H - Electricity – 04 – J
Patent
H - Electricity
04
J
354/106
H04J 7/00 (2006.01) H04L 7/04 (2006.01) H04L 25/49 (2006.01)
Patent
CA 1153118
METHOD AND APPARATUS FOR CODE CONVERSION OF BINARY TO MULTILEVEL SIGNALS Abstract of the Disclosure A method and apparatus for converting a binary signal to one having quaternary-level symbols with no d-c component. To achieve this, the running digital sum is limited by selectively inverting words within each frame of (n) symbols. A separate (n + 1)th symbol is added to each frame to indicate the selective inversion of the words, so that the correct polarity of the (n) symbols can be re-established. - i -
377543
Betts Malcolm C.
Dilley James E.
Graves Alan F.
Pascoe Frederick M.
Mowle John E.
Nortel Networks Corporation
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