Telegraphy – Systems – Printing
Patent
1976-02-02
1979-07-03
Birmiel, Howard A.
Telegraphy
Systems
Printing
178 22, H04K 106
Patent
active
041601238
ABSTRACT:
Method and apparatus for encoding transmitted data and decoding the data at a receiving facility. The data is divided into elements of equal length. Each element is assigned an age number having a value within a prescribed range. The age value determines the number of delay intervals experienced by each element before being transmitted. Delays of the proper length are obtained by the use of storage elements. Age numbers are assigned arbitrarily. The age numbers are incremented upon the passage of each delay interval. Values within the aforementioned range are randomly generated. A data element is removed from storage and transmitted when: (1) its age number compares with the randomly generated value; or (2) when its age number reaches the extreme value; or (3) when its age number is zero. A new element is placed in storage simultaneously with the removal of an element therefrom.
At the receiver end elements are stored and their age numbers are incremented upon the occurrence of each delay interval. Elements are removed from storage (and replaced by a newly received element) when they reach the extreme value. Elements having age numbers of zero (i.e. "no delay") are transferred to the receiver output line without delay. The re-transposed elements at the receiver output line reconstruct the message elements into the arrangement of the original data as it was before its encoding (i.e. transposition) at the transmitting end. Various modifications of the basic technique are provided to encode various types of data and to solve other technical problems.
REFERENCES:
patent: 3657699 (1972-04-01), Rocher
patent: 3731197 (1973-05-01), Clark
patent: 3773977 (1973-11-01), Guanella
patent: 3824467 (1974-07-01), French
patent: 3921151 (1975-11-01), Guanella
patent: 3970790 (1976-07-01), Guanella
Graf Alban
Guanella Gustav
Birmiel Howard A.
Durr Frank L.
Greene Orville N.
Patelhold Patentverwertungs & Elektro-Holding AG
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