| 摘要 |
1,033,398. Pulse code modulation systems. HITACHI SEISAKUSHO KABUSHIKI KAISHA. Nov.15, 1962 [Nov. 17, 1961], No. 43279/62. Heading H4L. In a time division multiplex P.C.M. system, at least one channel may carry different kinds of information, e.g. in telephony, speech, calling number or control signals. The first one or two bits in the time slots of this channel are accordingly used to indicate the type of information represented by the subsequent bits, and used at the receiver, after normal channel separation, to direct the channel signal to its appropriate utilization circuit. |
