Method for interline-coding facsimile signal

Details Method for interline-coding facsimile signal Method for interline-coding facsimile signal

1977-07-20

1979-01-09

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358260, 340347DD, H04N 140, H04N 712

Patent

active

041341333

ABSTRACT:
A method for interline-coding a facsimile signal, in which information of scanning lines of the input facsimile signal is alternately divided into information of at least one first unit line and information of at least one second unit line. A first one of the first unit lines is first coded in accordance with a predetermined coding principle. The information of the next one of the first unit lines is secondly coded in accordance with a predetermined coding principle prior to coding of information of the first one of said second unit lines. The information of the first one of the second unit lines is thirdly coded by two-dimensional predictive coding using, as reference information, the information of the first one and the next one of the first unit lines. The operations of the second coding and the operation of the third coding are repeatedly achieved thereafter.

REFERENCES:
patent: 3813485 (1974-05-01), Arps
patent: 3830966 (1974-08-01), Aldrich
patent: 3916095 (1975-10-01), Weber
patent: 3927251 (1975-12-01), White
patent: 4070694 (1978-01-01), Sakamoto

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