Quote:
Originally Posted by
Q of BanditZ 
Is this pretty much standard or are there any players that don't have that "limit" of 96KHz for DTS-HD MA?
That's a good question. It certainly appears that the PS3 will decode 5.1/192 kHz DTS-HD MA (according to Neuro's observations), but I have no idea about other players.
Quote:
Originally Posted by
jam88 
It's a pity that it down-samples from 192KHz to 96KHz. Neuro mentioned in an earlier post that it's as a result of lack of processor power.

BTW, does anybody know what processor the 83 uses?
Obviously the PS3 has more processor power, but being so fast, I imagine that the BDP-83 has fairly powerful processors as well. If some other "lesser" players can decode 5.1/192 kHz DTS-HD MA, the reason would most likely be an ASIC/FPGA-based decoder as opposed to firmware like on the BDP-83, I would think.
Quote:
Originally Posted by
Bob Pariseau 
The only limit is 7.1 DTS-HD MA decoding. That is limited to 96KHz/24bit.
As best I know, 192KHz is supported for everything else.
Even for 5.1 DTS-HD MA and 7.1 Dolby TrueHD soundtracks? The latter is indicated in the BDP-83 manual, but it contradicts what Dolby says about TrueHD...then again, since it seems that we can't trust everything DTS says, we can't trust everything Dolby says either.

Quote:
Originally Posted by
Princess Aurora 
What you suggest is a catch-22. In order to downsample a 192 kHz stream to 96 kHz, the audio would have to be decoded first. For one, an encoded/compressed (even losslessly) stream has no sampling rate, per se. Further, even if it did, the Oppo would have to be capable of operating directly on the bitstream of a DTS-HD MA track, which nothing does (nothing even operates on simple and tiny Dolby Digital bitstreams). Thus, to downsample to enable decoding, the player would have to decode the audio.
I understand what you're saying and it makes sense per se, and I don't claim to know how DTS-HD MA actually works, but I suppose it is possible that 192 kHz lossless is implemented as a layer on top of 96 kHz lossless, much like how the latter is layered on top of a lossy DTS core (such layering is the reason that DTS-HD MA is so computationally expensive in the first place). If this is the case, then players that do not or cannot support 5.1/192 kHz could simply ignore some of the data and still produce lossless output at 96 kHz (sort of like how the rear channel can be omitted when decoding DTS-ES 6.1 Discrete soundtracks).
Quote:
Originally Posted by
Princess Aurora 
What would happen is that the player would simply access the DTS lossy core, since it would not be capable of decoding the full lossless stream.
I certainly hope that this is not the case.
Quote:
Originally Posted by
Princess Aurora 
I think DTS-HD MA is limited to 96/24 on Blu-ray at 7.1 channels as a whole, not just in the Oppo.
Correct, as far as I know (at the moment), but we're talking about 5.1 channels.
Quote:
Originally Posted by
Princess Aurora 
Of course, Dolby TrueHD is supported on BD at only 18 Mb/s, and can run at 5.1 192/24. That's the same 70% compression ratio that is problematic from above.
That was my understanding, but the BDP-83 manual says that 7.1/192/24 is also supported. Either Dolby has upped the ante once again without updating their website or the BDP-83 manual needs to be revised regarding this matter.
Quote:
Originally Posted by
tommypeters 
Yes, 24/96 is totally unlistenable, isn't it...?
For me at least, it's a matter of principle and truth in advertising (in addition to curiosity). I also wish to know positively whether 5.1/192 soundtracks are downsampled but otherwise lossless or simply a decoding of the lossy core (yikes!). Even the worst case is hardly a deal-breaker for me personally, but others may feel differently.