JPS57184367A - Facsimile receiver - Google Patents

Abstract

PURPOSE:To avoid the recording to the undesired signal such as the noise, etc., by writing an image signal into a memory on the line decided as the image signal and writing the insignificant signal into the memory on the line when it is decided that the line is not the image signal respectively. CONSTITUTION:The signal demodulated by a demodulating circuit 1 for received signal is led to the 1st and 2nd memories 3 and 4 via an AND gate 2. The memories 3 and 4 consist of the RAMs into which the demodulated signals are written alternately and with every n-lines, While either one of these memories is in the write mode, the other memory is controlled to the read mode. A control circuit 5 comprises a microprocessor which performs the switching, etc. of the memory with every n-lines. An image signal carrier detecting circuit 6 detects the presence or absence of the image signal carrier in the received signal led to the circuit 1 for each line and then decides whether the received signal of each line is the image signal or not. For the line decided as the image signal, the image signal is written into the memory circuit 3, and the contents of the circuit 3 is read out in the write mode of the memory circuit 4. An insignificant signal is written in the non-signal mode.