Method of recording facsimile signals

Details Method of recording facsimile signals Method of recording facsimile signals

1988-01-22

1989-04-11

Goldberg, E. A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358283, 346 76PH, H04N 121, H04N 123

Patent

active

048211117

ABSTRACT:
A method of recording the varying gray shades of a facsimile signal line by line with a thermal print head having a linear arrary of heating elements sorts out the individual pixels of a facsimile signal line according to their gray shade in a scale of 1 to 16, and to their line position, into a number of separate series of pixels, each series representing a different gray shade. The 16 different series are stored and read out of a memory in their separate series, and as the separate series are applied to a thermal print head the marking energy is varied 16 times from series to series corresponding to the gray scale of the original signal. Thus 16 successive series of pixels are marked on the same line of a thermosensitive paper to reproduce all the gray shades.

REFERENCES:
patent: 3604846 (1971-09-01), Behane
patent: 4257071 (1981-03-01), Lamb
patent: 4516135 (1985-05-01), Todoh
patent: 4532523 (1985-07-01), Tanaka

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