Displaying 20 results from an estimated 9000 matches similar to: "No subject"
2011 Mar 07
2
Query on Speex Echo Cancellation Constraints
Hi,
2012 Mar 21
2
Echo cancellation with different sound card for speaker and microphone
I'm developing an application that have a video conference component.
For that I need echo cancellation, and is looking around for
algorithms/implementations of that, and the one in speex is an
alternative. In the documentation for speex I find the following
sentence however.
"Using a different soundcard to do the capture and plaback will *not*
work, regardless of what you may
2005 Nov 10
0
Re: aec
Thanks for taking a look. There was no motion;
however you are right about sampling from a different
card. The speaker is connected to the Sound Blaster
card, while the microphone is part of a USB webcam. I
don't think that this is likely to be too unusual a
configuration among users.
I can retry the test using a sound card microphone to
see if there is a difference. If it turns out that
2005 Nov 11
0
Re: aec
This is a very real problem though.. I've encountered many sound cards that
use different clocks for input and output (even on the same card!) Also, if
you open up a sound device on windows at 8kHz, the microphone is often
around 8100Hz, while the output is 8000Hz.. I'm not sure if there's a bug
somewhere in some of the OS resampling algorithms, but I've seen that on
many machines.
2005 Nov 11
0
Re: aec
I wasn't implying that anyone do anything about it, just that's it a real
problem. Unfortunately, most of the crappy sound cards are the ones that
ship with your typical PC, so it's just something that people should be
aware of.
The solution is pretty straightforward -- just resample the audio data in
real time using a reference clock.
-----Original Message-----
From: Jean-Marc
2011 Sep 10
0
Mutiple vertical reference lines with a dotplot
Dear R helpers
I would like to plot vertical reference lines for yearly averages the
variable being plotted. In this case there are three years 2002, 2009 and
2010 for a variable Resc_Gt.
I've attempted to get the 2002 mean plotting (2.27) using the 'abline'
command but no joy.
Ideally I would like to be able to compute and plot the means of the three
years automatically using a
2011 Sep 15
1
Colour code y-axis labels on a dot plot
Dear R helpers
I would like to be able to colour code the y-axis labels on a complex dot
plot by a variable known as company (of which there are only two). The code
is below and data attached.
Thanks
MarkM
library("lattice")
library(latticeExtra) # for mergedTrellisLegendGrob()
# set size of the window
windows(height=10, width=7,rescale=c("fixed"))
##read the data to a
2006 Oct 31
1
Stream Synchronization for Echo Cancellation
Do you know of anyone, especially in the free software world, who has
successfully tackled the problem of synchronizing real-time input and
output audio streams of different devices using Windows? I need to do a
good job of this so that Acoustic Echo Cancellation can work in my Video
Conferencing application. I need to be able to capture audio from a USB
webcam and play it out over the user's
2006 Dec 30
0
[809] trunk/wxsugar/lib/wx_sugar/layout.rb: Fix default sizers to arrange_vertically, add padding on specified sides
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head><meta http-equiv="content-type" content="text/html; charset=utf-8" /><style type="text/css"><!--
#msg dl { border: 1px #006 solid; background: #369; padding:
2005 Nov 11
2
Re: aec
Le vendredi 11 novembre 2005 ? 01:21 -0800, Duane Storey a ?crit :
> This is a very real problem though.. I've encountered many sound cards that
> use different clocks for input and output (even on the same card!) Also, if
> you open up a sound device on windows at 8kHz, the microphone is often
> around 8100Hz, while the output is 8000Hz.. I'm not sure if there's a bug
>
2005 Nov 11
4
Re: aec
To everyone on the list: do *NOT* attempt to do echo cancellation with
signals sampled using different clocks. This will *NOT* work. Just a
0.1% difference between the two sampling rates (it's sometimes worse
than that) means that the impulse response drifts by 8 samples every
second. There's just no way to efficiently track this. Or at least no
way that doesn't involve something 100x
2007 Jun 28
1
Webcam under wine
Hi,
I recently installed a webcam under Linux, and I'd like to use it with
wine. I'd like to test x-lite with this webcam, but I have no idea how
to make it see my webcam. I tried in winecfg, but it doesn't seem to
contain anything related to the webcam.
I searched on internet, but only found some doc about msn messenger.
Apparently, it's kind of a hack, not a way to make the
2020 Feb 19
0
Re: Poor write performance with golang binding
On Wed, Feb 19, 2020 at 03:00:11PM +0100, Csaba Henk wrote:
> Hi,
>
> I scribbled a simple guestfs based program called guestfs-xfer with
> following synopsis:
>
> Usage: guest-xfer [options] [op] [diskimage]
>
> op = [ls|cat|write]
>
> options:
> -d, --guestdevice DEV guest device
> --blocksize BS blocksize [default:
2009 Mar 02
3
TinnR & Philips Webcam
Hi All,
I have a Philips Webcam, model SPC110NC. I had to download a diver in order for the webcam to work with Skype from the philips support page (www.philips.com/support).
Now when I start up TinnR to use with R, it opens the webcam. If I manually start up R, Tinn R will no longer synch with it.
Also, when I install the webcam driver there doesn't appear to be anyway to modify the
2005 Dec 13
0
mdf -- better adaption of W?
> Err. Ok, as I got it, 'bin 0' has it's amplitude in W[0], bin 1 to N-1 has
> it's real part in W[i*2-1] and it's imag in W[i*2], and finally the
> nyquist amplitude is in W[N-1]
Not quite, it's packet "real, real, imag, real, imag, ...".
> I took this from how power_spectrum() computes, so I might be off :)
But power_spectrum() handles that
2005 Aug 23
0
[Asterisk-Dev] Severe ISDN signal distortion in CVS-HEAD with octoBRI
BUG/SYMPTOMS:
1.Under certain circumstances, octoBRI (and most likely quadBRI) ISDN
cards (Junghanns/CologneChip) severely distort certain ISDN payload.
2.Although these claims relate to the bristuff patch, the problem might
not be limited to bristuff and in fact be rather asterisk/zaptel/libpri
related.
3.Signal distortion is limited to the use of the CVS version of the
Bristuff patch for
2014 Nov 26
0
"Communications with UPS advice@localhost lost" when using an other USB device
On Nov 25, 2014, at 8:17 PM, Victor Porton <porton at narod.ru> wrote:
> Well, also below in dmesg:
>
> [ 190.249219] usb 3-1.3: usbfs: USBDEVFS_CONTROL failed cmd blazer_usb rqt 33 rq 9 len 8 ret -110
-110 is -ETIMEDOUT.
> 26.11.2014, 03:05, "Victor Porton" <porton at narod.ru>:
>> A fragment of dmesg output (here idVendor=0665, idProduct=5161 is the
2007 Jan 22
1
theora problems
Hi,
I've been trying to use libtheora-experimental (libtheoraenc and
libtheoradec) to encode a webcam feed in real-time, to be decoded
also in realtime by a second party via XXX-IP, with - unfortunately - not so
good results.
I'm using custom written functions to convert from RGB8 to YUV420 and back
and, although not much processor-efficient, they do
what they're supposed to
2010 Jan 13
3
Live webcam stream with Theora
Hey all,
I've setup a simple page that just displays a live webcam stream of me
at work, and it supposedly falls back onto Cortado if your browser
doesn't support the <video> tag. The URL is here:
http://media.basilgohar.com/stream/
There's been a lot of talk about live streaming and low bitrate
streams. Here is my command line (I've posted this before):
time ffmpeg -f
2009 Jan 16
0
No subject
1. a clause in iphone Developpers agreement that forbid applications runnin=
g in background,
2. lack of sip clients.
Now it seems skype is available on iphones.
Has someone tried it ?
Along new skype capabilities in Asterisk, could it be used to hook iphones =
to Asterisk for both inbound and outbound calls ?
Regards
--_000_EC80F07C30CE3E46B2AD6B4407BE086F0C2AAD0242cworksmailcwo_