Multilevel signal compression method

Details Multilevel signal compression method Multilevel signal compression method

1982-04-01

1984-10-09

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358261, H04M 100

Patent

active

044764952

ABSTRACT:
A digitized multilevel signal is encoded on the basis of unit combinations each including a run-length bit field indicative of run-length at each of the signal levels and a single continuation bit indicative of transition of the signal levels. The encoding is so modified that a virtual run of zero length is inserted when the transition of the signal levels at adjacent sampling points departs from a predetermined order. Polarity of the continuation bit is inverted upon every transition of the signal level.

REFERENCES:
patent: 4096527 (1978-06-01), Furuta
patent: 4201909 (1980-05-01), Dogliotti et al.
patent: 4399467 (1983-08-01), Subramamiam
patent: 4420771 (1983-12-01), Pirsch

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