search for: gramsci

But that's what a jitter buffer will do, eventually - drop a packet. And it's better to drop a silence packet. Cheers, .a -----Original Message----- From: Jean-Marc Valin [mailto:jean-marc.valin@usherbrooke.ca] Sent: Wednesday, December 21, 2005 3:39 PM To: Alex Bakaev Cc: Shantanu Gramsci; speex-dev@xiph.org Subject: RE: [Speex-dev] Bitrate problem On Wed, 2005-12-21 at 15:29 -0800, Alex Bakaev wrote: > This is a common problem. Sound cards run at different clock speeds > (but your difference seems kinda high). > What I'd suggest is dropping silence packets once in a...

...- > drop a packet. And it's better to drop a silence > packet. > > Cheers, > .a > > -----Original Message----- > From: Jean-Marc Valin > [mailto:jean-marc.valin@usherbrooke.ca] > Sent: Wednesday, December 21, 2005 3:39 PM > To: Alex Bakaev > Cc: Shantanu Gramsci; speex-dev@xiph.org > Subject: RE: [Speex-dev] Bitrate problem > > On Wed, 2005-12-21 at 15:29 -0800, Alex Bakaev > wrote: > > This is a common problem. Sound cards run at > different > clock speeds > > (but your difference seems kinda high). > > What I'd s...

This is a common problem. Sound cards run at different clock speeds (but your difference seems kinda high). What I'd suggest is dropping silence packets once in a while. .a -----Original Message----- From: speex-dev-bounces@xiph.org [mailto:speex-dev-bounces@xiph.org] On Behalf Of Shantanu Gramsci Sent: Wednesday, December 21, 2005 2:05 PM To: speex-dev@xiph.org Subject: [Speex-dev] Bitrate problem Hello all, This is a bit off topic but I am sure many of you can answer it. I use speex and speex-wb in my VOIP application. With speex [at 8 KHz] bitrate is arround 30KBPS, including UDP,RTP h...

Hello all, I use speex as codec [narrowband and wideband], echo canceller and preprocessor. I was able to use it in all case except in echo cancellation. I found that in my application, echo cancellation works only if echo tail [echo filter length] is arround 2000 ms or more. But recomended value in the documentation is 100 ms. With 2000 ms echo tail echo cancellation works fine but it takes

Hello All, I use AGC as one of speex preprocess options in VOIP application. In most cases it works very fine. However, at the very beginning of a call when no one has started talking [ and some times in the middle of calls], AGC makes large noise and it gradually increases. Interestingly, when someone starts talking, from that point it works very well. Is it the normal behaviour? Since

Oh, I forgot to mention one thing. I currently append a few bits of custom information to each speex packet which I fetch out with things like speex_bits_unpack_unsigned(&sjJitter.current_packet, 1); It would be very usefull if the jitter buffer didn't actually decode the packet, but instead returned a pointer to it (or NULL if you should play silence and -1 if you should repeat the

Hello all, I am new to speex. Can anyone please mention name/links to open source projects that use speex for echo cancellation [not only codec]. Thanks in advance --Shantanu --------------------------------- Yahoo! Mail Stay connected, organized, and protected. Take the tour -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hello all, This is a bit off topic but I am sure many of you can answer it. I use speex and speex-wb in my VOIP application. With speex [at 8 KHz] bitrate is arround 30KBPS, including UDP,RTP headers. This is OK for me and I get good quality audio. Problem is, if call is made from a HIGH END machine [like P4 3.2 GHz with good soundcard] to a LOW END machine [like P3 550 MHz], high end pc sends

It seems that speex jitter buffer is tightly coupled with SPEEX codec [we have to give a speex decoder instance to JB]. It would be better if we could use it with any codec, like speex preprocessor and AEC. What are the any paper/theory/algorithms behind current ADAPTIVENESS of speex JB? Links to those algo/papers would help to understand better. -- Shantanu --- Thorvald Natvig

Hi, I use speex1.1.10 [June 10, 2005]in my VoIP application and it works very good for me. But sometimes I get loud metalic noise. Turning off EC, disappears the noise right away. I use EC with denoiser ON, AGC OFF, echo tail 400 ms. Has anyone experienced this? Since Speex1.1.11 has improvement for EC, I tried with the latest release [Speex1.1.12, which has fixed point EC]. But in my test, EC

Dear all, I need to use echo cancellation in a VOIP application using speex narrowband codec.I am facing some problems with echo cancellation. It will be very helpfull if someone can put some light on the following issues. 1: =================== -- When call is started EC works fine for first few seconds. Bur after a certain period [usually 20 sec or more] it does not work or works very bad