Image signal converter in facsimile

Claim 1

An image signal converter in a receiver of a facsimile system, which comprises:: a demodulator for demodulating a facsimile signal carrying an image signal so as to separate said image signal from said facsimile signal, said image signal being produced through horizontally and vertically scanning an optical image and mixed with a synchronizing pulse train so that said image signal is constitutied by a plurality of successive horizontal line signals; a separator for separating said synchronizing pulse train from said image signal; a read-in pulse generator for producing read-in pulses in dependence on said synchronizing pulse train; a read-out pulse generator for producing read-out pulses; a memory circuit for memorizing said successive horizontal line signals and reading out the memorized horizontal line signals in response to said read-in and read-out pulses, said memory circuit including a timing controller for producing a start signal in response to said read-in or read-out pulses, an address indication pulse generator for producing an address indication pulses, a counting mode controller for producing an addition or subtraction mode signal, an address indication counter for counting said address indication pulses in addition mode when received said addition mode signal and in subtraction mode when received said subtraction mode signal and for producing an address indication signal when having counted a predetermined number of said address indication pulses, a memory driver for producing a memory drive signal when received both said start signal and said address indication signal, a memory for memorizing said horizontal line signals when received said memory drive signal and read-out means for reading out the memorized horizontal line signals when received said read-out pulses; and an endless recorder for successively recording the read-out horizontal line signals from said memory circuit.