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

Herve Taddei <herve.taddei@huawei.com> Mon, 11 January 2010 16:03 UTC

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Date: Mon, 11 Jan 2010 17:03:24 +0100
From: Herve Taddei <herve.taddei@huawei.com>
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To: 'Steve Underwood' <steveu@coppice.org>, codec@ietf.org
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Subject: Re: [codec] WG Review: Internet Wideband Audio Codec (codec)
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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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