| 摘要 |
A start of message generator for a facsimile system for selecting a specific mode of operation from any of a plurality of available modes, each of the modes having a discrete code, apparatus for encoding the selected mode with its respective code, a synchronizing word generator for generating a start of message (SOM) synchronizing word (SYNC), a clock generator for generating a selected number of clocks corresponding to the encoded selected mode, a sequencer including apparatus for enabling the synchronizing word generator for a predetermined number of clocks whereby a SOM SYNC is generated, apparatus for enabling the clock generator immediately after the SOM SYNC has been generated, whereby the selected number of clocks will be generated by the clock generator, apparatus for enabling ythe synchronizing word generator immediately after the selected number of clocks has been generated by the clock generator for a predetermined number of clocks whereby a second SOM SYNC is generated and a start of message decoder including a synchronizing word detector for detecting the first and second SOM SYNCS and counting the number of clocks therebetween and apparatus for decoding the number of clocks therebetween into one of the available modes.
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