公开(公告)号：US3748393A

公开(公告)日：1973-07-24

申请号：US3748393D

申请日：1971-01-18

Applicant: INT STANDARD ELECTRIC CORP

Inventor： BAXTER J

IPC: H04J3/06 ,  H04J3/10 ,  H04J3/12 ,  H04L12/52

CPC classification number: H04J3/125 ,  H04J3/0614 ,  H04J3/10 ,  H04L12/525

Abstract: An arrangement to substitute data bits for and extract these data bits from at least one channel of a PCM-TDM intelligence (voice) communication system. The data bits do not have to be synchronized with the normal PCM bit stream. The normal PCM bit stream employs n bit positions, one bit position being employed for signalling and/or synchronization and (n-1) bit positions being employed for conveying intelligence. Data bits equal to or less than (n-2) are substituted for intelligence in a selected PCM channel. The data bits are grouped at one end of the (n-1) bit positions and a marker bit is inserted into a bit position adjacent the last data bit. The location of the marker bit in the (n-1) bit positions indicates the number and repetition rate of the data bits. The position of the marker bit within the (n-1) bit positions is employed in the receiver to extract the data bits from the PCM bit stream and to return the data bits to their original repetition rate for further utilization.

Abstract translation: 用于从PCM-TDM智能（语音）通信系统的至少一个信道取代数据比特并从其中提取这些数据比特的装置。 数据位不必与正常的PCM位流同步。 正常PCM比特流采用n个比特位置，一个比特位置用于信令和/或同步，（n-1）比特位置用于传送智能。 等于或小于（n-2）的数据位代替所选PCM通道中的智能。 数据位在（n-1）位位置的一端被分组，并且标记位被插入与最后数据位相邻的位位置。 （n-1）位位置中的标记位的位置表示数据位的数量和重复率。 在接收机中采用（n-1）比特位置内的标记位的位置从PCM比特流中提取数据比特，并将数据比特返回到其原始重复率以供进一步利用。