Graphic information compression method and system

Details Graphic information compression method and system Graphic information compression method and system

1976-02-20

1977-11-15

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 140

Patent

active

040586740

ABSTRACT:
Graphic information is encoded in the form of an electrical pulse train, which is divided into a number of blocks of equal length. Only those blocks containing pulses are retained, and are combined for transmission with a decoding signal for subsequent synthesis of the original pulse train. The compression efficiency may be further increased by converting the pulse train into delta graphic form, or a modified delta graphic form in which extremely short pulses are suppressed prior to compression.

REFERENCES:
patent: 3588329 (1971-06-01), Monk
patent: 3700797 (1972-10-01), Wernikoff
patent: 3784737 (1974-01-01), Waehner
patent: 3950609 (1976-04-01), Tanaka

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