| 摘要 |
A facsimile signal is compressed by skipping the continuous white cells longer than a predetermined length, and the compressed facsimile signal is transmitted in an analog form. When some portion of a facsimile signal is deleted due to the absence of a black cell in said portion, an f-signal indicating the deletion of said portion is inserted at the head of the deleted portion. The amplitude of the f-signal is twice as high as the highest level of a picture signal thus a reception station can differentiate the f-signal from a picture signal. The compressed facsimile signal is modulated to an AM.PM.VSB signal (Amplitude Modulation-Phase Modulation-Vestigial Side Band Modulation), and is transmitted to a communication line. When the reception station recognizes said f-signal, a predetermined number of white cells are inserted automatically on a printing paper at the reception station.
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