Image data transmission apparatus with detachable reader

Details Image data transmission apparatus with detachable reader Image data transmission apparatus with detachable reader

1989-03-15

1991-09-03

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358431, H04N 1024

Patent

active

050459538

ABSTRACT:
A group III facsimile apparatus is provided with a detachable image reading unit for hand held scanning of large or bulky originals. Lines of image data from the image reading unit are stored in a memory, and then read out and converted to modified Huffman (MH) running length code for transmission. Fill bits are added where necessary so that each line has a minimum transmission time of 10 milliseconds. A group III facsimile apparatus normally automatically disconnects from a transmission when no data has been transmitted for five seconds. To keep this from happening while an original is being scanned slowly by hand, enough fill bits are added to make each line a minimum transmission time of one second when the number of lines of image data in the memory is less than 10.

REFERENCES:
patent: 4386373 (1983-05-01), Kondo et al.
patent: 4586088 (1986-04-01), Kondo
patent: 4626925 (1986-12-01), Toyoda
patent: 4652937 (1987-03-01), Shimura et al.
patent: 4962526 (1990-10-01), Kotami et al.

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