IPB

Welcome Guest ( Log In | Register )

New Standard: USAC, sussesor of (HE)-AAC
IgorC
post Sep 16 2011, 06:09
Post #1





Group: Members
Posts: 1577
Joined: 3-January 05
From: ARG/RUS
Member No.: 18803



It's a new standard (Unified Speech and Audio Coding USAC, aka MPEG-D part 3).
It has reached a status of Final Draft International Standard.

Basic information http://en.wikipedia.org/wiki/Unified_Speech_and_Audio_Coding
There are some papers about new compression schemes in internet.

There was a verification test where USAC was compared to HE-AAC v1/v2 on range of bitrates 8-96 kbps. http://mpeg.chiariglione.org/meetings/tori...orino_press.htm
The report should be available in September October.

Some anonymous source has indicated that USAC was clearly superior to HE-AAC and it did very good on speech though something like "USAC at 48 kpbs = HE-AAC at 64 kbps" shouldn't be expected. It's more like 20-25% of bitrate gain at 20-32 kbps and 10-12% at 64 kbps. That's still pretty good.

There is no information if USAC will be used at higher bitrates as ( LC-AAC's area). The core coder of USAC includes a new enhanced SBR (eSBR).
Both SBR and new eSBR have no advantage over LC-AAC at bitrates higher than 80 kbps. Its unclear if eSBR can be disabled at higher bitrates.


It will be interesting to hear opinions and if somebody knows something more about it.
Go to the top of the page
+Quote Post
 
Start new topic
Replies
polemon
post Oct 13 2011, 15:34
Post #2





Group: Members
Posts: 144
Joined: 1-April 09
Member No.: 68578



For me, as a Linux user, developer of embedded systems and free software advocate, I look at it with a certain skepticism.

While the technology is exciting and interesting, it will leave out the users from becoming developers and/or contributors. USAC might very well linger around like AAC does for the most part. It is out of question, that USAC will be heavily patented. There are some encoders out there, that produce great results when encoding AAC, but most of them aren't free. As I understand it, due to patents, it is quite dificult to use AAC in embedded devices. That's one of the reasons, why most car navigation systems use Ogg/Speex for speech, etc.
I recon, apart from some niche applications, USAC will remain obscured, just like AAC for the average user. As for developers, they will turn to whatever is best, free and available. Once reason more to use Xiph things, as many game developers do as well.


--------------------
-EOF-
Go to the top of the page
+Quote Post
C.R.Helmrich
post Oct 13 2011, 20:40
Post #3





Group: Developer
Posts: 690
Joined: 6-December 08
From: Erlangen Germany
Member No.: 64012



QUOTE (polemon @ Oct 13 2011, 16:34) *
I recon, apart from some niche applications, USAC will remain obscured, just like AAC for the average user.

Well, (HE-)AAC is used in DAB+, DRM, DMB, Youtube, iTunes Store, H.264 video from mobile devices, and some more. Whether these are niche applications is debatable, I'd say.

Think of it this way: years or R&D and over a million Euros/Dollars went into the standardization of AAC and now USAC. I wouldn't understand why one should give away the use of such highly specialized, sophisticated technology for free.

QUOTE
sooner or later all kinds of multimedia material will be detached from the physical media. Once that is the case, it only makes sense to use the best encoders available.

Both absolutely true. But the media creators (music distributors, digital camera manufacturers, etc.) already nowadays license the AAC encoders, so it seems they are willing to pay for the technology. Of course it's a different thing if you create your own media content, e.g. edit home videos or your band's music. Isn't there any commercial software like Adobe Premiere for Linux with in-the-box state-of-the art encoders?

Chris

This post has been edited by C.R.Helmrich: Oct 13 2011, 20:42


--------------------
If I don't reply to your reply, it means I agree with you.
Go to the top of the page
+Quote Post
Speckmade
post Jul 12 2012, 21:11
Post #4





Group: Members
Posts: 36
Joined: 15-February 05
Member No.: 19848



QUOTE (C.R.Helmrich @ Oct 13 2011, 21:40) *
Think of it this way: years or R&D and over a million Euros/Dollars went into the standardization of AAC and now USAC. I wouldn't understand why one should give away the use of such highly specialized, sophisticated technology for free.

Because the profit for society and progress in general would be much bigger. It's kinda logical for people with a common need to get together, form a community and to have people from that community trying to satisfy the needs of the community. If you feel you're part of such a community you may want to serve them without a long-term plan on exploiting it. - Cooperation, you know; the internet wouldn't exist without that kind of thinking.

- I hope these four sentences can give you a first idea...
Go to the top of the page
+Quote Post
Garf
post Jul 12 2012, 22:16
Post #5


Server Admin


Group: Admin
Posts: 4886
Joined: 24-September 01
Member No.: 13



QUOTE (Speckmade @ Jul 12 2012, 22:11) *
Because the profit for society and progress in general would be much bigger. It's kinda logical for people with a common need to get together, form a community and to have people from that community trying to satisfy the needs of the community. If you feel you're part of such a community you may want to serve them without a long-term plan on exploiting it. - Cooperation, you know; the internet wouldn't exist without that kind of thinking.

- I hope these four sentences can give you a first idea...


The commercial/corporate community that needed a unified speech and audio codec did exactly what you described, and due to how MPEG license pooling works (IIRC), use of this codec will even be free for them.

Everyone else that was not involved in the development will have to pay for it. This means you.

Basically, your argument doesn't do anything to answer the question you were replying to.
Go to the top of the page
+Quote Post

Posts in this topic
- IgorC   New Standard: USAC   Sep 16 2011, 06:09
- - IgorC   USAC verification test report   Oct 12 2011, 19:57
- - C.R.Helmrich   Thanks for posting that link, Igor! I've a...   Oct 12 2011, 21:49
|- - IgorC   QUOTE (C.R.Helmrich @ Oct 12 2011, 17:49)...   Oct 13 2011, 02:53
- - FreaqyFrequency   Cool stuff! Always exciting to see the prospe...   Oct 13 2011, 01:53
|- - Speckmade   QUOTE (FreaqyFrequency @ Oct 13 2011, 02...   Jul 12 2012, 18:52
|- - Canar   QUOTE (Speckmade @ Jul 12 2012, 10:52) On...   Jul 12 2012, 19:00
- - polemon   For me, as a Linux user, developer of embedded sys...   Oct 13 2011, 15:34
|- - C.R.Helmrich   QUOTE (polemon @ Oct 13 2011, 16:34) I re...   Oct 13 2011, 20:40
|- - polemon   QUOTE (C.R.Helmrich) Well, (HE-)AAC is used in DAB...   Oct 13 2011, 22:23
||- - C.R.Helmrich   QUOTE (polemon @ Oct 13 2011, 23:23) The ...   Oct 14 2011, 20:35
||- - Garf   QUOTE (C.R.Helmrich @ Oct 14 2011, 21:35)...   Oct 15 2011, 15:15
|- - Garf   QUOTE (C.R.Helmrich @ Oct 13 2011, 21:40)...   Oct 14 2011, 07:04
|- - Speckmade   QUOTE (C.R.Helmrich @ Oct 13 2011, 21:40)...   Jul 12 2012, 21:11
|- - Garf   QUOTE (Speckmade @ Jul 12 2012, 22:11) Be...   Jul 12 2012, 22:16
- - FreaqyFrequency   @polemon, you're familiar with Opus, I assume?...   Oct 13 2011, 16:00
|- - polemon   Well, I don't want to be an evangelist of any ...   Oct 13 2011, 18:32
|- - IgorC   QUOTE (FreaqyFrequency @ Oct 13 2011, 12...   Oct 13 2011, 22:35
- - smok3   polemon, interesting, but if you wanna do it ...   Oct 13 2011, 19:35
- - hlloyge   Problem with Linux isn't finding encoders for ...   Oct 13 2011, 20:58
|- - C.R.Helmrich   Well, USAC is just that: a general purpose codec. ...   Oct 13 2011, 21:25
- - IgorC   Nice, It will be great to see an implementation ...   Oct 13 2011, 21:30
|- - ksuman   QUOTE (IgorC @ Oct 13 2011, 21:30) Nice, ...   May 16 2012, 06:26
- - smok3   QUOTE your Linux distributor of choice licenses a ...   Oct 14 2011, 20:51
|- - Garf   QUOTE (smok3 @ Oct 14 2011, 21:51) - to p...   Oct 15 2011, 15:22
- - smok3   i meant paying (or just allowing closed binaries) ...   Oct 15 2011, 19:58
- - IgorC   Reference software http://www.itscj.ipsj.or.jp/sc2...   Jun 3 2012, 17:55
|- - Garf   QUOTE (IgorC @ Jun 3 2012, 18:55) Referen...   Aug 3 2012, 16:07
|- - C.R.Helmrich   QUOTE (Garf @ Aug 3 2012, 17:07) In true ...   Aug 3 2012, 16:36
|- - Garf   QUOTE (C.R.Helmrich @ Aug 3 2012, 17:36) ...   Aug 3 2012, 17:04
|- - IgorC   QUOTE (C.R.Helmrich @ Aug 3 2012, 12:36) ...   Aug 3 2012, 17:30
- - pdq   I think you will find that no matter how many time...   Jul 12 2012, 19:13
- - benski   One thing that's curious about USAC. Much of ...   Jul 12 2012, 20:29
- - IgorC   Maybe it's this particular encoder. Because ...   Aug 3 2012, 17:02
|- - C.R.Helmrich   QUOTE (IgorC @ Aug 3 2012, 18:02) Because...   Aug 3 2012, 20:08
- - darkbyte   Is there any encoder/decoder available in binary f...   Oct 17 2013, 22:02


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 21st October 2014 - 19:18