Displaying 18 results from an estimated 18 matches for "jmile".
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2006 Dec 25
1
Integrating speex with VideoNet application: Constantbackground noise
...h a 8 bit sample, am I right to say that I will not have the "big/little endian" issue?
What has gone wrong???
Regards,
Carine
----- Original Message ----
From: Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>
To: Carine Liang <carineliang@yahoo.com.sg>
Cc: John Miles <jmiles@pop.net>; speex-dev@xiph.org
Sent: Monday, 25 December 2006 10:22:44 AM
Subject: Re: [Speex-dev] Integrating speex with VideoNet application: Constantbackground noise
Have you tried starting with sampleenc/sampledec instead of doing
everything from scratch. That and the manual should contain e...
2006 Dec 24
1
Integrating speex with VideoNet application: Constantbackground noise
...39;s side and play the voice. My application works fine without the codec but I need to achieve a lower data rate. Anyone has done that before?
Is there anyone who's deal with encoding and
decoding PCM samples in windows?
Please help.
Carine
----- Original Message ----
From: John Miles <jmiles@pop.net>
To: Carine Liang <carineliang@yahoo.com.sg>; speex-dev@xiph.org
Sent: Friday, 3 November 2006 12:32:43 AM
Subject: RE: [Speex-dev] Integrating speex with VideoNet application: Constantbackground noise
DIV {
MARGIN:0px;}
Yes,
it's necessary; Speex will encode signed 1...
2006 Dec 28
0
Integrating speex with VideoNet application: Constantbackground noise
...h, maybe not paying enough attention to the manual and the sample code?
Jean-Marc
>
> Regards, Carine
>
>
> ----- Original Message ---- From: Jean-Marc Valin
> <jean-marc.valin@usherbrooke.ca> To: Carine Liang
> <carineliang@yahoo.com.sg> Cc: John Miles <jmiles@pop.net>;
> speex-dev@xiph.org Sent: Monday, 25 December 2006 10:22:44 AM
> Subject: Re: [Speex-dev] Integrating speex with VideoNet application:
> Constantbackground noise
>
> Have you tried starting with sampleenc/sampledec instead of doing
> everything from scratch. That...
2006 Nov 05
2
Integrating speex with VideoNet application: Constantbackground noise
...he values of the original PCM samples. For cases when the PCM sample values are constant (because no one is speaking), the decoded values fluctuate too. These fluatuations are causing the background noise. Is my observation expected?
Thanks,
Carine
----- Original Message ----
From: John Miles <jmiles@pop.net>
To: Carine Liang <carineliang@yahoo.com.sg>; speex-dev@xiph.org
Sent: Monday, 6 November 2006 11:52:53 AM
Subject: RE: [Speex-dev] Integrating speex with VideoNet application: Constantbackground noise
DIV {
MARGIN:0px;}
It
could be a million different things, unfortunate...
2006 Nov 05
1
Integrating speex with VideoNet application: Constantbackground noise
...ged my array from char to short and I'm still getting the same constant background noise. I notice that when I talk into the mike, I will get a slightly louder noise, can't hear any clear speech... Any idea what's wrong?
Regards,
Carine
----- Original Message ----
From: John Miles <jmiles@pop.net>
To: Carine Liang <carineliang@yahoo.com.sg>; speex-dev@xiph.org
Sent: Friday, 3 November 2006 12:32:43 AM
Subject: RE: [Speex-dev] Integrating speex with VideoNet application: Constantbackground noise
DIV {
MARGIN:0px;}
Yes,
it's necessary; Speex will encode signed 1...
2006 Nov 02
1
Integrating speex with VideoNet application: Constantbackground noise
...for your reply.
Yes, my output device is in 8-bit mode, same as my input mode. I'm actually working in char (8 bit) arrays. Is it necessary to work in signed short integers only? I changed all the short arrays in the example to char.
Carine
----- Original Message ----
From: John Miles <jmiles@pop.net>
To: carineliang@yahoo.com.sg; speex-dev@xiph.org
Sent: Thursday, 2 November 2006 2:04:39 PM
Subject: RE: [Speex-dev] Integrating speex with VideoNet application: Constantbackground noise
DIV {
MARGIN:0px;}
At
first glance it looks like you are opening the output device in 8-bi...
2006 Jun 19
0
codec at very low bit rate (2 kbps)
I'm not sure, but I think that Microsoft have the license now.. anyone know if there is the source code to download? Or others codecs.. thank you very much
---------- Original Message ----------------------------------
From: "John Miles" <jmiles@pop.net>
Date: Mon, 19 Jun 2006 10:15:59 -0700
>Do a search on "Voxware MetaVoice". I'm not sure who licenses the
>underlying technology these days (it's not Voxware anymore), but they do
>have solutions that work in the 1200-2900 bps range.
>
>-- john
>
&...
2006 Nov 05
0
Integrating speex with VideoNet application: Constantbackground noise
...of the original PCM samples. For cases when the PCM sample values are
constant (because no one is speaking), the decoded values fluctuate too.
These fluatuations are causing the background noise. Is my observation
expected?
Thanks,
Carine
----- Original Message ----
From: John Miles <jmiles@pop.net>
To: Carine Liang <carineliang@yahoo.com.sg>; speex-dev@xiph.org
Sent: Monday, 6 November 2006 11:52:53 AM
Subject: RE: [Speex-dev] Integrating speex with VideoNet application:
Constantbackground noise
It could be a million different things, unfortunately. Focus on comp...
2006 Sep 16
3
converting 16-bit samples in LPSTR to short
Hi,
I am capturing 16 bit mono sound samples using some Win32 API function
calls. These function calls return the sound samples in an array of
characters. My assumption is that this array of characters represents pairs
of bytes that make up a short integer.
I'm using the following code to convert the samples:
LPTSTR *lpSaveBuffer;
......
for(j=0;j<nBytes;++J)
{
BYTE a =
2006 May 26
4
question about coding
Thanks for the answer.
So data are stored in little-endian format on the WAVE file. But have I to encode in big endian format or little endian is ok?!
Thanks
---------- Original Message ----------------------------------
From: "John Miles" <jmiles@pop.net>
Date: Tue, 23 May 2006 12:15:05 -0700
>You are probably reading little-endian samples on a big-endian platform, and
>failing to flip the byte order. By convention, PCM samples are generally
>little-endian words, and the effect of playing them with the wrong byte
>order i...
2007 Jun 05
2
Output sampling rate slightly increased. Will speex complain?
I noticed my latency is gradually increasing in my audio loopback test application. I just hear what i say, encoding and decoding on the fly.
I suppose 8000 Hz for the output device is not 8000 Hz for the input one, they differs since they could refer to different time generators (i suppose...).
To solve the problem i rised the output sampling rate from 8000 to 8200 Hz, and now i'm not
2007 Oct 04
3
Audio Speed Variability
I have a video conference like application that I've been working on for
a while now, and a recent change is causing some odd problems, and I was
wondering if anyone else had seen problems like this. The issue I'm
seeing is that when using the sound card for capture, the audio will
eventually get about 1-2 seconds out of synch (delayed), from the
video. However, if I use USB devices
2006 Sep 16
0
converting 16-bit samples in LPSTR to short
Is "nBytes" what it says -- the number of bytes in the buffer? If so,
you're overshooting the buffer by 2x by multiplying by 2 in your array
access. You probably want a variable called "nSamples" that represents the
number of 16-bit words.
Also, if this is a little-endian (Windows on x86?) machine, you're
reassembling the word backwards.
Not to mention, shifting a
2007 Jun 05
0
Output sampling rate slightly increased. Will speexcomplain?
It is a good idea not to use sample rates other than 44100 or 48000 Hz for
your final audio I/O. The chipset people just do not give a crap about
rates other than that. They don't see a problem with giving you 11100 Hz
when you ask for 11025, for instance, even though that's a huge problem for
VoIP.
Ultimately you need to be prepared to resample to one of the de-facto
'standard'
2007 Oct 04
0
Audio Speed Variability
> -----Original Message-----
> From: speex-dev-bounces@xiph.org [mailto:speex-dev-bounces@xiph.org]On
> Behalf Of James Stanton
> Sent: Thursday, October 04, 2007 12:53 PM
> To: speex-dev@xiph.org
> Subject: [Speex-dev] Audio Speed Variability
>
>
> I have a video conference like application that I've been working on for
> a while now, and a recent change is
2007 Oct 04
0
Audio Speed Variability
I don't know about the input side; I have personally only experienced being
bitten by the output resampler. But it seems like a safe assumption that
yes, the input side is equally broken.
Any resampling code found on the 'net should be suitable as long as it
sounds good, doesn't take too much CPU, and is compatible with your
product's licensing/distribution terms. There are
2006 Apr 20
3
Recommended version for production use
...xenc.exe tend to contain wild
amplitude-level variations, tonal artifacts, and clipped regions.
Here's a good example of what I'm talking about:
speexenc --bitrate 7500 pcm16k.wav speex.spx
speexdec speex.spx recovered.wav
If you run these commands with the file
http://www.speakeasy.net/~jmiles1/pcm16k.wav in 1.0.4, the recovered.wav
output doesn't sound too bad. Under 1.1.11, the recovered audio sounds
terrible by comparison.
So: what are peoples' thoughts on the best version of Speex to use in
production code? Should I incorporate the current stable 1.0.5 source tree
into my...
2007 Dec 01
3
[PATCH] Add Visual Studio 2008 Prject files
What's wrong with a plain old .bat file, or even an NMAKE .mak file? Ship two files, debug.bat and release.bat, and call it good.
It is best to leave project-file creation up to individual users, in my opinion. MS changes their IDEs and project-file formats more often than most people change their underwear. The odds that any given open-source project will actually compile without any