SOURCE CLOCK REPRODUCING DEVICE, DATA TRANSMISSION EQUIPMENT, DATA RECEPTION EQUIPMENT AND DATA TRANSMISSION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a stable reproduced clock by reproducing a cycle while using a correction time stamp and a count value outputted from a counter, and reproducing a source clock while using the reproduced cycle. SOLUTION: Data transmission equipment 10 transmits a transmission time stamp S15 as the differential information of a count value S13 provided by counting up a mesh clock S11 and a cycle TS 14 provided by dividing the frequency of a source clock S12 through a transmission line 15. A time stamp correcting means 22 at data reception equipment 20 corrects the received transmission time stamp S15 and outputs a corrected time stamp S22. A four-bit counter 11 counts up the mesh clock S11 and outputs the count value S13. A comparator 23 reproduces the cycle while using the corrected time stamp S22 and count value S13 and outputs a reproduced cycle TrS22. A PLL circuit 25 reproduces the source clock S12 while using the reproduced cycle TrS22 and outputs a reproduced clock S25.