question about audio - Blu-ray Forum

Grim Reaper · 07-01-2009, 05:48 AM

ide like to know. what is better? i know DTS HS-MA is better than those 2. cuz, some of my movies have both of those 2 audio types.

Dolby HD-MA
PCM 5.1

https://www.blu-ray.com/movies/movies.php?id=532 <---example of one of them

SlmShdy1 · 07-01-2009, 05:55 AM

Essentially, they're the same, but I like Uncompressed PCM.

Grim Reaper · 07-01-2009, 05:56 AM

im just wondering. cuz, ive always picked the Dolby/DTS HD-MA audio.

wormraper · 07-01-2009, 05:58 AM

*sigh

none of the 3 are any better than any of the others.

ALL 3 of the codes (DTS-HD MA, Dolby TrueHD and PCM) are LOSSLESS (meaning 0 loss of the master audio. DTS-HD MA and TrueHD are basically the exact same thing as PCM just "zipped" per se. and DTS-HD MA is NOT any better or effective than TrueHD, DTS-HD MA is just recorded at a slightly higher volume. IF you have two audio tracks in lossless on the same disc level matching the two tracks and comparing, you'll find there is no diff. Louder DOES NOT equal better

CasualKiller · 07-01-2009, 06:14 AM

TrueHD is better due to it's aerodynamic HD bits that allow it to fly through the HDMI cable at lightning speeds.

Travis · 07-01-2009, 06:31 AM

Quote:

Originally Posted by CasualKiller

TrueHD is better due to it's aerodynamic HD bits that allow it to fly through the HDMI cable at lightning speeds.

aerodynamic

Bruce Morrison · 07-01-2009, 07:14 AM

I agree that all three will sound identical after volume equalisation. The only argument in favour of using the DD TrueHD and DTS HDMA codecs is that they require less space on a BD compared with the equivalent PCM track, thereby freeing up more disc space for the video which can therefore be encoded at a higher bitrate. I assume that's why the major studios tend to use one of the audio codecs rather than PCM. (Also, of course, they have probably made deals with Dolby and/or DTS.)

But does anyone know the typical percentage savings in space that are gained by using DD TrueHD or DTS HDMA rather than PCM? In other words, if the PCM would require, say 5GB, what would each of the codecs typically require? I'd be interested to know how significant the saving is.

07-01-2009, 05:48 AM	#1
Grim Reaper Blu-ray Duke Top contributor Member since:Jun 2006 Location:Let Me In! 4K collection:499 Blu-ray collection:2022 DVD collection:25 Trading Score:13	question about audio ide like to know. what is better? i know DTS HS-MA is better than those 2. cuz, some of my movies have both of those 2 audio types. Dolby HD-MA PCM 5.1 https://www.blu-ray.com/movies/movies.php?id=532 <---example of one of them

07-01-2009, 06:14 AM	#5
CasualKiller Blu-ray Samurai Member since:Feb 2008 Location:Brooks Alberta Blu-ray collection:54 Trading Score:15	TrueHD is better due to it's aerodynamic HD bits that allow it to fly through the HDMI cable at lightning speeds. Last edited by CasualKiller; 07-01-2009 at 06:20 AM.

Similar Threads
thread	Forum	Thread Starter	Replies	Last Post
Audio Question concerning PS3 and obtaining 7.1 Audio	Audio Theory and Discussion	DarkEye	2	04-12-2009 01:20 PM
New...with audio question.	Newbie Discussion	Venaal	12	04-08-2009 02:30 AM
Blu-ray audio vs. DVD audio (not what you think the question is)	Audio Theory and Discussion	McGarnigal	2	12-30-2008 04:22 PM
Question About Audio	Audio Theory and Discussion	EazyWeazy3	5	11-07-2008 01:19 PM
Question Regarding Audio	Blu-ray Players and Recorders	thebluemax	4	03-08-2007 03:09 AM

07-01-2009, 05:55 AM	#2
SlmShdy1 Blu-ray Guru Top contributor Member since:Nov 2007 Location:Honolulu, HI PlayStation® PSN: SlmShdy1 Home Theater Gallery:39 Blu-ray collection:292	Essentially, they're the same, but I like Uncompressed PCM.

07-01-2009, 05:56 AM	#3
Grim Reaper Blu-ray Duke Top contributor Member since:Jun 2006 Location:Let Me In! 4K collection:499 Blu-ray collection:2022 DVD collection:25 Trading Score:13	im just wondering. cuz, ive always picked the Dolby/DTS HD-MA audio.

07-01-2009, 05:58 AM	#4
wormraper Blu-ray Archduke Member since:Aug 2007 Location:Tucson Arizona 4K collection:960 Blu-ray collection:5288 Blu-ray reviews:2 Trading Score:571	*sigh none of the 3 are any better than any of the others. ALL 3 of the codes (DTS-HD MA, Dolby TrueHD and PCM) are LOSSLESS (meaning 0 loss of the master audio. DTS-HD MA and TrueHD are basically the exact same thing as PCM just "zipped" per se. and DTS-HD MA is NOT any better or effective than TrueHD, DTS-HD MA is just recorded at a slightly higher volume. IF you have two audio tracks in lossless on the same disc level matching the two tracks and comparing, you'll find there is no diff. Louder DOES NOT equal better

07-01-2009, 07:14 AM	#7
Bruce Morrison Power Member Member since:Feb 2007 Location:United Kingdom 4K collection:339 Blu-ray collection:2242 DVD collection:581	I agree that all three will sound identical after volume equalisation. The only argument in favour of using the DD TrueHD and DTS HDMA codecs is that they require less space on a BD compared with the equivalent PCM track, thereby freeing up more disc space for the video which can therefore be encoded at a higher bitrate. I assume that's why the major studios tend to use one of the audio codecs rather than PCM. (Also, of course, they have probably made deals with Dolby and/or DTS.) But does anyone know the typical percentage savings in space that are gained by using DD TrueHD or DTS HDMA rather than PCM? In other words, if the PCM would require, say 5GB, what would each of the codecs typically require? I'd be interested to know how significant the saving is.

Best Blu-ray Movie Deals