In the second part , the focuses are put on the methods of realization of atc instruction speech recognition , automatic pilot reply text - to - speech , management of sky talk dialogue and aircraft state feed back display 第二部分重点研究了本系统的管制指令语音识别、自动机长语音合成、陆空通话管理器和飞行信息反馈显示四个模块的具体设计方法及过程。
D - atis and d - volmet was put into operational use in april 2001 , while pdc delivery via data link was put into use in december 2001 . instead of delivering the information by voice broadcast , these services allow direct displayprintout of relevant airfield and weather information as well as atc instructions in the cockpit via data transmission , and hence help reduce the workload of controllers and pilots , as well as enhance data accuracy 自此以后,有关飞行区和天气的资料及航空交通管制指示,便可以透过数据传送方式,在飞机驾驶舱内直接显示或列印出来,而无须再以声音播放这类资料,这些服务既能够减低航空交通管制员和飞行员的工作量,亦可提高数据的准确度。