decoder
/ˌdiːˈkəʊdə(r)/noun
1- a person or thing that analyses and interprets something, in particular译码员; 解码器, 尤指：
1.1
- an electronic device for analysing the information components of an audio or visual signal and feeding them to separate amplifier channels电子声像解码器。
1.2
- an electronic device that converts a coded signal into one that can be used by other equipment, especially a device to decode satellite television signals电子译码器（尤指卫星电视信号解析设备）。