Image data encoding apparatus providing increased encoding effic

Details Image data encoding apparatus providing increased encoding effic Image data encoding apparatus providing increased encoding effic

1992-01-09

1994-07-19

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Reduced time or bandwidth for static image communication

358427, H04N 141

Patent

active

053314255

ABSTRACT:
A data encoding apparatus, applicable for example to a facsimile apparatus, increases the degree of image data compression that can be achieved by a variable length encoding scheme, by limiting the maximum amount of data outputted from the encoding apparatus for each scan line to the amount of unencoded image data in a scan line. Generation of increased amounts of data in the case of certain types of image content, as a result of the variable length encoding, is thereby eliminated with a consequent increase in encoding efficiency.

REFERENCES:
patent: 4706127 (1987-11-01), Nobuta
patent: 4805135 (1989-02-01), Ochi et al.
patent: 5168374 (1992-12-01), Morimoto
patent: 5181126 (1993-01-01), Morimoto
"Standardization of Group 3 Facsimile Apparatus for Document Transmission", Geneva, 1980, amended at Malaga-Torremolinos, 1984 and Melbourne, 1988, CCITT Recommendation T.4, pp. 21 to 47.

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