| 摘要 |
PROBLEM TO BE SOLVED: To make a synchronized pull-in device of a multi-frame system having a frame bit in an optional frame small in scale. SOLUTION: This multi-frame synchronizing device 10 for the synchronized pull-in processing of a multi-frame consisting of four frames 1 to 4 and provided with frame synchronizing bits in the frames 1 and 2 is provided with RAMs 30 and 31 detecting a bit string equal to a frame synchronization bit by a synchronization pattern detecting circuit 21 and storing positional information of the bit string equal to the frame synchronization bit of the frame 1, and a multi-frame detection circuit 32 comparing the positional information and positional information of a bit string equal to the frame synchronization bit of the frame 2 to judge whether a synchronization pattern is normal and storing only the positional information of a normal synchronization pattern. Thereby, it is possible to provide the multi-frame synchronizing device capable of using the random access memory of a comparatively small capacity of make device scale small. |
