Edge delta runlength expander unit for bi-level graphics

Details Edge delta runlength expander unit for bi-level graphics Edge delta runlength expander unit for bi-level graphics

2007-01-16

2007-01-16

Vo, Anh T. N. (Department: 2861)

Facsimile and static presentation processing

Facsimile

Reduced time or bandwidth for static image communication

Reexamination Certificate

active

11003362

ABSTRACT:
Edge delta runlength (EDRL) compression algorithms may be employed to compress bi-level black print data, such as data representing text. A printer capable of rapidly decoding the compressed EDRL data includes a decoding circuit to produce delta signals. An edge calculation circuit in turn operates on the delta signals to produce runlength data which is subsequently transformed into image line data by a runlength decoder circuit.

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