H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 1/00 (2006.01) H03M 5/18 (2006.01) H04B 14/04 (2006.01) H04L 1/24 (2006.01) H04L 25/49 (2006.01)
Patent
CA 2050852
An HDB3 (High Density Bipolar of Order 3) code violation detector includes a converting part for receiving positive polarity data and negative polarity data from a PCM (Pulse Code Modulator) line and for converting an HDB3 code received via the PCM line into an NRZ (Non-Return-To-Zero) signal, and a first judging part receiving the positive polarity data, the negative polarity data and the NRZ signal, for judging whether or not a pattern of the NRZ signal received from the converting part is possible when the NRZ signal is NRZ "1" and for outputting a judgement result. Further, the detector includes a second judging part receiving the positive polarity data, the negative polarity data and the NRZ signal, for judging whether or not a pattern of the NRZ signal received from the converting part is possible when the NRZ signal has a maximum of three consecutive NRZ "0" and for outputting a judgement result. Further the detector includes a third judging part receiving the positive polarity data, the negative polarity data, and the NRZ signal, for judging whether or not a pattern of the NRZ signal received from the converting part is possible when the NRZ signal has at least four consecutive NRZ "0" and for outputting a judgement result, and a detecting part for detecting a code violation of the HDB3 code based on the judgement results of the first, second and third judging parts.
Motono Ryuhei
Okuyama Yuzo
Sato Kazuo
Tachibana Yamato
Takeoka Kazuo
Fetherstonhaugh & Co.
Fujitsu Limited
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