| 摘要 |
In a digital signal transmission system wherein input digital signals having an arbitrary bit rate are converted into digital signals of a bit rate higher than that of the input digital signals and then transmitted through a signal format converter; in order to realize the signal format conversion in real time the signal format converter is constructed of a buffer circuit of small capacity, a circuit which writes the input signals into the buffer circuit at the bit rate of said input signals and which reads out the written signals at the bit rate of a transmission line, a circuit which distinguishes the signals to-be-read as a mark, space and empty, and an encoding circuit which converts the mark, space and empty into pulse signals discernible with the unit being a time slot of the transmission line or integral times the time slot, in dependence of the levels of pulses or the numbers of successive pulses (run length).
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