| 摘要 |
<p>PURPOSE:To prevent the character data of a signal from being recognized erroneously even when bit length is long by inserting a control code into the character data at a transmission side, and erasing the control code by detecting the changing point of the control code at a reception side. CONSTITUTION:When the bit of the character data transmitted from a transmission side terminal station 10 is continued with the same code and by constant number (n) that is limitation permitted for synchronization, a control code insertion part 2 which inserts the control code C to the (n+1)th bit of the character data D is attached, and a series signal S where the control code C is inserted is sent to one transmission line 100. At a reception side terminal station 20, a control code erasing part 4 is provided to detect the switching point edge of the code of each bit of a reception signal at a detection circuit 3, and to erase the control code C of one bit with a code opposite to that of the (n+1)th bit after continuing the same code by the constant number (n) from the bit code of a switching point. Thereby, the system is the one to transmit the code as the series signal S resistant for synchronizing step-out, and synchronism can be always maintained, and the erroneous recognition of the character data can be prevent occurring at the reception side even when the bit length is long.</p> |
