dolby Truhd with 3 speakers

[saprano]

hey guys its me again in need for some more info, i have a ps3 as my blu-ray palyer and the setup in my sig. the thing is i only pick up 3 speakers for now,(money) 2 fronts and a center then later on ill get the rest. ok so my question is will i be able to listen to truhd? or any uncompressed pcm tracks? or do i need a 5.1 setup for that?. and i know the ps3 does'nt have dts-hdma yet, but whats the differint between that and a english pcm track? its still uncompressed right, and can the ps3 decode these english pcm tracks?.