search for: concealing

Hi, I'm a developer currently using the speex codec in a VOIP application of ours.. It sounds amazing, especially at wideband.. my question is how do I force it to do a concealment? We have a low latency application, and based on the current API, I'm guessing concealment only kicks in when a packet is lost.. However, our jitter buffer knows when a packet is missing, and I'd like to

Hi, I would like to know which method uses Speex to conceal the loss of packets. I've reviewed the code and haven't found anything. Thanks in advance. Iago Soto. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://westfish.xiph.org/pipermail/speex-dev/attachments/20040614/bfa135e0/attachment.htm

Hi all, I am developing a VoIP application and have used SPEEX for that purpose; I successfully managed to port the codec in fixed-point to an ADSP-21364 processor, and the codec works fine in narrowband, wideband and ultra-wideband mode. Currently, I have chosen, in accordance with the speex manual, a 20 ms frame size in each of these modes: in other words, the input buffer for speex was set to

Hi, I am an engineering student in IIT Guwahati, India. Currently, as a summer project I am working on 'packet loss concealment in voip scenario'. I am eager to know what PLC methods are used at receiver end of speex decoder. And if I could develop some more efficient method I could able to contribute to the speex. Actually, I searched the whole speex manual but failed to find what

Hi Does anyone know where one can get hold of a G729 codec for asterisk which effectively can do packet loss concealment using Steve Kann's wonderful new Jitter buffer. The 2 versions that I know of, (digium's and the IPP one) do not perform great at PLC, especially with 4 or 5% loss. Thanks in advance. Clive

Hi, We are planning to use Speex as the speech codec for a VoIP application. 1) May I know how Speex compared with GIPS codec? It seems that Google, Yahoo, and Skype are licensing from GIPS. Are there any good benchmarking or fair comparisons? 2) In particular, how is the jitter buffer control for Speex in response to intermitent poor connection hiccups? Is it robust enough to smooth out

> Obviously this is Jean-Marc's decision and I'm not telling > him not to support this compiler. I am however pointing > out that this compiler is yet more work for very little > payoff. In the case of my project, the proponent of C++ > Builder sent me a huge, monsterously ugly and totally > unmaintainable patch to add C++ Builder support. Needless > to say, that

Hi, We have Asterisk, running on a P4 box running Suse 9.1, making calls using IAX through SimpleTelecom and Nufone. What we are looking for is toll quality voice. The problem is that voice over calls routed through SimpleTelecom and nNufone occassionally breaks. We also have a digium card and the calls over the digium card using the Zaptel Interface have a very good quality. We

Hi All I have recently downloaded Asterisk and was so impressed I thought I would setup a home server and I went out and got myself a couple of cisco 7940's. (and a sipaura 3000!). thanks to various posts on this list and the voip-info site I have managed to get chan_sccp setup and working with the 7940's but the I tried to get the messages, services and softkeys working. It seems

> 1) May I know how Speex compared with GIPS codec? It seems that Google, > Yahoo, and Skype are licensing from GIPS. Are there any good benchmarking > or fair comparisons? I think these two emails sum up my opinion about Speex vs. iLBC: http://lists.xiph.org/pipermail/speex-dev/2005-June/003410.html http://lists.xiph.org/pipermail/speex-dev/2005-September/003652.html > 2) In

Hello, I have been running Shorewall for quite some time at an ISP client of mine to protect his LAN. We have just upgraded to 2.2.4 and he now wants to put his servers in a DMZ. The servers have public IPs in two classes xxx.xxx.79.0 and xxx.xxx.242.0. The public IP on the router for each class is xxx.xxx.79.126 and xxx.xxx.242.126. I am using masq and 192.168.1.0 on eth0 LAN I have tried

Le jeudi 22 septembre 2005 ? 08:19 +0800, Joe Anny a ?crit : > Thanks, Jean for the clarification. My first name's Jean-Marc, not Jean... > I look forward to delving into your tutorial codes. What we hope is to use > Speex as the primary voice codec. We also hope to get a quick start into > the programming aspects with buffer management, denoising, etc. taken care > of (or

Hi, I have read the mailing list archives and have a question regarding PLC (packet loss concealment).

In my layout I have a navigation bar with a few elements in it. The elements can be toggled on or off and thereby reveal or conceal some subtopics. I store the state of the toggle for the navigation elements in the session. When the page is reloaded, the navigation items are collapsed because the css for display: none is set by default in the html for the navigation elements. Is there a

Hi I get this mailing-list as a digest (as everyone does, i guess). This is quite inconvinient for answering single questions.. I every digest there is a message with Subject: Re: Samba dingest <NR>... This makes it hard to keep track about whath message the replay is ment for. Another problem is, that mime-attachments don?t seem to work. This is especially bad, because some Microsoft

for the bits init I am using speex_bits_set_bit_buffer and I don't use the write to or read from because the data is already in the buffer I am reading from and I am writing to the final buffer so I don't need to move arrays around. what part is the vocoder part of the decode? Thanks for your help! -Mike >>> Jean-Marc Valin <jean-marc.valin@usherbrooke.ca> 08/06/07

Hello, I'm experiencing some problems with running IAX2 protocol on quite reliable link with G729A codec. My customer has 2mb FR link to the Internet used in about 20%. Ping statistics: 50 packets transmitted, 49 received, 2% packet loss, time 49496ms rtt min/avg/max/mdev = 9.308/13.126/33.307/4.851 ms Everything would be great, but the quality isn't good enough. I have 2mb/512kb DSL

I know this is OT, but I'm not sure where else to ask. I can hope for fogiveness! :) My home router sends its logs to the rsyslog on my desktop system, and from there I can learn all kinds of interesting (or disturbing) things. I've written a really horrid shellscript (about 20 things piped together with a temp file in the middle) to give me the count of DROP events for specific incoming

Narrowband (8 kHz), wideband (16 kHz), and ultra-wideband (32 kHz) compression in the same bitstream What is the meaning of this? can i find more information about this somewhere? And what is packel loss concealment, an you enable this somewhere? thanks! -------------- next part -------------- An HTML attachment was scrubbed... URL:

> Err, unless I'm totally wrong, there are a few race conditions. > > Assume the buffer is full of packets newer than the current pointer, and > one that is at the current pointer. > > get and put start at the same time. > > get will find the correct buffer index. Now, just after it finds it's > index, assume we switch to the put thread. > > Put needs