encoder and decoder IC for ir remote

[NoOne]

Hi
I want to make a remote (only use 1 to 4 button) but I havn't found a suitable IC for encoder and decoder correspond code. There're many kind of IC but they also used for much button remote or if using the microcontroller, the price is high.
If anyone know the price of some small PIC (little pins), please show me (with their prices)
Thanks very much

[JIMKIZOS]

i dont construct any of this , but try this circuits ...
maybe you need some translation to the text , some is in german and the other i thing is in tourkish ..