Run length encoder

Details Run length encoder Run length encoder

1988-06-08

1992-05-12

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Reduced time or bandwidth for static image communication

3582611, 3582612, 3582613, H04N 140

Patent

active

051132664

ABSTRACT:
A run length encoder for compressing binary image data including black and white picture elements of opposite logic levels is disclosed. The encoder provides means for calculating black to white data ratio regarding image data to be compressed and means for reversing each of the logic levels of the binary image data from one to another before encoding them if black data is predominant.

REFERENCES:
patent: 3795765 (1974-03-01), De Groat
patent: 3919476 (1975-11-01), Torpie
patent: 4057834 (1977-11-01), Nakagome
patent: 4092676 (1978-05-01), Saran
patent: 4229768 (1980-10-01), Kurahayashi et al.

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