Telegraphy – Systems – Printing
Patent
1977-10-31
1979-03-20
Robinson, Thomas A.
Telegraphy
Systems
Printing
400111, B41J 500, H04L 300
Patent
active
041455703
ABSTRACT:
A method and apparatus for coding, transmitting, receiving and displaying remotely or locally, all Arabic-Farsi characters or letters, basic arithmetic signs, numerals, punctuation marks and diacritical marks, as well as teleprinter operation commands in 5-bit standard Baudot codes. An Arabic-Farsi teleprinter similar in operation to the English teleprinter and compatible with the International exchange systems is provided without eliminating any letter forms. The teleprinter operation (the ability to compress the data into 5-bit characters) is based upon two basic criteria of the Arabic-Farsi languages, namely: (1) the form (start, middle, and or independent) of a character can be known if the preceding character and the following characters are known; and (2) there are six characters that are identical except for the presence or absence of a dot. The digital logic circuits make use of the above criteria to permit the encoding and decoding and thus the transmitting and receiving of complete Arabic-Farsi languages.
REFERENCES:
patent: 3852720 (1974-12-01), Park
patent: 3938099 (1976-02-01), Hyder
patent: 3998310 (1976-12-01), Chaudhry
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