asterisk users - Jan 2011 - Are the Siren7 and Siren14 the G.722 HD voice codecs?

Hi Everyone,

1- Are the Siren7 and Siren14 the G.722 HD voice codecs?
2- Are these codecs only for Polycom units or are they universal across all
other SIP phones that advertise the HD voice codec like Aastra?
3- What is the main difference between the two and is it advisable to run
these over the INTERnet (not INTRAnet)?

Thanks
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On 01/05/2011 03:29 PM, Bruce B wrote:
> Hi Everyone,
>
> 1- Are the Siren7 and Siren14 the G.722 HD voice codecs?
> 2- Are these codecs only for Polycom units or are they universal 
> across all other SIP phones that advertise the HD voice codec like Aastra?
> 3- What is the main difference between the two and is it advisable to 
> run these over the INTERnet (not INTRAnet)?
>
The G.722 codec in * is G.722. The Siren7 codec in * is probably not 
Siren 7, but G.722.1. G.722.1 is very similar to Siren7, but uses a 
different code in the SDP and has some minor differences in the codec. 
The name G.722.1 may look similar to G.722, but the codecs bear no 
relation to each other. The Siren14 codec in * is probably not Siren14, 
but G.722.1C. G.722.1C is very similar to Siren14, but like 
Siren7/G.722.1 the SDP code is different, and there are minor 
differences in the codec.

G.722.1 is a 7kHz bandwidth codec. G.722.1C is a stretched version 
offering 14kHz bandwidth. These are most often found in Polycom phones, 
but they are available elsewhere. The only widely supported HD codec is 
G.722. Pretty much anything offering wideband voice supports G.722.

Steve

On 01/05/2011 01:29 AM, Bruce B wrote:
> Hi Everyone,
You should really spend some time learning how to use a widely available 
search engine, such as Google or Bing. Many of the questions you ask 
here could be quickly answered that way.
>
> 1- Are the Siren7 and Siren14 the G.722 HD voice codecs?
That depends on what you mean by "the G.722 HD voice codecs". G.722
(no
suffix or annex) is a specific voice codec, and it is unrelated to 
Siren7 and Siren14. G.722.1 is the same thing as Siren7, and G.722.1 
Annex C is the same thing as Siren14. These are fairly well explained on 
the Wikipedia pages for G.722 and G.722.1.
> 2- Are these codecs only for Polycom units or are they universal across
> all other SIP phones that advertise the HD voice codec like Aastra?
There is no "the HD voice codec". The most widely available HD voice 
codec is G.722, but there are others available as well in endpoints from 
various manufacturers. G.722.1 and G.722.1C are available in many 
Polycom SIP devices, but not yet widely available in other devices 
(although there are softphones that have them), although they are 
available as binary add-on modules for Asterisk.
> 3- What is the main difference between the two and is it advisable to
> run these over the INTERnet (not INTRAnet)?
Which "two" are you referring to here?

G.722 is frequently used over the Internet (the weekly VUC makes it 
available, for example), and G.722.1/C use less network bandwidth than 
it does, so they should be usable in the same situations as well. 
Whether they are advisable for you to use or not depends entirely on 
your network connectivity, bandwidth and packet loss situation. None of 
them use more network bandwidth than G.711, though, so if your network 
connections can already handle G.711 calls without causing unacceptable 
audio disturbance, you should be fine using any of these codecs as well.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
skype: kpfleming | jabber: kfleming at digium.com
Check us out at www.digium.com & www.asterisk.org

On Wednesday 05 January 2011 07:07:10 Steve Underwood
wrote:
> On 01/05/2011 03:29 PM, Bruce B wrote:
> > Hi Everyone,
> > 
> > 1- Are the Siren7 and Siren14 the G.722 HD voice codecs?
> > 2- Are these codecs only for Polycom units or are they universal
> > across all other SIP phones that advertise the HD voice codec like
> > Aastra? 3- What is the main difference between the two and is it
> > advisable to run these over the INTERnet (not INTRAnet)?
> 
> The G.722 codec in * is G.722. The Siren7 codec in * is probably not
> Siren 7, but G.722.1. G.722.1 is very similar to Siren7, but uses a
> different code in the SDP and has some minor differences in the codec.
> The name G.722.1 may look similar to G.722, but the codecs bear no
> relation to each other. The Siren14 codec in * is probably not Siren14,
> but G.722.1C. G.722.1C is very similar to Siren14, but like
> Siren7/G.722.1 the SDP code is different, and there are minor
> differences in the codec.
The Siren7 and Siren14 codecs in Asterisk are licensed code from Polycom,
so they are indeed the Siren7 and Siren14 codecs.  They will interoperate
with any other vendor who has licensed those codecs from Polycom.

-- 
Tilghman

On 01/06/2011 01:04 AM, Tilghman Lesher wrote:
> On Wednesday 05 January 2011 07:07:10 Steve Underwood wrote:
>> On 01/05/2011 03:29 PM, Bruce B wrote:
>>> Hi Everyone,
>>>
>>> 1- Are the Siren7 and Siren14 the G.722 HD voice codecs?
>>> 2- Are these codecs only for Polycom units or are they universal
>>> across all other SIP phones that advertise the HD voice codec like
>>> Aastra? 3- What is the main difference between the two and is it
>>> advisable to run these over the INTERnet (not INTRAnet)?
>> The G.722 codec in * is G.722. The Siren7 codec in * is probably not
>> Siren 7, but G.722.1. G.722.1 is very similar to Siren7, but uses a
>> different code in the SDP and has some minor differences in the codec.
>> The name G.722.1 may look similar to G.722, but the codecs bear no
>> relation to each other. The Siren14 codec in * is probably not Siren14,
>> but G.722.1C. G.722.1C is very similar to Siren14, but like
>> Siren7/G.722.1 the SDP code is different, and there are minor
>> differences in the codec.
> The Siren7 and Siren14 codecs in Asterisk are licensed code from Polycom,
> so they are indeed the Siren7 and Siren14 codecs.  They will interoperate
> with any other vendor who has licensed those codecs from Polycom.
What Polycom licence to everyone is actually G.722.1 and G.722.1C. Been 
there. Done that.

Steve

We should also be very clear that the Siren codecs are supported on the
Polycom SoundStation conference phones and the VVX-1500 Business Media
Phones. These codecs are not supported in the SoundPoint desk phones.
The SoundPoint series support the more basic G.722 codec in the
IP335/450/550/560/650/670 models.

Michael Graves
mgraves  mstvp.com
o(713) 861-4005
c(713) 201-1262
sip:mjgraves at mstvp.onsip.com
skype mjgraves
> -------- Original Message --------
> Subject: Re: [asterisk-users] Are the Siren7 and Siren14 the G.722 HD
> voice codecs?
> From: Steve Underwood <steveu at coppice.org>
> Date: Wed, January 05, 2011 6:09 pm
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> <asterisk-users at lists.digium.com>
> 
> 
> On 01/06/2011 12:05 AM, Kevin P. Fleming wrote:
> > On 01/05/2011 07:07 AM, Steve Underwood wrote:
> >> On 01/05/2011 03:29 PM, Bruce B wrote:
> >>> Hi Everyone,
> >>>
> >>> 1- Are the Siren7 and Siren14 the G.722 HD voice codecs?
> >>> 2- Are these codecs only for Polycom units or are they
universal
> >>> across all other SIP phones that advertise the HD voice codec
like
> >>> Aastra?
> >>> 3- What is the main difference between the two and is it
advisable to
> >>> run these over the INTERnet (not INTRAnet)?
> >>>
> >> The G.722 codec in * is G.722. The Siren7 codec in * is probably
not
> >> Siren 7, but G.722.1. G.722.1 is very similar to Siren7, but uses
a
> >> different code in the SDP and has some minor differences in the
codec.
> >> The name G.722.1 may look similar to G.722, but the codecs bear no
> >> relation to each other. The Siren14 codec in * is probably not
Siren14,
> >> but G.722.1C. G.722.1C is very similar to Siren14, but like
> >> Siren7/G.722.1 the SDP code is different, and there are minor
> >> differences in the codec.
> >
> > Asterisk actually supports both the Siren* and G.722.1* names in SDP 
> > negotiations. I wasn't aware there were bitstream
incompatibilities
> > between the Siren* and G.722.1* variants, even though the code may be 
> > slightly different... so Asterisk uses a single codec module for both 
> > variants.
> >
> I am unclear how compatible or incompatible the bitstreams may be. What 
> I know (from implementing these codecs) is that the source code Polycom 
> provide licencees, as the basis for developing their own G.722.1 and 
> G.722.1C codecs, has several comments referring to things not being 
> quite the same as Siren7/Siren14. However, they don't hand out the 
> actual Siren7/Siren14 source code, so I don't know how much divergence 
> there is.
> 
> Steve
> 
> 
> --
> _____________________________________________________________________
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Actually, all of the conference phones are known by the "SoundStation"
name and the desk phones are "SoundPoint."


Michael Graves
mgraves  mstvp.com
o(713) 861-4005
c(713) 201-1262
sip:mjgraves at mstvp.onsip.com
skype mjgraves
> -------- Original Message --------
> Subject: Re: [asterisk-users] Are the Siren7 and Siren14 the G.722 HD
> voice codecs?
> From: Steve Underwood <steveu at coppice.org>
> Date: Sat, January 08, 2011 11:16 am
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> <asterisk-users at lists.digium.com>
> 
> 
> On 01/08/2011 03:44 AM, Kevin P. Fleming wrote:
> > On 01/06/2011 11:34 AM, mgraves at mstvp.com wrote:
> >> We should also be very clear that the Siren codecs are supported
on the
> >> Polycom SoundStation conference phones and the VVX-1500 Business
Media
> >> Phones. These codecs are not supported in the SoundPoint desk
phones.
> >> The SoundPoint series support the more basic G.722 codec in the
> >> IP335/450/550/560/650/670 models.
> >
> > The SoundPoint IP6000 and IP7000 conference phones (and maybe the 
> > IP5000, I haven't checked) also support G.722.1 and G.722.1C.
> >
> The IP6000 is actually model Polycom recommended for testing when we 
> implemented G.722.1.
> 
> One of the annoying things about the Polycoms is trying to work out what 
> they can do. You have to search quite hard to find which codecs each 
> model supports.
> 
> Steve
> 
> 
> --
> _____________________________________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
> New to Asterisk? Join us for a live introductory webinar every Thurs:
>                http://www.asterisk.org/hello
> 
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users

On 01/09/2011 08:23 AM, mgraves at mstvp.com wrote:
> Actually, all of the conference phones are known by the
"SoundStation"
> name and the desk phones are "SoundPoint."
Sure enough... thanks for the clarification!

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
skype: kpfleming | jabber: kfleming at digium.com
Check us out at www.digium.com & www.asterisk.org