Originally Posted by howcass /forum/post/12954115
thanks for the quick reply. so if this is the case then what surround mode should i be using on the tx-sr705? and should i be using lpcmor bitstream on the ps3?
Originally Posted by King Maq /forum/post/12955918
when i look at the display for the ps3 , it shows 4.6 mbps for uncompressed pcm vs 3.0 for Dolby Tru HD. So why would Dolby Tru HD be better than uncompressed? Any answers? I'm confused Everyone seems to want a new reciever to decode DD Tru HD when you can still pass the uncompressed signal thru optical and it says it has a higher bitrate . Am i missing something here?
Originally Posted by MichaelJHuman /forum/post/12956448
I have no clue exactly what the PS3 is displaying, but I wanted to clarify a few things.
TrueHD is 100% capable of the same fidelity as PCM. TrueHD can compress 192khz/24 bit PCM. I believe this is the same limit as both HDMI PCM transmission and what can be stored on a Blu-ray disc.
In practice, a lot of soundtracks appear to be 48khz/24 (or perhaps 20, I am not sure.) That same uncompressed soundtrack can be compressed losslessy to TrueHD, and then uncompressed back to the IDENTICAL PCM soundtrack.
TrueHD has an advantage over uncompressed PCM, when used to store a soundtrack on a disc - it takes up less room with NO loss of fidelity.
As for the whole argument of whether it's better to decode in the player, or the receiver, that's complicated by whether you need player side audio mixing, whether you have bass management issues, or whether you believe bitstream audio is less likely to have jitter. None of that matters for the PS3, because you are STUCK with player side decoding and sending the data as HDMI/MPCM.
Pragmatically, HDMI/MPCM works just fine with no loss of fidelity. DTS-HD Master Audio being the one exception. The PS3 can only decode the core portion, and can't send it as bitstream either.
Originally Posted by King Maq /forum/post/12967195
Thanks So basically are you saying that uncompressed and Tru hd sound the same- with the advantage that tru hd takes up less room?