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英国邮政局与剑桥顾问有限公司(CCL)为设计一种数字语言插入(dsi)设备签订了一项经费达12万英镑的研制合同.本设备计划安装在英国古恩希利地面站,作为国际时分多址卫星通信系统的一部分. 数字语言插入技术是根据电话通话所测出的统计特性而设计的,即在规定数量的多组通话者情况下,任一瞬间实际上仅有约三分之一的时间在进行通话.该设备就利用这一特性,采用监视输入电话线路方法,仅在电话线路语言激活时能动地将线路分配到卫星信道上.每个语言段都有一个联合指令,使接收机数字语言插入设备沟通交错段,最后到达正确的终点.这就是使所需卫星信道数目可减少一半的能动
The UK Post signed a £ 120,000 development contract with Cambridge Consultants Limited (CCL) for the design of a Digital Language Insertion (dsi) device, which is scheduled to be installed at the Goodchurnian Earth Station in the United Kingdom as part of an international time division Site satellite communication system.Digital language insertion technology is based on statistical characteristics measured by telephone calls designed that in the case of the provisions of the number of groups of callers, at any moment in time is only about one-third Time to talk, the device takes advantage of this feature by using a method of monitoring incoming telephone lines that can be dynamically assigned to satellite channels only when the telephone line language is activated, and there is a joint instruction in each language segment that allows the receiver Digital speech insertion devices interleave the segments and finally reach the correct end, which is the ability to reduce the number of satellite channels needed by half