Data transmission systems

Details Data transmission systems Data transmission systems

H - Electricity

04

L

354/103

H04L 15/00 (2006.01) H04B 1/04 (2006.01) H04L 25/45 (2006.01) H04L 25/49 (2006.01)

Patent

CA 1106065

ABSTRACT OF THE DISCLOSURE Intelligence is conveyed in a PCM bit stream form with alternate bits being inverted. Additional information is conveyed by violations of the alternate bit rule so that two successive bits have the same polarity. Prior to being coupled to the alternate mark inversion coder a pseudo-random bit stream is mixed by binary addition without carry to the intelligence bit stream to maintain low DC level in the trans- mitted mixed bit stream and to maintain bit transitions relatively high.

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