SECONDARY SCANNING DIRECTION CONTRACTING TRANSMISSION SYSTEM OF FACSIMILE TRANSMITTER

摘要

PURPOSE:To contract the subscanning direction, by transmitting dummy codes larger than the number of transmission bits of a line by every N lines. CONSTITUTION:The signals equivalent to a line supplied from the reading circuit 1 are written successively into the line memories 2 and 3 and alternately. The signals in the memories 2 and 3 are led into the coding circuit 6 alternately. The circuit 6 writes the coded picture signal of the mN-1st line into the buffer memory 9 and then produces the dummy codes with one-to-minimum transmission bit number from the dummy signal generating circuit 13 to write them into the memory 9 following the code of the mN-1st line. Then the memory control circuit 4 controls the memories 2 and 3 to lead the picture signal of the mN+1st line into the circuit 6. As a result, no decoding of the receiver side is carried out between the dummy codes of the N-1st line and the N-th line each. Thus a reproduced picture contracted in the subscanning direction is obtained.