| 摘要 |
PURPOSE: To detect and correct an error on transmission of data blocks where the order is irregularly changed by detecting and correcting inconsistency between interface languages on the transmission side and the reception side due to exchange between interface languages and an error like introduction of a language other than interface languages. CONSTITUTION: A pseudo random symbol string(PRS) generator 3 is advanced by one bit each time when the tail of each data block is outputted by a data block generator 1. In accordance with its output 5, a switch 4 selects DD0 language of an output line 7 in the case of '0' of the output bit from a PRS generator 3 and selects DD1 language of an output line 8 in the case of 'l' of the output bit from the PRS generator 3. A data block generator 1 advances an interface language generator 2 through a connection point 9 bit by bit. DDi language is sent to an interface language insertion device 10, which has a function to insert DDi language to the tail of a data block as an index, and is sent to the outside. Thus, error is detected and corrected. |
