similar to: echo canceller

I have tested the AEC by file model,but found it doesn't work!The output file I got still had echo. And I have found several version of mdf.c,could you tell me which version I should use? Now I'm using version 1.11.1.1 and under windows there have some bugs. --- Jean-Marc Valin <jean-marc.valin@usherbrooke.ca>??: > > > haven't got the chance to sit down and look into

Look at the manual. There's just too many possibilities to screw up I don't feel like listing them every time. With 8 kHz audio, 20 ms frames and 50-300 ms tail, I can definitely say that it works (as long as you get things right). Jean-Marc Le mercredi 21 d?cembre 2005 ? 13:51 +0800, wu xudong a ?crit : > I have tested the AEC by file model,but found it > doesn't work!The

Hi, I am just starting up on SPEEX AEC algorithm and have couple of questions around echo cancelation algorithm used in SPEEX. 1) Usually Echo Cancelation Algorithm has support for number of components ? - Non-Linear Processor (NLP) - Automatic Microphone Gain Control (AGC) - Transducer Equalization (EQ) - Dynamic Range Compression (DRC) - Ambient

I am specifically using Celt Wideband (48kHz) over WiFi multicast that naturally leads to lost packets and am trying to minimize the impact to the audio. I implemented PLC but the audio it produces is robotic. Have I implemented PLC correctly? Checking the waveform it is using the previous received waveform to fill in a missing packet but not the full waveform so it has to repeat. Basically,

> misc.c provides the ability to override some functions, including the > allocation and printing. fftwrap.c uses speex_alloc, then calls > kiss_fftr_alloc, which calls kiss_fft_alloc, which calls KISS_FFT_MALLOC, > which is defined as malloc in kiss_fft.h. It would make it more consistent > to define KISS_FFT_MALLOC as speex_alloc. That is the only change that I > would

> Build 11387 produces the same result as my modified build 11343. Because of > compiler limitations in the TI tools, I did have to make modifications to > pseudofloat.h (separating return of float values) and nb_celp.c (adding > braces around a variable declaration in the middle of code). I have > attached a patch. You might prefer to do the nb_celp.c change in a >

On Aug 7, 2009, at 21:48, Didier Dambrin wrote: > FLAC doesn't preserve every chunk? I thought it did. I only gave a > quick try > but it seemed to have preserved even the most obscure chunks. > Let me check: it even seems to preserve "MIDI note associated to > marker", > which is a very unknown metadata used by SoundForge (& even defined > in a >

Hi, But in fact, it really affects the voice quality. One of my tester says, "Is your mouth far way from the mic?" Could you explain why we should cut 200hz below? >The notch filter is specifically designed to cut below 200 Hz when >working in narrowband. In wideband, the cutoff is more around 50 Hz. The >reason is that in narrowband operation (irrespective of the

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

On Aug 8, 2009, at 23:11, Didier Dambrin wrote: > Electronic music quite often doesn't leave a computer these days. > And it > mainly consists of drums, synths & vocals/effects. Drums are often > samples > sequenced at sample (not sub-sample) accuracy, thus repeated (of > course if > the song was post-resampled, there will be sub-sample times). Good point. I

The builds that I referred to in my last mail should be 11398 and 11387, not 11387 and 11343. Sorry for any confusion. - Jim ----- Original Message ----- From: "Jim Crichton" <jim.crichton@comcast.net> To: "Jean-Marc Valin" <Jean-Marc.Valin@USherbrooke.ca> Cc: <speex-dev@xiph.org> Sent: Wednesday, May 10, 2006 11:47 AM Subject: Re: [Speex-dev] Speex echo

>> My builds for the two platforms used exactly the same source files, >> though >> there were a few ifdefs in the test_echo routine to deal with file I/O >> for >> the C55 with its 16-bit char size. When I get a chance, I will add some >> instrumentation and see if I can find where things diverge. Just looking >> at >> the canceled audio files

>> When the dust >> settles, I will send a patch with additions to the TI directory for the >> echo >> canceler example, including instructions on these last changes. Also, I >> would like to modify the memory allocation to follow the same structure >> as >> the encoder/decoder, including the ability to override the malloc >> function. >

On Nov 4, 2006, at 8:30 AM, Wesley Shields <wxs@atarininja.org> wrote: > > On Fri, Nov 03, 2006 at 07:54:59AM -0800, Ricardo A. Reis wrote: > [...] >> In the II COLARIS - Joanna Rutkowska alert the possible >> new technology of Malware's using hardware virtualization, present >> in AMD and INTEL new processor. >> >> I've two questions ...

Hi! I have a few questions considering echo cancellation algorithm in Speex: 1. In the manual it's stated that the delay between the input signal and the echo signal must be small. How small should it be? Is for example 100 ms acceptable? 2. Does echo cancellation algorithm deal well with situation, when one of the users of Speex-based VOIP application has "record-what-you-here"

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I wish to preserve the state of the echo canceller engine when it is in a converged state, in order to use this for a later, separate VoIP connection. However, any jitter in processing delay from playback to record might make this impossible. From the manual: Latency and algorithmic delay Every speech codec introduces a delay in the transmission. For Speex, this delay is equal to the

Thanks to Jakob's work on Sparcv9 ABI in Clang and recent changes to Sparc code generator, I am happy to announce that Clang can self host itself on Linux/Sparc64 and on FreeBSD/Sparc64. However, it still fails on a few unit tests and nightly tests, primarily due to misaligned memory accesses in the code (See bugs 18482, 18500, 18502, 18536, 18693). Unlike other architectures, misaligned

Hi Peter, The attached patch is a workaround for the XMM misalignment issue. Basically it uses the fallback method of saving and restoring registers on the stack, which does work correctly with alignment. If I recall correctly it also doesn't save any registers unnecessarily, but I could be wrong about that. Anyway, it's hack, but if all you want for now is to be able to work with Win64

An NA in the rownames of a matrix (or dataframe) causes misalignment when the matrix is printed: R> x <- matrix(1:12, 3,4, dimnames=list(letters[1:3], LETTERS[1:4])) R> rownames(x)[2] <- NA R> x A B C D a 1 4 7 10 <NA> 2 5 8 11 c 3 6 9 12 The bug is in function Rstrlen, in src/main/printutils.c. MatrixRowLabel and MatrixColumnLabel (same file) rely on Rstrlen