[Speex-dev] noise reduction capabilities

Jean-Marc Valin jean-marc.valin at usherbrooke.ca
Tue Oct 30 05:05:55 PDT 2007

Hi Richard,

Richard McGravie a écrit :
> We are looking for a consultant to assistance in the following areas.
> 1. Shim in the pre filter from speex to all trunk interfaces in
> asterisk. (E1, ISDN and FXO)
> 2. Optimize and improve the pre-filter for airplane noise floor.
> Is this something you would be willing to assist us with or do you have
> any contacts that could assist in this regard?

I'm not qualified to do 1), but I can do 2). When you say optimise, do
you have a specific platform in mind? Also, any precise time frame?

> Travel to Ottawa might be needed as well as the opportunity to travel on
> a vip business jet during testing and be a rock star for a day :)

That part could be a bit more complicated. Unlike what my email address
implies, I currently live in Sydney, Australia. Fortunately, I believe
most of the work can be done from recordings.



> Regards,
> Richard
> Richard McGravie
> Bulletendpoints Enterprises Inc
> (514)-952-0890
> www.Bulletendpoints.com
> Quoting Jean-Marc Valin <jean-marc.valin at usherbrooke.ca>:
>> Richard McGravie a écrit :
>>> Hi,
>>> I am considering to use Speex in a particular environment and I want
>>> to ask if
>>> you thought it realistic.
>>> I am going to use Wireless SIP (G.711) handsets in an environment
>>> that is
>>> typcially noisey (background), connecting to an Asterisk PBX. I am
>>> considering
>>> converting the G.711 to Speex so I can "massage" out the background
>>> noise. Is
>>> this realistic?
>> Note that the noise suppression algorithm is independent of the codec,
>> so it can be used on any codec. I suggest you try it on your samples and
>> see for yourself (see the --denoise option of speexenc or the
>> testdenoise program).
>>     Jean-Marc

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