Yea i know that transmitter encodes data, but ...
If you for instance wanna encode string in pc, and you wanna send string "Hello" encoded string may look "olleH" and you need decoder to get Hello from that.... But if I am wayting only 3 different possibile inputs incoming (like from my transmitter) I dont need to care how to decrypt the inputs, I just assaing 3 different inputs to 3 different buttons, and when i get for example input "xxx" or "yyy" or "zzz" i will know which string represents which button(like "xxx" is 1. , "yyy" is second...), and decryption is not need.
Or RF encoding works in a different way ?