Process for T.D.M. frame synchronization employing variable synchronizing words

摘要

A process for T.D.M. frame synchronization which employs variable length synchronizing word at the receiving end and wherein the transmitter produces signals which consist of groups each comprising p bits and one marker bit and in respect to each multiplex frame contains a total of m marker bits of which s marker bits form the synchronizing words and where at the transmitter s-1 marker bits determine the following s-th marker bit and wherein the transmitted signal is stored and p+1 addresses are produced which are periodically assigned to the p bits and marker bits of each group and at the receiver the s-th bit is obtained from s-1 bits stored and compared with the corresponding received bit of the T.D.M. signal and when identity occurs pulses having a similar address are counted and a frame synchronizing signal is emitted.