Displaying 14 results from an estimated 14 matches for "mcra".
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mca
2005 Feb 21
2
speex denoiser adaptation time
Hi Jean Marc & List,
So I have been fiddling with the denoiser (again). While poking
around I noticed that nb_preprocess is basically a counter that
is mod-ded with 100 (the default), which causes Smin[] to be re-
seeded with the value in Stmp[] (min of the previous adaptation
period). Smin[] is then used to update the noise probability, which
is (probably) less likely when adaptation
2005 Feb 21
0
speex denoiser adaptation time
...time itself, but rather the window over which to look for
minima. The main idea is this: if the power in a certain bin isn't too
much higher than the minimal value for a certain window, then we can
adapt the noise estimate. The algorithm name is "Minima Controlled
Recursive Average" (MCRA) and it's from Cohen.
As for the arbitrary 3 frames before resuming adaptation, it's simply a
a matter of being on the safe side. It doesn't cost much to not adapt
when we're not sure, but a mistake is costly. In general, I would say
that the VAD-based adaptation is almost useless...
2010 Jun 04
1
Denoise causing drain pipe effect in audio
...t I have some
> knowledge in the area of noise suppression.
>
> In general, if you have information about the nature of the noise you
> are trying to suppress, you can do much better than just assuming white
> noise.
Nobody assumes white noise. The Speex noise suppressor applies an
MCRA-like algorithm to estimate the noise and then it has a spectral
amplitude estimator (similar to Wiener, but with a better criterion than
MSE).
Jean-Marc
2015 Mar 20
1
fast doveadm search results
On 20 Mar 2015, at 10:37, Vu Ngoc VU <vvu at mcra.fr> wrote:
>
> But to answer your questions, I'm not really interested in purging the cache data.
> I just think that cache has expiration delay.
> The only point is to get this "doveadm search" answering me in minutes instead of hours.
> Writing my original post, I...
2015 Mar 20
0
fast doveadm search results
Vu Ngoc VU <vvu at mcra.fr> writes:
> My goal is to be able to find mails quickly with "doveadm search".
> We are using dovecot in a corporate. And some managers, sometimes ask to delete some messages.
> These messages are "unwanted" ones: mistakenly sent, defamatory...
>
> So, that...
2004 Sep 27
2
Speex VAD algorithm
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<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7226.0">
<TITLE>Speex VAD algorithm</TITLE>
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<BODY>
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2015 Mar 19
2
fast doveadm search results
hello,
I've posted same question here months ago.
But obtaine no answer, even not a "you question is stupid".
So I don't know what to think about that.
My goal is to be able to find mails quickly with "doveadm search".
We are using dovecot in a corporate. And some managers, sometimes ask to delete some messages.
These messages are "unwanted" ones: mistakenly
2005 Oct 25
1
audio preprocess questions
Jean Marc,
I have been fiddling around with preprocess to try to get it sounding
less metallic/underwater- so based on some things said recently,
I have been first fiddling with mean_post and mean_prior to try to
get them to do change the update rate, so that update_noise gets
called at the right times.
Haven't made it too deep into the code, but I have a few
questions in speex_preprocess:
2010 Jun 04
2
Denoise causing drain pipe effect in audio
Hi Jean
Thanks for the reply.
We expect to use the codec in an environment where we expect very high
background noise where high noise suppression will be needed. In a
situation like a soccer match.
Is there a way of retaining high noise suppression and still getting
better audio quality. Your pointers will be of great help.
Thanks,
Gurinder
On 6/4/10, Jean-Marc Valin <jean-marc.valin at
2015 Mar 20
2
fast doveadm search results
Steffen Kaiser writes:
> e.g. put message-id into mail_always_cache_fields
>
> - From http://dovecot.org/pipermail/dovecot-cvs/2013-May/023261.html
>
> lib-storage: Allow mail_*cache_fields settings to specify any hdr.* fields
... but I belatedly wrote ...
> Maybe you can even add these items into the cache upon delivery,
> but someone more knowlegable than I would have to
2014 Dec 05
0
speed up doveadm search
Hello, I have recently migrated our mail accounts from old setup with courier-imapd to Dovecot 2.
I thought that I can search quicky messages in mailboxes with doveadm because of indexes.
Our users are asking (sometimes) to remove messages that they have sent wrongly. Some of them are coming from Exchange, and there is a feature in Outlook to recall (to delete) a message.
So basically, they
2015 Mar 20
0
fast doveadm search results
> Date: Fri, 20 Mar 2015 02:05:48
> From: Joseph Tam <jtam.home at gmail.com>
> To: dovecot at dovecot.org
> Subject: Re: fast doveadm search results
>
> Steffen Kaiser writes:
>
>> e.g. put message-id into mail_always_cache_fields
>>
>> - From http://dovecot.org/pipermail/dovecot-cvs/2013-May/023261.html
>>
>> lib-storage: Allow
2015 Aug 13
2
need help debugging deleted mails
hello,
one of our users complained about the fact that he doesn't receive some messages (randomly) that his teamates have.
Grepping for the message-ID in the mail.log, I can see lmtp says it is saved :
Aug 12 15:23:23 imap-01 dovecot: lmtp(4943, johndoe at example.net): fFuCO09Hy1VPEwAA2t/0+w: sieve: vsize= msgid=<037e01d0d502$0e3687d0$2aa39770$@example.net>: stored mail into mailbox
2015 Aug 13
4
need help debugging deleted mails
> Date: Thu, 13 Aug 2015 13:38:58
> From: Marcus R?ckert <darix at opensu.se>
> To: dovecot at dovecot.org
> Subject: Re: need help debugging deleted mails
>
> mail_log plugin might help
>
> darix
I've seen this plugin, but I fear that it will be enabled for all users.
I don't have seen an way to enable it only for 1 user like rawlog permits.
Maybe,