| 摘要 |
<p>PURPOSE:To reduce same code continuation length and also to suppress the occurrence of the same code continuation itself by modulating branched signals of two series having the same contents via two M-series generators having different numbers of stages and selecting and transmitting a signal series having small code continuation length. CONSTITUTION:A speed converting circuit 7 inputs an input signal series subjected to speed conversion to a branch circuit 8. 1st and 2nd M-series signal generators 10 and 13 having different numbers of stage produce 1st and 2nd M-series signals which are supplied to 1st and 2nd exclusive OR circuit 11 and 14 respectively. Then the 1st modulation input signal series are different from the 2nd modulation input signal series. A selection circuit 15 adds information showing the specific series where the modulation is applied to the remaining bit of the signal having the smaller continuous same polarity signal length by means of the output of a specific M-series signal generator. Then said added information is outputted to a transmission line 6 as a transmission line signal. Thus it is possible to reduce the same code continuation length and at the same time to suppress the occurrence of the same code continuation itself.</p> |
