| 摘要 |
The invention relates to a PCM communication apparatus which encodes an input signal on each of a plurality of channels according to a predetermined encoding rule and multiplexes the encoded data on the respective channels. …<??>The apparatus comprises a plurality of channel units (1, 2, 3) each including encoding means (6) for encoding an input signal according to the encoding rule and, while the input signal is absent, generating a particular code, and code converting means (7) responsive to an output of said encoding means (6) for inverting codes of those bits which correspond to ZERO code positons of said particular code, and a multiplexer unit (12) including means for pulling up data lines (100) to which said channel units (1, 2, 3) are individually connected, a plurality of code reconverting means (9) each for reinverting those codes at bit positions which are to be inverted by said code converting means, and multiplexing means (10) for time division multiplexing outputs of said code reconverting means (9). The PCM communication apparatus reduces construction cost and space requirement. |
