TRANSMITTING SYSTEM OF DIGITAL SIGNAL

摘要

PURPOSE:To superpose a low-speed digital signal coded to a CMI on a CRV and to transmit them, by applying the CRV when a high-speed digital signal is coded to a CMI. CONSTITUTION:CMI codings 511 and 503 are carried out for a high-speed digital signal 101 and a low-speed digital signal 501 respectively. The high-speed data is set at ''1'' (or ''0'') every time ''1'' (or ''0'') emerges in a low-speed CMI code A. When this high-speed data is set at ''11'' (or ''00'') through CMI coding, the data is contrarily coded to ''00'' (or ''11''). Thus the high-speed data is set at ''0'' (or ''1''). When this data is set at ''01'' (or ''10'') through CMI coding, a CRV506 is applied once to code the data contrarily to ''10'' (or ''01''). As a result, a low-speed CMI code is superposed on a high-speed CMI code and then transmitted.