| 摘要 |
PURPOSE:To transmit accurately a data in a high speed by comparing an input data of a data input section with a corresponding data of an input data storage section in a transmission terminal station at each prescribed period and transmitting a data from which a difference is detected with priority. CONSTITUTION:Let data of a data input section 7 be D11-D101 at the point of time of first transmission, then the data is compared with each data of an input data storage section 14 at a data checking section 13 and since there exist no coincident data, the data D11-D101 are stored in an input data storage section 14, a code identifying the result is stored in the A, a numeral value of the D11-D101 is stored in a data B, the data D11-D101 is fed similarly as change information C, which is transmitted with a check bit added. If only the data D3 is different in the next point of time of transmission, a D32 is used as the data B, and D32-D31=C32 is transmitted as the changing information C. A receiving section reads the D31 from a preceding data storage section 16 from data blocks A, B and C and stores it to the storage section 16 as the D32. |
