| 摘要 |
The method is for frame synchronization extraction of a signal made up of successive packets each having a heading comprising one out of two binary words W1 and W2 used alternately in the sequence of packets, which are grouped in frames of constant duration or comprising a constant number of packets, a change of frame, being indicated by a particular configuration of the series of binary words, different from alteration and over a given number u of successive packets eg W2, W2, W1, W1. Changes of frame are identified, using shift registers 22, 24 and gates 261, 262, 28 by detecting a given characteristic configuration of absences of recognition of the binary words complementary to the words indicating the change of frame. <IMAGE>
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