Re: [codec] WG Review: Internet Wideband Audio Codec (codec)

I confirm that Telcos (Orange, DT, BT..) have alreay widely deployed G.722 for wideband voice telephony over IP
For Orange, it is now used from 2006 with now between 500k and 1M customers using wideband phones implementing G.722 (and probably even more customers than 1M for BT).
The feedback from Orange's customers about the overall VoIP quality provided by their wideband "G.722" DECT phones connected to their Home GWs is excellent, both when compared with other VoIP wideband voice services using other codecs and of course when compared with Narrow Band quality.
This enhanced quality is much more than a codec only issue ! It is strongly influenced by many other factors and especially by terminal acoustic performance.
Besides this quality is obtained with terminals at attractive prices thanks to G.722 RF status and low complexity
The huge amount of time, effort and costs to deploy a new codec to gain 0.3 or 0.5 MOS in "formal" codec subjective tests would have no sense from the overall service quality and business perspective. It would, on the other round, raise new interoperability problems with all this G.722 based legacy environment with additional transcoding costs in networks and a degraded end to end transcoded quality between all wideband VoIP users

Stéphane

-----Message d'origine-----
De : codec-bounces@ietf.org [mailto:codec-bounces@ietf.org] De la part de Herve Taddei
Envoyé : lundi 11 janvier 2010 17:03
À : 'Steve Underwood'; codec@ietf.org
Objet : Re: [codec] WG Review: Internet Wideband Audio Codec (codec)

There are some basic G.722 PLCs that are not the ones from Broadcom and FT that were developed during the PLC standardization to serve as anchors. They should be included in the next version of the ITU-T Software Tool Library.
On those PLCs let's rather say that I have not seen any patent declarations.
For such simple tools to my best knowledge (and I can not be sure at 100%) there should be RF.  

BTW, it is not because it is old that it is not of interest. Different industry organizations are deploying G.722 (e.g. ETSI TC DECT, Home Gateway
Initiative) and we all know that G.711 is widely deployed.

For G.722, the time it needed to get deployed is certainly linked to the cost and the technical challenge needed to make a Wideband terminal.

Hervé

-----Original Message-----
From: codec-bounces@ietf.org [mailto:codec-bounces@ietf.org] On Behalf Of Steve Underwood
Sent: Monday, January 11, 2010 4:24 PM
To: codec@ietf.org
Subject: Re: [codec] WG Review: Internet Wideband Audio Codec (codec)

On 01/11/2010 11:00 PM, Christian Hoene wrote:
> Dear Herve Taddei,
>
>    
>> Besides, I don't think you would have any trouble to propose at ITU-T
some
>> new appendices to G.711 and G.722 that could fit your goals. An 
>> appendix
is
>> non normative (a bit like the informative reference to G.711 PLC in
iLBC).
>> By the way, if I am not wrong, some basic ITU-T G.722 PLCs are RF.
>>      
> This was my understanding, too.
>    
The G.722 spec is 23 years old, so it would be difficult for any of the patents on that spec to still be valid. The ITU patent database does list US patent 5528629 as related to G.722, but I assume this is an error. The patent dates from so long after G.722 came out, and its contents do not appear relevant to G.722. However, the recent additions for PLC are:

     G.722 (1988) App IV - Broadcom has claims
     G.722 Appendix III - Broadcom has claims
     G.722 Appendix IV - France Telecom has claims.

Have you seen any clear statements that those patents may be used royalty free?

Steve

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