| 摘要 |
A digital transmission system of a type in which a digitally-modulated transmission signal is mapped to two-dimensional data and transmitted from at least one relay point, and at a reception side, the two-dimensional data is identified and reproduced into the transmission signal. The system includes first and second memories provided in the relay point for alternately writing and reading transmission signal display information to display a transmission status of the transmission signal, and also includes a display data transmitter for alternately reading and transmitting the transmission signal display information. In the reception side, a display data reception circuit has third and fourth memories for receiving the transmission signal display information and performing write, read and output operations. The circuit alternately reads and outputs the transmission signal display information.
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