Originally Posted by Dixie Flatline
The question is really about audio output modes on the PS3, not the audio formats on the disc. The audio track on the disc is either Linear PCM or a compressed format (which can be lossy, like DD/DTS, or lossless, like DD TrueHD or DTS-MA).
If you set the PS3 to output bitstream, then it will send exactly what's on the disc without modifying it at all, and it's up to your receiver to decode whatever needs decoding. If the PS3 is set to output PCM, then it will decode compressed formats into Linear PCM and send that LPCM stream to the receiver.
When you've selected a PCM soundtrack from the disc, then the PS3 will be sending PCM to the receiver regardless of the setting. However, as mentioned above, if the PS3 is set to bitstream then it won't be able to make any changes to the audio stream, such as mixing in menu sounds.
At this point, there's really no reason to select bitstream output on the PS3 unless your receiver has problems receiving multichannel PCM via HDMI. The PS3 is perfectly capable of decoding any of the available audio formats except DTS-MA (which is currently neither decoded nor passed as bitstream), and you get the ability for it to mix in additional audio.
The BD format is really designed for the player to do audio decoding anyway; the ability to pass the HD audio formats (DD TrueHD and DTS-MA) as bitstream to the receiver, which requires HDMI 1.3, is something that was demanded by the receiver manufacturers so that they could badge their receivers as "True-HD Capable" and "DTS-MA Capable". In reality, any receiver that can receive multichannel PCM over HDMI is capable of playing these formats, as long as the player does the decoding, which is what they're designed to do.
Question about DTS-HD Master Audio (via bitstream) vs. LPCM
Hello Dixie Flatline - I wonder if you help explaining this for me...
I appreciate your help in advance but me and my brother-in-law have an ongpoing debate and we were wondering if good and knowledgable folks from AVS forum, could help us with it.
Here is the deal, I have Samsung BD-1400 and my brother-in-law has a Sony BDP-300.
When we play a Blu Ray disc that is mastered in DTS-HD Master Audio 5.1 in our respective players, I enable bitstream on Sammie 1400 and push onto Denon AVR-988 and DTS-HD Master audio comes on in its full glory as that Denon reciever decodes the bitstream and displays DTS-HD Master audio on its front pannel. I believe this is the best way to get full DTS-HD Master audio from my setup.
Now the question that started this whole debate between us, is as follows: when my brother in-law plays the same disc that is mastered in DTS-HD Master Audio 5.1 on his Sony-BDP300 he has 2 options to choose on that player: bitstream and lpcm
1) when he chooses bitstream, we both think that the most he gets from that DTS-HD Master Audio track id core only DTS at 1.5Mbs ?? This is a lossy DTS codec that is inferior to full DTS-HD Master Audio 5.1 Can someone confirm that so we know that our assumption is valid ?
2) Now , onto the LPCM option - the whole source of this debate. My brother in-law is convinced that when he switches to LPCM option on his Sony-BDP300 Blu Ray player, he gets a much better sounding soundtrack (his reciever displays MPCM) and he is convinced that the quality of sound that he is getting via LPCM is identical to DTS-HD Master Audio I am getting on my Samsung 1400 when I use bitstream option.
Here are our questions:
1) Is that possible and if so how does this work ?
2) Why is the quality of the sound , sounds so much better with LPCM option vs. Bitsream on his Sony BDP-300 ?
3) What kind of the bit rates (for audio) will there be when LPCM is chosen ?
4) I thought that the only way to get the full DTS-HD Master Audio 5.1 was to either use on board decoding within Blu Ray player or via bitstream to capable reciever such as Denon AVR 988 > Could this be Sony best kept secret and if so , why would they keeep it quiet about this potentially exciting feature ?
Thanks very much for listening and answering
P.S> My brother-in-law had a Yamaha reciever V1800 and he is using HDMI from Sony BD player.