Graded facsimile image signal coding system
AssigneeKokusai Denshin Denwa Kabushiki Kaisha
InventorsToshiaki Endoh, Yasuhiro Yamazaki
Life of this patent
Estimating the term…
Abstract
A graded facsimile image signal coding system is disclosed which is provided with means for distributing a multi-graded facsimile picture signal, represented by 2.sup.n gradation levels, into n bit planes corresponding to n digits; initial encoding means for detecting, from picture elements forming each bit plane, picture elements at intervals of .DELTA.X picture elements on every .DELTA.Y-th line and encoding the detected picture elements; and additional coding means for further coding each one of said encoded picture elements with reference to encoded four picture elements positioned around said one picture element to be coded.
Claims3
A graded facsimile image signal coding system, comprising means for distributing a multi-graded facsimile picture signal, represented by 2.sup.n gradation levels, into n bit planes corresponding to n digits;
- initial encoding means for detecting, from picture elements forming each bit plane, picture elements at intervals of .DELTA.X picture elements on every .DELTA.Y-th line and encoding the detected picture elements;
- and additional encoding means for further encoding each one of said encoded picture elements with reference to encoded four picture elements positioned around said one picture element to be encoded.
Dependencies are inferred from the claim text.