Code converting system for facsimile signal

Abstract

Abstract PURPOSE:To prevent the drop-out of the isolated signal for the code conversion of the AM-PM-VSB system, by adding the ajoint signal smaller than the original signal before and after the isolated signal. CONSTITUTION:The input facsimile signal F is transmitted after receiving the VSB modulation via the 2/3 (digital binary/digital ternary) converter 11, waveform converter 31, LPF12, the mixer 13 and the VSB filter 14 each. At the waveform converting circuit 31, the ajoint signal smaller than the isolated signal is added before and after the isolated signal of the facsimile signal received the 2/3 conversion. With this addition of the ajoint signal, the envelope including the isolated signal increases. Thus the occurrence of the identification error can be reduced.

Inventors

• 👤 Tatsuki Hayashi
• 👤 Toshiyuki Yamamoto

Bibliographic Details