公开(公告)号：US3810155A

公开(公告)日：1974-05-07

申请号：US21761072

申请日：1972-01-13

Applicant: ERICSSON TELEFON AB L M

Inventor： WIDL W ,  KARLSSON S

IPC: H04L25/49 ,  H04L3/00

CPC classification number: H04L25/4908

Abstract: The present invention relates to a method of coding a data flow carrying binary information in a local transmission equipment. The data flow comprises two kinds of data signal elements and control signal elements, whereby an optional polarity on the line terminal of the transmission can be selected. The coding method uses four different binary code words 0101, 1010, 0011 and 1100, so that the first kind of the data elements corresponds to one of the code words 0101 or 1010 and the other kind of the code words corresponds to one of the code words 0011 and 1100. One or the other of the code words is selected so that more than two of the code words will not follow one another upon the coding of more than two data elements of the same kind.

Abstract translation: 本发明涉及在本地传输设备中编码携带二进制信息的数据流的方法。 数据流包括两种数据信号元件和控制信号元件，由此可以选择传输线路终端上的可选极性。 编码方法使用四个不同的二进制码字0101,1010，0011和1100，使得第一类数据元素对应于代码字0101或1010中的一个，并且另一种类型的码字对应于码中的一个 单词0011和1100.选择一个或另一个代码字，使得在编码多于两个相同类型的数据元素时，两个以上的代码字将不会彼此跟随。

公开(公告)号：US3729590A

公开(公告)日：1973-04-24

申请号：US3729590D

申请日：1972-01-20

Applicant: ERICSSON TELEFON AB L M

Inventor： WIDL W ,  MATTSSON O

IPC: H04B14/02 ,  H04J3/04

CPC classification number: H04B14/02

Abstract: A method and an apparatus, respectively, for transmitting a data flow by means of a PCM-flow from a transmitter terminal to a receiver terminal, the bits of the data flow being timed to the bits of the PCM-flow during a selected time slot and the bit rate of the data flow that is regenerated at the receiver terminal being precisely equal to the bit rate of the data flow at the transmitter terminal. This is accomplished according to the principle of the invention by dividing the data flow at the transmitter terminal into short and long groups of bits which alternate with each other and which are mutually identified by means of at least one identification bit joined to each one of the bit groups, and by having at least two control information bits that indicate whether synchronism, lagging or leading respectively exists for the data flow in relation to the PCMflow, joined to the short bit groups so as to drive at the receiver terminal a bit timing pulse generator into synchronism with the data flow at the transmitter terminal.

Abstract translation: 分别用于通过PCM流从发射机终端向接收机终端发送数据流的方法和装置，在所选择的时隙期间数据流的比特被定时到PCM流的比特 并且在接收机终端处再生的数据流的比特率正好等于发射机终端的数据流的比特率。 根据本发明的原理，通过将发射机终端处的数据流划分为彼此交替的短和长组比特，并且通过连接到每个的每一个的至少一个识别比特来相互标识来实现本发明的原理 并且通过具有指示对于连接到短位组的与PCM流相关的数据流的同步，滞后或前导的至少两个控制信息位，以便在接收机终端处驱动一点 定时脉冲发生器与发射机端的数据流同步。