| 摘要 |
A data transmission apparatus having unit modules connected in cascade in a plurality (x; 2<=x) of stages and a list converting means, wherein each of the unit modules has a recording and/or reproducing means, a first-list generating means for generating a first list indicating the data to be recorded in the recording and/or reproducing means, a second-list receiving means for receiving a second list indicating the data to be reproduced from the recording and/or reproducing means, and a data supplying means for supplying the reproduced data to the next stage unit module; the recording and/or reproducing means of each of the unit modules records the data indicated in the first list generated by the first-list generating means among the data supplied from the outside and reproduces the data indicated in the second list received at the second-list receiving means; and the list converting means converts a first list generated by a first-list generating means of a y(2<=y<=x)th stage unit module to a second list and outputs the same to the second-list receiving means of all unit modules or some unit modules of the (y-1)th stage.
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