Signal compression system for binary digital signals

Details Signal compression system for binary digital signals Signal compression system for binary digital signals

1975-07-18

1977-11-08

Sloyan, Thomas J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358260, 358261, H04N 712

Patent

active

040578348

ABSTRACT:
A signal compression system for efficient transmission of an input binary digital signal, in the form of a binary pulse signal, in which bit polarity reversal is checked after sampling for a predetermined number of bits of the sampled binary pulse signal. In a case of detection of any bit polarity reversal, the sampled binary pulse signal is sent out into a converted output pulse signal for the predetermined number of bits. In a case of non-detection of any polarity reversal, the number of bits or the number of bit blocks having no polarity reversal is coded as a coded pulse signal and sent out into the converted output pulse signal. A coded pulse signal is distinguished, the the converted output pulse signal, from the binary pulse signal by at least one flag bit.

REFERENCES:
patent: 2978535 (1961-04-01), Brown
patent: 3061672 (1962-10-01), Wyle
patent: 3071727 (1963-01-01), Kitsopoulos
patent: 3483317 (1969-12-01), De Groat
patent: 3754238 (1973-08-01), Oswald
patent: 3783187 (1974-01-01), Kusama et al.
patent: 3935379 (1976-01-01), Thornburg et al.
patent: 3941922 (1976-03-01), Tsuchiya et al.

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