机载选择呼叫系统主要运用于地面塔台并通过高频或甚高频通道与某架特定飞机进行定向呼叫.根据机载选择呼叫系统所具备的功能进行......

This paper proposed improvements to the low bit rate parametric audio coder with sinusoid model as its kernel. Firstly, ......