Telegraphy – Systems – Simplex-reversing periodic
Patent
1974-09-03
1976-11-16
Griffin, Robert L.
Telegraphy
Systems
Simplex-reversing periodic
178DIG3, H04N 132
Patent
active
039925722
ABSTRACT:
A system for coding two-dimensional information of M lines and N columns, in which two-dimensional information of M lines and U columns is predetermined as a basic block. If any column information in the basic block has an information change with respect to column information immediately preceding it, information in the basic block is coded. If each column information in the basic block has no information change with respect to the column information immediately preceding it, information corresponding to the number of columns of the basic block and the number of subsequent columns having no information change is coded. Two-dimensional information obtained after the computation operation of a correlation function between an instant bit of information and an immediately preceding bit of information in at least either of the line direction and the column direction may be applied as the input of this system. If the entire information of one line does not include any information change with respect to the information immediately preceding it, the number of lines preceding a line including an information change may be coded before the above mentioned coding.
REFERENCES:
patent: 3521241 (1970-07-01), Rumble
patent: 3730988 (1973-05-01), Shimizu
patent: 3743765 (1973-07-01), Maier
patent: 3769451 (1973-10-01), Connor
patent: 3783187 (1974-01-01), Kusama
patent: 3801737 (1974-04-01), Komura
patent: 3830965 (1974-08-01), Beaudette
Fukata Yasuo
Nakagome Yukio
Teramura Hiroichi
Yamasaki Yasuhiro
Adams Bruce L.
Burns Robert E.
Griffin Robert L.
Kokusai Denshin Denwa Kabushiki Kaisha
Lobato Emmanuel J.
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