PCM receiver binary synchronising logging system - form groups of binary elements one having complementary binary values

摘要

The system receives input pulse code modulated signals multiplexed in line to form sequential groups. The groups gi (i being a positive whole number) have n binary elements e.i.j. (j is a variable whole number from O n-1 for i fixed). The groups have a binary synchronising element which is such the eij and ei+1, have complementary binary values. The system has a circuit for memorising each binary element ei, j. It has a circuit for comparing each binary input element ei+1, j with each memorised binary element ei, j. A circuit marks each group gk+1 (k is a positive whole) having a single binary element ek+1, (1 is a whole between O and n-1) such that ei, 1 and ei+1 have complementary binary values whenever i is less than or equal to k. A circuit marks each binary element ek+2, 1.