| 摘要 |
Four channels of group 3 facsimile signal are transmitted through a digital transmission line of Bearer rate 64 Kbits/s for a speech signal. A facsimile signal is separated into a tone signal, a binary control signal, and a picture signal, each converted to digital form. Then, a block having 160 bits is assembled including 96 data bits and some control bits, and a justification bit. A justification bit matches clock rate of the present system with clock rate of an external digital transmission line by deleting or inserting one bit in a block. Thus, a conventional group 3 facsimile device is coupled with 16 Kbits/s digital transmission line with no design change for the facsimile device itself.
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