Method and apparatus for differential run-length coding

Details Method and apparatus for differential run-length coding Method and apparatus for differential run-length coding

1984-12-31

1986-12-23

Shoop, Jr., William M.

Communications: electrical

Audible indication

Percussion-type sound producer

358260, H03K 1322, H04N 100

Patent

active

046315217

ABSTRACT:
A method and apparatus for data compression in a digital imaging process is disclosed. More specifically a method is disclosed whereby a more efficient reduction of memory space is obtained when a dithered image is of the so called "grey scale" type. The binary bits representing the pixels of the dithered image are differentiated to obtain groups of ones or zeros, so that these groups may be represented by a code, thereby saving memory space. One embodiment uses the Exclusive OR function in the differentiation process.

REFERENCES:
patent: 3967052 (1976-06-01), Judice
patent: 4005411 (1977-01-01), Morrin, II
patent: 4086620 (1978-04-01), Bowen et al.
patent: 4215375 (1980-07-01), Usubuchi et al.
patent: 4542411 (1985-09-01), Imanaka et al.

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