You're gonna have to buy a standalone bluray player for bitstream DTS HD and true HD. The ps3 only decodes the HD audio and transmits it as pcm. Your receiver will only show multi in..
I , like you, bought a new receiver that decodes DTS HD and true HD. I ended up buying a Samsung 3d bluray player and believe me, the video and audio quality increase is phenomenal! Plus, my new denon displays and plays the DTS hdma audio and true HD as its supposed to.