#55 G722 codec

[Anonymous]

Originally created by: zdevel
Originally owned by: r3gis...@gmail.com

G722 (HD codec) is awesome thing to use, bitrate is around 64kbps - so it rovides really high-quality sound.
This codec also absolutely free.
(Very rare codec among VoIP providers, by the way, but great thing to deploy on office PBX)

[Anonymous]

Originally posted by: r3gis...@gmail.com

G722 8Khz is already available :

You can change the priority of the codecs in Settings>Media > Codecs.
On latests unofficial builds I use a drag and drop list to set the priority. On latest version from the market you have to enter priority integers by hand to change codecs priorities.

[Anonymous]

Originally posted by: chatwi...@gmail.com

lol 8khz is not 64

[Anonymous]

Originally posted by: r3gis...@gmail.com

Yes but KHz is different of Kbits !!!

:)

KHz is the unity for audio frequency, Kbits for data bitrate.

You can transmit something audio encoded at 8KHz or 16KHz using a large bandwidth : 64kbps for example. Have to be checked, but I think that the g722 codec adapts its bandwidth.
But your point is interesting, since g722 should encodes 16khz audio and not 8Khz. I'll check this particular point.
Btw, for codecs, I will not add extra code in pjsip (at least that's not planned right now).
You can consult all the codecs and their features here :
http://www.pjsip.org/sip_media_features.htm#media
The only thing I will do is activate/deactivate these codecs.
Besides some codecs implementations are licensed and some uses of codecs are also licensed.
Licenses are one big unsolved point for me and that's the reason why some codecs (such as g729 or g722.1 for example) are not yet enabled.
Other codecs such as ilbc are disabled because not really pertinent for mobiles. But it will be discussed and there is solutions in my mind to provide a way for user to download an alternate version of the sip stack with more codecs activated.

[Anonymous]

Originally posted by: r3gis...@gmail.com

Well pjsip has fixed the 8kHz to a 16kHz right now.
Should be fine with the existing g722 codec (at least version -12-27 - I think it was already fixed some version before but...)

Owner: r3gis.3R
Status: NextRelease

[Anonymous]

Originally posted by: fcak...@gmail.com

For historical purposes G722  sampling rate  is declared as 8 Khz. But in reality  it is 16kHz  with  maximum frequency  7 Khz.

So what is the difference between  G.722-WB and NB?    Is there such as thing  as G.722-WB   standard?  G.722 or (G.722-NB) is already HD.   This is sooooooo confusing and misleading.