METHOD AND SYSTEM FOR 5-BIT ENCODING OF COMPLETE ARABIC - FARSI LANGUAGES

摘要

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 bandit 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, end 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 alphabets, a particular grouping of characters with level coder for each grouping, as well as a key – board arrangement and control circuits for more versatile use of input / output device are also disclosed