DTS-HDMA vs. Uncompressed PCM - Blu-ray Forum

mdm1699 · 04-10-2008, 06:08 PM

Quote:

Originally Posted by noneatall

Now that PS3 is getting updated with DTS-HDMA, could anyone really notice a difference between DTS-HDMA and Uncompressed PCM.

Not when comparing the two, since the PS3 will be converting DTS-HD to PCM. However, it is still necessary if there are movies that offer DTS-HD tracks but not PCM. The update ensures that you will always get high quality audio as long as it is offered on the disc................I think.

Pelican170 · 04-10-2008, 06:13 PM

Quote:

Originally Posted by mdm1699

Not when comparing the two, since the PS3 will be converting DTS-HD to PCM. However, it is still necessary if there are movies that offer DTS-HD tracks but not PCM. The update ensures that you will always get high quality audio as long as it is offered on the disc................I think.

Be aware, that when the DTS HDMA signal is sent via PCM, its not converting anything. PCM is a way of sending a signal, which will already be decoded by the PS3. So you are in fact listening to DTS HDMA

mdm1699 · 04-10-2008, 06:20 PM

Quote:

Originally Posted by Pelican170

Be aware, that when the DTS HDMA signal is sent via PCM, its not converting anything. PCM is a way of sending a signal, which will already be decoded by the PS3. So you are in fact listening to DTS HDMA

Thanks for clarifying. I am happy with the update but I have a question. If the DTS-HD signal is merely being decoded by the PS3 versus my Onkyo, I should not notice any difference if it was bitstreamed instead right?

Pelican170 · 04-10-2008, 06:24 PM

Quote:

Originally Posted by mdm1699

Thanks for clarifying. I am happy with the update but I have a question. If the DTS-HD signal is merely being decoded by the PS3 versus my Onkyo, I should not notice any difference if it was bitstreamed instead right?

Well, first, I am not totally sure the ps3 is going to be able to bitstream the DTS -HDMA, buuut, if it does there shouldnt be a difference. In my own opinion, id rather have the receiver do the decoding, since that is what a receiver is for..... Ive also heard rumors that if the ps3 decodes, the sound is "quieter" than when the receiver decodes, but i have no proof of this and shouldnt affect sound quality.

mdm1699 · 04-10-2008, 06:33 PM

Quote:

Originally Posted by Pelican170

Well, first, I am not totally sure the ps3 is going to be able to bitstream the DTS -HDMA, buuut, if it does there shouldnt be a difference. In my own opinion, id rather have the receiver do the decoding, since that is what a receiver is for..... Ive also heard rumors that if the ps3 decodes, the sound is "quieter" than when the receiver decodes, but i have no proof of this and shouldnt affect sound quality.

You put the issue to rest then ignited it again.

Edit your post and remove that portion and I will convince myself that it was never there.

HURRY!

Pelican170 · 04-10-2008, 06:39 PM

hahaha, sorry. either way, the clarity would be the same. just turn up the juice a little more!

Luis_A51 · 04-10-2008, 07:21 PM

PCM should sound the same as DTS-MA.

It has ABSOLUTELY NOTHING to do with the speakers/receiver you have (assuming the player does the decoding).

The only time they will sound different is if the audio engineer mixes the DTS-MA in a weird way. But technically speaking, they should be identical.

Remember, PCM is THE reference audio track. There is nothing better than pure PCM.

Sith · 04-10-2008, 07:23 PM

yeah but don't you need a receiver with hdmi in, i thought that uncompresed
audio couldn't be transmitted thru a optical cable?

supersix4 · 04-10-2008, 07:30 PM

well the point of this is that now instead of having just a standard 5.1 dts 1.5mbps track it will now be on par with PCM

JasonR · 04-10-2008, 07:31 PM

Sticky: https://forum.blu-ray.com/showthread.php?t=40821

beavis667 · 04-11-2008, 02:25 PM

Audio quality wise it will be the same between PCM and DTS-MA. However channel levels will vary between the two.

welwynnick · 04-11-2008, 07:08 PM

Quote:

Originally Posted by beavis667

Audio quality wise it will be the same between PCM and DTS-MA. However channel levels will vary between the two.

Why? Is that because the bits are the same?

Nick

dialog_gvf · 04-11-2008, 09:50 PM

Quote:

Originally Posted by beavis667

Audio quality wise it will be the same between PCM and DTS-MA. However channel levels will vary between the two.

Assuming there is no mucking about at all.

The Dolby TrueHD encoder has a DN (Dialogue Normalization) setting that messes with the input, and has been the cause of people complaining that the LPCM was better than TrueHD.

Gary

Memnoch · 04-10-2008, 06:37 PM

I have one of the first 605s to hit the market WAY back with they were up for preorder. I am pretty sure I don't have the newest firmware update for the 605. I was under the impression that the firmware update fixed some decoding issues with this DTS-HDMA stuff so I was going to wait until the PS3 could actually bitstream DTS-HDMA to the receiver to bother upgrading it. So since we are getting that capability in a week, do I need this upgrade?

Icemage · 04-10-2008, 06:40 PM

Quote:

Originally Posted by Memnoch

I have one of the first 605s to hit the market WAY back with they were up for preorder. I am pretty sure I don't have the newest firmware update for the 605. I was under the impression that the firmware update fixed some decoding issues with this DTS-HDMA stuff so I was going to wait until the PS3 could actually bitstream DTS-HDMA to the receiver to bother upgrading it. So since we are getting that capability in a week, do I need this upgrade?

The PS3 won't be bitstreaming DTS-HD MA. It will be decoding it and sending it out as PCM over HDMI.

If you're using a PS3 as your player over HDMI, the DTS decoding capability of your player never comes into play, so whether it works or not, you'll never know nor care because it'll be receiving a PCM signal from the PS3.

Pelican170 · 04-10-2008, 06:42 PM

Quote:

Originally Posted by Icemage

The PS3 won't be bitstreaming DTS-HD MA. It will be decoding it and sending it out as PCM over HDMI.

If you're using a PS3 as your player over HDMI, the DTS decoding capability of your player never comes into play, so whether it works or not, you'll never know nor care because it'll be receiving a PCM signal from the PS3.

This is not true, like i said before, it sends the decoded DTS-HDMA signal via PCM, which is a way of sending a signal, not to be confused with Lossless audio Uncompressed PCM

Luis_A51 · 04-10-2008, 07:22 PM

Quote:

Originally Posted by Memnoch

I have one of the first 605s to hit the market WAY back with they were up for preorder. I am pretty sure I don't have the newest firmware update for the 605. I was under the impression that the firmware update fixed some decoding issues with this DTS-HDMA stuff so I was going to wait until the PS3 could actually bitstream DTS-HDMA to the receiver to bother upgrading it. So since we are getting that capability in a week, do I need this upgrade?

PS3 wont bitstream. It will send it as PCM.

CptGreedle · 04-10-2008, 06:50 PM

Yeah, the PS3 does not Bitstream DTS-HD MA, it will internally decode it into PCM and stream that to the receiver. it will sound the same since they essentially the same information, just encoded differently.
This means that all our DTS HD MA movies that do NOT have PCM or TrueHD will finally be lossless on the PS3.

Break out the Fox and NewLine titles.

Pelican170 · 04-10-2008, 06:55 PM

Quote:

Originally Posted by CptGreedle

Yeah, the PS3 does not Bitstream DTS-HD MA, it will internally decode it into PCM and stream that to the receiver. it will sound the same since they essentially the same information, just encoded differently.
This means that all our DTS HD MA movies that do NOT have PCM or TrueHD will finally be lossless on the PS3.

Break out the Fox and NewLine titles.

I dont agree with this either. How is the ps3 going to decode the DTS-HDMA, then convert it to a Uncompressed PCM file, then decode that then send? If you look, press select when LPCMing DD True HD. Its shows what is being decoded and sent via pcm to the receiver. It will say DD True HD, which is what is being heard. If im wrong, please explain...

JasonR · 04-10-2008, 06:58 PM

TrueHD and DTS-HDMA are basically zip files. The PS3 unzips them, decodes them, and sends them via LPCM to the player. No bitstreaming involved.

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04-10-2008, 06:39 PM	#6
Pelican170 Blu-ray Samurai Member since:Jul 2007 Location:Newtown, CT 4K collection:127 Blu-ray collection:735 DVD collection:256 Trading Score:13	hahaha, sorry. either way, the clarity would be the same. just turn up the juice a little more!

04-10-2008, 07:21 PM	#7
Luis_A51 Blu-ray Guru Member since:Jun 2007 Location:Calgary, AB Blu-ray reviews:4	PCM should sound the same as DTS-MA. It has ABSOLUTELY NOTHING to do with the speakers/receiver you have (assuming the player does the decoding). The only time they will sound different is if the audio engineer mixes the DTS-MA in a weird way. But technically speaking, they should be identical. Remember, PCM is THE reference audio track. There is nothing better than pure PCM.

04-10-2008, 07:23 PM	#8
Sith Blu-ray Samurai Member since:Dec 2007 Location:Seal Beach, CA Blu-ray collection:168	yeah but don't you need a receiver with hdmi in, i thought that uncompresed audio couldn't be transmitted thru a optical cable?

04-10-2008, 07:30 PM	#9
supersix4 Blu-ray Archduke Top contributor Member since:Mar 2007 Blu-ray collection:572 Blu-ray reviews: 53 Trading Score:3	well the point of this is that now instead of having just a standard 5.1 dts 1.5mbps track it will now be on par with PCM

04-10-2008, 07:31 PM	#10
JasonR Super Moderator Top contributor Member since:Nov 2007 Trading Score:12	Sticky: https://forum.blu-ray.com/showthread.php?t=40821

04-11-2008, 02:25 PM	#11
beavis667 Active Member Member since:Aug 2007	Audio quality wise it will be the same between PCM and DTS-MA. However channel levels will vary between the two.

04-10-2008, 06:37 PM	#14
Memnoch Expert Member Member since:Jun 2007 Location:Northern VA 4K collection:185 Blu-ray collection:185 Trading Score:1	I have one of the first 605s to hit the market WAY back with they were up for preorder. I am pretty sure I don't have the newest firmware update for the 605. I was under the impression that the firmware update fixed some decoding issues with this DTS-HDMA stuff so I was going to wait until the PS3 could actually bitstream DTS-HDMA to the receiver to bother upgrading it. So since we are getting that capability in a week, do I need this upgrade?

04-10-2008, 06:50 PM	#18
CptGreedle Blu-ray Ninja Member since:Jul 2007 Location:Sworn super-hero now services Atlanta (and suburbs). Blu-ray collection:128 Blu-ray reviews:5	Yeah, the PS3 does not Bitstream DTS-HD MA, it will internally decode it into PCM and stream that to the receiver. it will sound the same since they essentially the same information, just encoded differently. This means that all our DTS HD MA movies that do NOT have PCM or TrueHD will finally be lossless on the PS3. Break out the Fox and NewLine titles.

04-10-2008, 06:58 PM	#20
JasonR Super Moderator Top contributor Member since:Nov 2007 Trading Score:12	TrueHD and DTS-HDMA are basically zip files. The PS3 unzips them, decodes them, and sends them via LPCM to the player. No bitstreaming involved.

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