Facsimile system for the transmission of picture

Details Facsimile system for the transmission of picture Facsimile system for the transmission of picture

1974-12-27

1976-05-11

Britton, Howard W.

Telegraphy

Systems

Simplex-reversing periodic

178DIG3, H04N 138

Patent

active

039565785

ABSTRACT:
This system is provided for the field of electronic facsimile transmitting of a picture and relates more particularly to the compression of data to reduce the number of bits to be transmitted at a given resolution of the picture. Compression is effected by a correlation of neighbouring points of the picture by omitting, at the transmitting end, one point in four on two adjacent lines and by restituting it at the receiving end by means of a relatively simple Boolean function which takes into account the structure of the characters used in that picture. That first compression may be combined with a second compression due to the coding of the length of a white range.

REFERENCES:
patent: 2905756 (1959-09-01), Graham
patent: 2921124 (1960-01-01), Graham
patent: 3051778 (1962-08-01), Graham
patent: 3801737 (1974-04-01), Komura
patent: 3849592 (1974-11-01), Rosenheck

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