SILK speech codec, Celt, FreeSWITCH
I just read a blog post about this. http://tools.ietf.org/html/draft-vos-silk-00 My main questions about it would be 1. whether it will be licenced in such a way as to permit free software/open-source implementation in FreeSWITCH. I suppose this partly depends on IETF's patent policy. 2. How it compares with Celt, which doesn't give rise to any known patent issues and is available for FreeSWITCH today. for other FreeSWITCH users who wish to experiment with Celt and listen to high-quality wide-band calls, it should be noted that Celt is still under development and backward-incompatible changes have occurred in the past. Making sure that both endpoints are using the same version of Celt solves this, otherwise the audible results can be rather unpleasant.
SILK will NEVER take off if they don't stop jerking developers around. I have a silk binary but its 32bit only... You CAN NOT link a 32bit .a file into a 64bit .so just won't work. And I emailed about this fact and I got brushed off .. it takes only a few seconds to compile a 64bit version yet they seem to not be interested. CELT will win this battle. Its Open it works NOW. /b On Sep 28, 2009, at 7:25 PM, Jason White wrote:
I just read a blog post about this.
http://tools.ietf.org/html/draft-vos-silk-00
My main questions about it would be
1. whether it will be licenced in such a way as to permit free software/open-source implementation in FreeSWITCH. I suppose this partly depends on IETF's patent policy.
2. How it compares with Celt, which doesn't give rise to any known patent issues and is available for FreeSWITCH today.
for other FreeSWITCH users who wish to experiment with Celt and listen to high-quality wide-band calls, it should be noted that Celt is still under development and backward-incompatible changes have occurred in the past. Making sure that both endpoints are using the same version of Celt solves this, otherwise the audible results can be rather unpleasant.
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Brian West <brian@freeswitch.org> wrote:
SILK will NEVER take off if they don't stop jerking developers around. I have a silk binary but its 32bit only... You CAN NOT link a 32bit .a file into a 64bit .so just won't work. And I emailed about this fact and I got brushed off .. it takes only a few seconds to compile a 64bit version yet they seem to not be interested.
The submission to the IETF changes this situation in that, subject to patent issues, someone could write their own implementation.
CELT will win this battle. Its Open it works NOW.
I hope Celt succeeds; I like its audio quality.
On 09/29/2009 09:05 AM, Jason White wrote:
Brian West<brian@freeswitch.org> wrote:
SILK will NEVER take off if they don't stop jerking developers around. I have a silk binary but its 32bit only... You CAN NOT link a 32bit .a file into a 64bit .so just won't work. And I emailed about this fact and I got brushed off .. it takes only a few seconds to compile a 64bit version yet they seem to not be interested.
The submission to the IETF changes this situation in that, subject to patent issues, someone could write their own implementation.
CELT will win this battle. Its Open it works NOW.
I hope Celt succeeds; I like its audio quality.
Its early days for the IETF work, but its possible SILK and CELT might merge into one codec. The authors are certainly on amicable terms right now. The snag with IETF stuff is it moves like molasses, so its hard to say whether anything will happen on a sane timescale. Steve
I'm not one that usually likes to sit around waiting on stuff... but I waited on SILK and was let down. /b On Sep 28, 2009, at 8:22 PM, Steve Underwood wrote:
Its early days for the IETF work, but its possible SILK and CELT might merge into one codec. The authors are certainly on amicable terms right now. The snag with IETF stuff is it moves like molasses, so its hard to say whether anything will happen on a sane timescale.
Steve
On 09/29/2009 09:31 AM, Brian West wrote:
I'm not one that usually likes to sit around waiting on stuff... but I waited on SILK and was let down.
/b
On Sep 28, 2009, at 8:22 PM, Steve Underwood wrote:
Its early days for the IETF work, but its possible SILK and CELT might merge into one codec. The authors are certainly on amicable terms right now. The snag with IETF stuff is it moves like molasses, so its hard to say whether anything will happen on a sane timescale.
Steve
Well, if they aim to keep to their original plan, ahead of anything interesting the IETF might do, they are starting to look a little tardy.
Steve
Doesn't SILK scale down on bandwidth much lower than CELT can? -Michael -----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Jason White Sent: Monday, September 28, 2009 6:26 PM To: FreeSWITCH-users Subject: [Freeswitch-users] SILK speech codec, Celt, FreeSWITCH I just read a blog post about this. http://tools.ietf.org/html/draft-vos-silk-00 My main questions about it would be 1. whether it will be licenced in such a way as to permit free software/open-source implementation in FreeSWITCH. I suppose this partly depends on IETF's patent policy. 2. How it compares with Celt, which doesn't give rise to any known patent issues and is available for FreeSWITCH today. for other FreeSWITCH users who wish to experiment with Celt and listen to high-quality wide-band calls, it should be noted that Celt is still under development and backward-incompatible changes have occurred in the past. Making sure that both endpoints are using the same version of Celt solves this, otherwise the audible results can be rather unpleasant. _______________________________________________ FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
participants (4)
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Brian West
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Jason White
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Michael Giagnocavo
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Steve Underwood