Stephan, I stand corrected. I'm not political, but I definitely do lean toward open source where possible.
The only exposure I've had to EVS is to notice that it's been deployed by T-Mobile USA as a late stage part of their LTE rollout. In contrast, just about everything I use daily is Opus-capable. I do wish that Opus implementations were more interoperable. All the various modes do add complexity. Michael Graves [email protected] http://www.mgraves.org o(713) 861-4005 c(713) 201-1262 sip:[email protected] skype mjgraves -----Original Message----- From: Sursound <[email protected]> On Behalf Of Stefan Schreiber Sent: Friday, May 31, 2019 11:42 AM To: Surround Sound discussion group <[email protected]> Subject: Re: [Sursound] wifi audio (was Re: Deconstructing soundbar marketing B.S.) EVS is a full-range codec, covering both speech and music compression. Alas: the first link I gave includes tests involving both EVS and Opus. AMR is a clear speech codec; better to see (E)LD-AAC as forerunner of EVS. (Support included in many operating systems, including iOS and Android. https://www.iis.fraunhofer.de/en/ff/amm/communication/aaceld.html Just check compatibility lists?) I am not doing politics here, please respect this. But I think representations have to be balanced. You could not write a scientific article about LD audio compression leaving out several codecs which are in very wide use. The patent argument is not relevant in this context. (You were < now > introducing the patent argument in the sense that people “should” use opus. This is unrelated to the claim I was disputing. Alas, you simply can’t use opus in < every > context. ) Just to clarify a few things. Best, Stefan Schreiber P.S.: I am definitively positive about Opus, but the person who is doing “politics” doesn’t seem to be me. That “EVS is basically a revenue engine” is IMO a biased statement, because it has been chosen to be a 3GPP standard. (Most companies voting not receiving EVS revenues.) And yes, Opus seems to be patent-free. (Or say the SILK patents have been donated by Microsoft. So actually there are some patents, but there are no fees.) - - - - Citando mgraves mstvp.com <[email protected]>: > Perhaps "pinnacle" is a bit of an over statement, but the point is sound. > > EVS is quite capable, but note that that entire presentation makes no > mention of Opus at all. One arises from the 3GPP the other from the > IETF. Fundamentally different groups, with very different > perspectives. > > Like AMR before it, or MPEG, EVS is basically a revenue engine for the > various patent holders. > > Much of what EVS can do follows Opus, after-the-fact. The real > strength of EVS are the compatibility modes with legacy telecom codes > (AMR, AMR-WB, AMR-WB+) which virtually ensured adoption in mobile > telecom. > > Opus is open source and free to use by anyone. It also accommodates an > arbitrary number of channels, supporting various surround schemes. > > There are those who, fearing the appearance of some patent holder > making a claim against Opus, will prefer to pay for a license to use > something else. > > Michael Graves > > [email protected] > > http://www.mgraves.org > > o(713) 861-4005 > > c(713) 201-1262 > > sip:[email protected] > > skype mjgraves > > -----Original Message----- > > From: Sursound <[email protected]> On Behalf Of Stefan > Schreiber > > Sent: Friday, May 31, 2019 10:01 AM > > To: Surround Sound discussion group <[email protected]> > > Subject: Re: [Sursound] wifi audio (was Re: Deconstructing soundbar > marketing B.S.) > > (Opus) > >> It's basically the pinnacle of audio encoding at this point, having >> >> merged the best ideas from CELT, Silk and a few entirely new ones. >> >> It would be hard to see how any proprietary codec vendor could >> compete >> >> except where addressing a very narrow niche. > > - - > > Low delay AAC, in various versions? > > What about EVS? > > https://www.researchgate.net/profile/Anssi_Raemoe/publication/28260514 > 3/figure/fig6/AS:281480141651970@1444121503098/Combined-results-with-a > ll-72-listeners-and-all-signal-types-with-increasing-bitrate-in.png > > Opus is really good. But the “pinnacle”? > > http://www.aes.org/technical/documentDownloads.cfm?docID=548 > > “A narrow niche? “ 😉🍷 > > I would see EVS (more or less) as the low-delay version of USAC. > > Best, > > Stefan Schreiber > > - - - > > Citando mgraves mstvp.com <[email protected]>: > >> Chris, >> >> Actually, I too come from a broadcast background, having installed >> >> graphics systems into production and master controls for over 25 >> >> years. I completely appreciate the demand for hard real-time and zero >> >> latency. >> >> I've tracked Opus since its earliest days in the IETF CODEC working >> >> group. The standard has many operative modes. It's absolutely capable >> >> of full-bandwidth, in both lossy and lossless modes. >> >> You will find it both in the production/contribution side of the >> house >> >> (remote codecs, STL, etc.) and distribution. It also dominates video >> >> conference space. >> >> It's basically the pinnacle of audio encoding at this point, having >> >> merged the best ideas from CELT, Silk and a few entirely new ones. >> >> It would be hard to see how any proprietary codec vendor could >> compete >> >> except where addressing a very narrow niche. >> >> Michael Graves >> >> [email protected] >> >> http://www.mgraves.org >> >> o(713) 861-4005 >> >> c(713) 201-1262 >> >> sip:[email protected] >> >> skype mjgraves >> >> -----Original Message----- > > URL: > <https://mail.music.vt.edu/mailman/private/sursound/attachments/201905 > 31/f2e08f40/attachment.html> -------------- next part -------------- An HTML attachment was scrubbed... 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