Method for digital run-length coding with redundance reduction f

Details Method for digital run-length coding with redundance reduction f Method for digital run-length coding with redundance reduction f

1976-11-23

1978-10-17

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

340347DD, H03K 1324, H04L 300, H04N 140, H04N 712

Patent

active

041212592

ABSTRACT:
Method for the digital run-length coding with redundance reduction for the transmission of binary-coded picture information, whereby short code words are assigned to run lengths which occur often, and long code words are assigned to rare run lengths and whereby, from a given run length on, a prefix word for the differentiation of code words of the shorter run-lengths is assigned to the run-lengths, as well as a code word following the prefix word and stating the respective run-lengths as a binary number. Black and white run-lengths which are transmitted by a code word are associated with different code words, depending on how often they occur. The given run-length, from which the coding is to be done with the help of a prefix word, is different for black and white run-lengths. An individual code word is transmitted at the beginning of a line, and it differs from the code words for the individual run-lengths, from the word combination resulting from the prefix word and the subsequent code words, and which does not occur as bit combination of several words or partial words, respectively, in the transmitted data flow.

REFERENCES:
patent: 3560639 (1971-02-01), Centanni
patent: 3739085 (1973-06-01), Rosen
patent: 3748379 (1973-07-01), Epstein
patent: 3830965 (1974-08-01), Beaudette

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