H - Electricity – 04 – J
Patent
H - Electricity
04
J
363/10
H04J 3/02 (2006.01) H04L 5/24 (2006.01) H04L 25/49 (2006.01)
Patent
CA 1070867
ABSTRACT OF THE DISCLOSURE: In a time-division digital transmission system comprising transmitting and receiving stations interconnected by transmission lines, a number of component digital channels having a low flow rate are multiplexed into a single resultant channel having a high flow rate. The code used in the stations is a binary code and the code used in the lines is a multi- level code such that a number N of bits in the binary code corresponds to a smaller number N' of elements of the multi- level code. Consequently, a given flow rate in the station corresponds to a smaller flow rate in the line, equal to N'/N times the flow rate in the stations. The system comprises, on its transmitting side, means for placing in parallel the bits of a number of component channels equal to a multiple k of N, at the rate of one bit per component channel, so as to form parallel words of kN bits and, on its receiving side, means for distributing the bits of the parallel words of kN bits at the rate of one bit on each of the kN component chan- nels. The system further comprises, on its transmitting side, means for multiplexing the bits of the parallel words of kN bits into k parallel words of N bits, means for converting the parallel N-bit words from the binary code used in the stations into parallel words of N'elements in the multi-level code used in the line, and, on its receiving side, means for con- verting the parallel words of N' elements of the multi-level code used in the line into parallel N-bit words of the binary code used in the stations, means for forming parallel words of kN bits out of a number k of N-bit words supplied by the latter said converting means and means for demultiplexing the parallel kN bit words into kN bits at the rate of one bit per component channel.
267538
Boutmy Patrick E.
Walraet Jean G.
LandOfFree
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