Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1980-01-21
1982-06-29
Miller, Charles D.
Communications: electrical
Audible indication
Percussion-type sound producer
375 4, 455608, 371 56, H03K 1324
Patent
active
043374573
ABSTRACT:
The present invention concerns a method for the serial transmission of binary data in which each binary digit is transmitted in the form of an elementary signal occupying a time interval known as the binary interval.
In this process a binary 1 is represented alternatively by a pulse or a space occupying the whole of the corresponding binary interval; a binary 0 is normally represented by a pulse occupying a half binary interval, except in the case where it is the first or the last one of a sequence of n+1 successive binary zeroes, the first being represented according to the above rule as a binary 0, except if the binary ones appeared after the preceeding sequence of n+1 successive binary zeros and are an even number, in which case it is represented as a binary 1 following the rule of alternation, the last being represented in accordance with the above rule as a binary 1 contradicting the alternation rule.
The invention can be used to advantage in fibre optic links joining junctions encoded in HDB.sub.3.
REFERENCES:
Auffret, "Deuxieme Colloque Europeen sur les Transmissions par Optique", Sep. 1976, pp. 343-349.
Camborde, "Cables et Transmissions", vol. 32, No. 2, Apr. 1978, pp. 278-337.
Prigent, "Cables et Transmissions", vol. 29, Dec. 1975, pp. 434-456.
Compagnie Lyonnaise de Transmissions Optiques
Miller Charles D.
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