Run length encoding and decoding process and apparatus

Details Run length encoding and decoding process and apparatus Run length encoding and decoding process and apparatus

1978-04-25

1980-06-10

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

340347DD, H04N 100, H04N 140

Patent

active

042075998

ABSTRACT:
Binary data is generated by a facsimile scanner or the like. A binary run length code indicating a number of successive "1" or "0" bits in the data is formed. A shift code comprising all "0" or "1" bits in a number equal to the number of the run length code is appended to the run length code only when the run length code is longer than a preceding run length code. A shorter run length code is indicated by inserting logical "0" bits in vacant high order places of the run length code so as to make the run length code equal in length to the previous run length code.

REFERENCES:
patent: 3588329 (1971-06-01), Monk
patent: 3925780 (1975-12-01), Van Voorhis
patent: 3980809 (1976-09-01), Cook
patent: 4028731 (1977-06-01), Arps

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