, data compression technique may be advantageously applied at all times to maintain a high transmission rate.

REFERENCES:
patent: 4212035 (1980-07-01), Nakagome et al.
patent: 4215375 (1980-07-01), Usubuchz et al.
patent: 4237495 (1980-12-01), Yamamoto
patent: 4258393 (1981-03-01), Ejiri et al.
patent: 4340912 (1982-07-01), Troxel
patent: 4414581 (1983-11-01), Kato et al.
patent: 4420771 (1983-12-01), Pirsch
patent: 4447829 (1984-05-01), Schayes et al.
patent: 4447831 (1984-05-01), Adsett

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