JPS55149566A - Facsimile receiver - Google Patents

Abstract

PURPOSE: To record the specified white part independently of the presence of control signal, by locating two memories parallelly and inputting them to the memory with the clock selecting the demodulation signal.

CONSTITUTION: In case of the drum type facsimile, when the phase signal interval t2 is made longer as t2', the video signal time is compressed and the white part is extended. To prevent this, the memories 2, 3 are provided, two sets of clocks f₁, f₂ are prepared, and f₁<f₂ is taken. Thus, if the control signal is present, the video signal of the first one line is input to the memory 2 at the clock f₂, the switch S1 is selected, and the video signal of the next one line is input to the memory 3. While this, the video signal is read out at the clock f₁ from the memory 1 and input to the recording circuit 4 and recorded on the receiving paper on the drum 5 at the same time as usual case. When the readout is finished, the switch S2 is selected to the memory 3. That is, during the readout from the memory 2, the video signal of the next one line is input to the memory 3. Accordingly, the circuit 4 records the information one line before the transmitted line.

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