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...machine, while on others using XP, Vista and 7 everything is fine. Crash occures in mdf.c line 434: st->spec_average = DIV32_16(SHL32(EXTEND32(st->frame_size), 15), st->sampling_rate); Got any ideas or should I provide more information of the OS? Thanks a lot! Regards, Anton A. Shpakovsky -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/speex-dev/attachments/20100615/11d7036b/attachment.htm

...t *out) Parameters: st Echo canceller state rec signal from the microphone (near end + far end echo) out Returns near-end signal with echo removed ---------------------------------- thanks & regards, Chris Adoremos On Wed, Sep 29, 2010 at 5:46 PM, Anton A. Shpakovsky <saa at tomsksoft.com>wrote: > Hi > > > > Yes, it's absolutely unnecessary to use speex codec. You can encode the > echo cancelled auido data with any codec you want. > > The Echo Canncelation API is here - > http://www.speex.org/docs/api/speex-api-reference/gr...

...e using two or more speakers. If the > speakers are not at the exact same distance from the mic, you will get more > than one echo. AEC can not handle that. Try disconnecting all but one > speaker and see if it makes any difference. > > cheers > Greger > > 2010/3/15 Anton A. Shpakovsky <saa at tomsksoft.com> > > > Hello. > > > > I have the following situation. AEC is used in network chat software > > > > over DirectSound API. Echo and reference signals are almost aligned > > > > (delay is no more than 30ms). When echo is emulate...

...dshare.com/files/317389207/speex_AEC_test.rar.html nb_*** - working configuration (notebook) sa_*** - standalone speakers with no echo removed Can it be because of differences in fixed and arbitrary acoustic systems? I will appreciate any of your advises or thoughts. Thanks! Anton A. Shpakovsky Multimedia Software Developer -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/speex-dev/attachments/20100315/e9ffff48/attachment.htm

...o_capture) and you will get clean frame in "out" buffer. The sync is very important - because speex_echo_capture won't be able to remove clean echo frame that you didn't provide with speex_echo_playback. I hope I didn't messed up anything :) Best Regards, Anton A. Shpakovsky From: Christopher Adoremos [mailto:chrisadoremos at gmail.com] Sent: Thursday, September 30, 2010 11:52 AM To: Anton A. Shpakovsky Cc: speex-dev at xiph.org Subject: [SPAM] [BombData][alltestmode] Re: [SPAM] [BombData][alltestmode] [Speex-dev] Using Speex Echo Canceller Hi Anton Thanks...

...tion is a better choise. Try using it in capture thread instead of those speex_echo_capture and speex_echo_playback functions. And please, describe your problem in details. Cause the fact that you "didn get echo cancellation" doesn't mean you are doing smth wrong. Regards, Anton A. Shpakovsky -----Original Message----- From: speex-dev-bounces at xiph.org [mailto:speex-dev-bounces at xiph.org] On Behalf Of devi Sent: Tuesday, July 20, 2010 3:13 PM To: speex-dev at xiph.org Subject: [SPAM] [BombData][alltestmode] Re: [Speex-dev] Speex Echo Cancellation > > > Message: 1 > &...

Sorry, I've forgot to mention init params: Frame_size is 441 samples and filter_length is 4096. ..don't think it makes any sense though.. Regards, Anton A. Shpakovsky From: speex-dev-bounces at xiph.org [mailto:speex-dev-bounces at xiph.org] On Behalf Of Anton A. Shpakovsky Sent: Tuesday, June 15, 2010 4:15 PM To: speex-dev at xiph.org Subject: [Speex-dev] AEC init crashes Hello, I've just caught a strange crash in speex_echo_state_init routine....

...ot at the exact same distance from >>> the mic, you will get more than one echo. AEC can not handle >>> that. Try disconnecting all but one speaker and see if it makes >>> any difference. >>> >>> cheers Greger >>> >>> 2010/3/15 Anton A. Shpakovsky<saa at tomsksoft.com> >>> >>>> Hello. >>>> >>>> I have the following situation. AEC is used in network chat >>>> software >>>> >>>> over DirectSound API. Echo and reference signals are almost >>>> ali...

Hi Is it possible to use only the speex echo cancellation module w/o using the speex codec? Here's the scenario: 1. I have my voice recorded in PCM audio file format 2. I want to cleanup the recorded voice by removing any echo included in the audio file/buffer 3. can I just use the ff APIs? - SpeexEchoState* speex_echo_state_init() - int speex_echo_ctl() - void speex_echo_capture()

...ood for me. And again - no noticeable AEC doesn't mean you're doing smth wrong. Play with params, read the manual. Cause number '20you're your speex_echo_state_init call shows you're not good with http://speex.org/docs/ p.s. Would be Happy if helped somehow. Regards, Anton A. Shpakovsky -----Original Message----- From: speex-dev-bounces at xiph.org [mailto:speex-dev-bounces at xiph.org] On Behalf Of devi Sent: Tuesday, July 20, 2010 5:17 PM To: speex-dev at xiph.org Subject: [BombData][alltestmode] Re: [Speex-dev] [SPAM] [BombData][alltestmode] Re: Speex EchoCancellation Anton...

One thing I can think of is if you are using two or more speakers. If the speakers are not at the exact same distance from the mic, you will get more than one echo. AEC can not handle that. Try disconnecting all but one speaker and see if it makes any difference. cheers Greger 2010/3/15 Anton A. Shpakovsky <saa at tomsksoft.com> > Hello. > > I have the following situation. AEC is used in network chat software > > over DirectSound API. Echo and reference signals are almost aligned > > (delay is no more than 30ms). When echo is emulated in notebook > > (built-in speak...

...; speakers are not at the exact same distance from the mic, you will get > more > > than one echo. AEC can not handle that. Try disconnecting all but one > > speaker and see if it makes any difference. > > > > cheers > > Greger > > > > 2010/3/15 Anton A. Shpakovsky <saa at tomsksoft.com> > > > > > Hello. > > > > > > I have the following situation. AEC is used in network chat software > > > > > > over DirectSound API. Echo and reference signals are almost aligned > > > > > > (delay is...

...stance from the mic, you > will get more > > than one echo. AEC can not handle that. Try disconnecting all but one > > speaker and see if it makes any difference. > > > > cheers > > Greger > > > > 2010/3/15 Anton A. Shpakovsky <saa at tomsksoft.com > <mailto:saa at tomsksoft.com>> > > > > > Hello. > > > > > > I have the following situation. AEC is used in network chat > software > > > > > > over DirectSound API. Ec...

...he >> speakers are not at the exact same distance from the mic, you will get more >> than one echo. AEC can not handle that. Try disconnecting all but one >> speaker and see if it makes any difference. >> >> cheers >> Greger >> >> 2010/3/15 Anton A. Shpakovsky <saa at tomsksoft.com> >> >>> Hello. >>> >>> I have the following situation. AEC is used in network chat software >>> >>> over DirectSound API. Echo and reference signals are almost aligned >>> >>> (delay is no more than...

Anton A. Shpakovsky <saa <at> tomsksoft.com> writes: > > As for me - speex_echo_cancellation is a better choise. Try using it in > capture thread instead > of those speex_echo_capture and speex_echo_playback functions. > > And please, describe your problem in details. Cause the fact th...

...ops / pauses and starts speaking again in a single session. I am using a laptop with standalone speakers. For echo cancellation to work one has to make sure that the ref and echo buffers are synchronized. I guess this is the most common problem. -Elston -----Original Message----- From: Anton A. Shpakovsky [mailto:saa at tomsksoft.com] Sent: Monday, May 10, 2010 2:43 PM To: Elston Sa; speex-dev at xiph.org Subject: RE: [Speex-dev] AEC - Echo is cancelled however..... Well, AFAIK AEC engine needs time to adapt. So probably that's why at the beginning of the conversation you hear the consequences...

...g a laptop with standalone speakers. For echo cancellation to > work >> one has to make sure that the ref and echo buffers are synchronized. I > guess >> this is the most common problem. >> >> -Elston >> >> -----Original Message----- >> From: Anton A. Shpakovsky [mailto:saa at tomsksoft.com] >> Sent: Monday, May 10, 2010 2:43 PM >> To: Elston Sa; speex-dev at xiph.org >> Subject: RE: [Speex-dev] AEC - Echo is cancelled however..... >> >> Well, AFAIK AEC engine needs time to adapt. So probably that's why at >> the beg...

1) Everytime a participant speaks there is a echo for a short duration (maybe a word or two) but as the participant continues to speak without a any break the echo is 95% cancelled (i.e there is a feeble echo still present if observed very carefully). 2) The moment the participant stops / pauses speaking and start talking again, scenario 1 is repeated as if the echo state has been re-initialized

...ipermail/speex-dev/2009-November/007550.html but you didn't answered. I'm starting to investigate this problem in a couple of days, and I really want to hear from you if you faced the described problem earlier and know the solution. Looking forward to hearing from you, Anton A. Shpakovsky Multimedia Software Developer TomskSoft LLC. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/speex-dev/attachments/20100301/e35c1543/attachment-0001.htm

..._echo_state_reset function for this? Just call speex_echo_state_init function with new values after that? Or perform a full de-initialization and initialize echo cancellation with new tail value? I'm also using preprocessor - does the same apply to it? Thanks! Regards, Anton A. Shpakovsky -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/speex-dev/attachments/20100526/634d0439/attachment.htm