Games to use Compressed Lossless eventually?

[Luis_A51]

Originally Posted by Pelican170

Well, my question is, if i LPCM sound to my reciever and it always shows Multichannel PCM, how can i ever really know if its playing a lossy track or not? Besides just listening to it. Games should definately have an audio selection like movies if they are using uncompressed sound...

Becuase the consensus is that the PS3 DOES NOT DECODE ANYTHING during gaming. Therefore if you're getting LPCM on your receiver it would HAVE TO BE uncompressed PCM on the disk.

[Luis_A51]

Originally Posted by WriteSimply

I so want to be sarky right now.

Here's what's happening with soundtracks on DVD:
Final lossless mix-> Encode to DTS or DD-> 5.1/7.1 Lossy sound

Here's what's happening with soundtracks on most BDs:
Final lossless mix-> Encode to DTS HDMA or Dolby TrueHD-> 5.1/7.1 Lossless sound
Final lossless mix-> No encoding for 5.1 LPCM -> 5.1/7.1 Lossless sound

A game's sound mix is mixed on the fly using the three sound elements. Once that is mixed, then it's a matter of delivering it to your receiver. Now if your receiver is already hooked up to your PS3 using HDMI and you have it set to PCM (so that you can hear the decoded signal from Dolby TrueHD and DTS HDMA), why would the PS3 need to encode the mix at all?

Why would it need to do this:
Final lossless mix-> Encode to DTS HDMA or Dolby TrueHD-> 5.1/7.1 Lossless sound

when it can just do this:
Final lossless mix-> No encoding for 5.1/7.1 LPCM -> 5.1/7.1 Lossless sound
And reduce computational stress of encoding? There is NO NEED for the PS3 to encode for DTS HDMA nor Dolby TrueHD - EVER.


fuad

Great to know.

Thanks faud

[Getus]

resistance, rainbow 1 & 2, uncharted, Cod4, oblivion, calling all cars, pain and super rub'a dub are 7.1 lpcm.
Devil may cry 4 is not.

But uncharted is the only game you can pick witch audio codec you want.

[Luis_A51]

Originally Posted by DefTechPioElite

well, if MGS4 has a DD mix and not PCM, that is why. I would rather have TrueHD than DD, but I would rather have PCM than any of them. But, if the PCM track is going to take up too much space(which it will eventually, all I gotta say other than MGS4 is FF13) I dont want a lossy DD track. Why is it harder for the PS3 to decode TrueHD vs DD?

You're not listening. In order to get trueHD the PS3 would have to encode everything in real-time into trueHD, which would be an incredible waste of processing power.

What faud was trying to say was the ps3 can either send the signal as uncompressed PCM, or ENCODE it into Dolby Digital for people that only have optical. Theres absolutely no reason to want trueHD for ps3 games.

[dk3dknight]

What might be simply to agree to is that regardless what comes out we are getting the directors intent on games.

Which is very important and 5 stars for everybody else.

[Ascended_Saiyan]

Originally Posted by Icemage

The process of compressing an LPCM signal into DD or DTS does take a little bit of horsepower, but the act of decoding the lossy results is actually quite easy, both because it's not hard to do in software, and because there's a lot of specialized hardware out there that handles this specific task.

Do you know which one is more computationally intense (DD or DTS)?

Er.. this isn't really the right way to describe it.

DTS-MA and it's internal DTS-1.5Mbps track can be liked to taking whole milk from a cow and skimming off the cream to produce low fat milk. The lowfat milk would be the DTS-1.5, and the cream would be the rest of the DTS-MA signal. If you mix the two back together, you get whole milk again; with DTS-MA, mixing the two back together gets you back your original LPCM signal, unmolested.

I was talking about DTS (768kbps and/or 1.5Mbps only). My thinking was that DTS doesn't even begin cutting any information until the maximum bandwidth is reached. Then, everything else is dropped. Do you believe this to be accurate?

Most certainly. Lossless codecs have to worry about being 100% accurate to the source. Lossy conversions, on the other hand, can simply do sampling to pull "enough" data to create the lossy signal.

I wondered because I've always thought the greater the compression the greater the power needed to do so.

It takes many times as much processing power to decode or encode DTS-MA or TrueHD compared to standard DD/DTS.

A lot more. The exact proportion depends on the complexity of the source audio, but I wouldn't be surprised if the average wasn't at least close to an order of magnitude (10x) as much processing power.

Interesting. Thanks.