search for: speexechostate

Hello, I would like to test the echo cancel algorithm available in unstable version 1.1.4. This echo canceller can be used with other codecs like G711? Somebody could send me some documentation or sample, or explain the next functions: SpeexEchoState *speex_echo_state_init(int frame_size, int filter_length); void speex_echo_state_destroy(SpeexEchoState *st); void speex_echo_cancel(SpeexEchoState *st, float *ref, float *echo, float *out, float *Y); Thank you very much. Best regards. G. --- >8 ---- List archives: http://www.xiph.org/archiv...

...) { if (bits->bitPtr) speex_bits_pack(bits, 0, 1); Index: libspeex/mdf.c =================================================================== --- libspeex/mdf.c (revision 14645) +++ libspeex/mdf.c (working copy) @@ -378,7 +378,7 @@ #endif /** Creates a new echo canceller state */ -SpeexEchoState *speex_echo_state_init(int frame_size, int filter_length) +EXPORT SpeexEchoState *speex_echo_state_init(int frame_size, int filter_length) { int i,N,M; SpeexEchoState *st = (SpeexEchoState *)speex_alloc(sizeof(SpeexEchoState)); @@ -495,7 +495,7 @@ } /** Resets echo canceller state */ -...

...) { if (bits->bitPtr) speex_bits_pack(bits, 0, 1); Index: libspeex/mdf.c =================================================================== --- libspeex/mdf.c (revision 14645) +++ libspeex/mdf.c (working copy) @@ -378,7 +378,7 @@ #endif /** Creates a new echo canceller state */ -SpeexEchoState *speex_echo_state_init(int frame_size, int filter_length) +EXPORT SpeexEchoState *speex_echo_state_init(int frame_size, int filter_length) { int i,N,M; SpeexEchoState *st = (SpeexEchoState *)speex_alloc(sizeof(SpeexEchoState)); @@ -495,7 +495,7 @@ } /** Resets echo canceller state */ -...

...ack variable rather than to the memory location pointed to by the stack variable. Code snippet from preprocess.c: case SPEEX_PREPROCESS_GET_ECHO_STATE: ptr = (void*)st->echo_state; break; It seems as though the code should be: case SPEEX_PREPROCESS_GET_ECHO_STATE: (*(SpeexEchoState*)ptr) = (SpeexEchoState*)st->echo_state; break; PS - Sorry if this has already been received. I sent this yesterday before realizing that I hadn't subscribed to the mailing list. Jeff Kinzer Software Developer COMOTIV SYSTEMS 111 SW Columbia?Street Ste. 950 Portland,?OR 97201 Office...

Hi Anton Thanks for the info... What if I use this function do I still need to sync the playback and capture? Assuming that the captured voice (*rec) already contains the echo which I need to cancel out... -------------------------------- void speex_echo_capture (SpeexEchoState *st, const spx_int16_t *rec, spx_int16_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...

...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() 4. then, will it be possible to encode the output buffer from speex_echo_capture() to any codec? Like G711? GSM? etc.... I'm quite new to audio format concepts/development, so if you have any ideas your advic...

.... This echo canceller can be used with other codecs like G711? If by "used with other codecs", you mean that you can use the result as input to any codec you like, the answer is yes. > Somebody could send me some documentation or sample, or explain the next > functions: > > SpeexEchoState *speex_echo_state_init(int frame_size, int filter_length); frame size is the number of samples you want to process at once. Recommended is in the order of 256 (ideally a power of 2, but other values will work). filter_length is the approximate length you want your filter to be. For example, if you...

Hello guys, I want to make echo tail parameter in my app changeable during run-time. So my question is:f Should I use speex_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?

...http://permalink.gmane.org/gmane.comp.audio.compression.speex.devel/6913 It is not integrated into the main git tree though. Regards, Simon On 26/05/2011 21:21, Stuart O Anderson wrote: > This is not part of the current API. It shouldn't be too hard add a > serialization routine for SpeexEchoState. > > Stuart > > On Thu, May 26, 2011 at 12:07 PM, Maris Engineering<mail at maris-ee.eu> wrote: >>> Yes, you are not forced to reset the AEC between calls at all, if you >>> can assume the actual echo path (physical environment) will not change >>> much...

Hello, We are experiencing a few problems with Speex AEC. We are using it to process audio data on a real time stream over IP with Speex codec (frame size = 320). We initialize the echo state like this : SpeexEchoState * echo_state; echo_state = speex_echo_state_init(320,512); int sr = 16000; speex_echo_ctl(echo_state, SPEEX_ECHO_SET_SAMPLING_RATE,&sr); We are not really sure about the values in parameters, please tell us if you see something wrong about them. we process the data like this : speex_ec...

...io thread: Write to codec speex_echo_playback(echo_state, echo_frame); Capturing audio thread: Receive buffer speex_echo_capture(echo_state, input_frame, output_frame); We have compiled for fixed point. We are using codec buffer size of 256 bytes ie 128, 16bit samples. SpeexEchoState* iEchoState = speex_echo_state_init(ECHO_FRAME_SIZE, ECHO_FILTER_SIZE); ECHO_FRAME_SIZE = 128 ECHO_FILTER_SIZE = 1024 Any ideas? Do you know whether any one has this running on Windows Mobile platforms successfully. Regards --------------------------------- Sent...

...rSample; //will contain what the speakers are going to play short * microphoneSample; //what the microphone is going to register short* cancelledSample; //the ouput without echo int* cancelledSpectrum; //output cancelled spectrum //now i assume that i should initialise everything like that: SpeexEchoState* pechoState = speex_echo_state_init(160,x*160); //do the second parameter need to be a multiple of the frame size? AllocBuffers(SpeakerSample,microphoneSample,cancelledSample,cancelledSpectrum); do{ captureSpeaker(speakerSample); captureMicrophone(microphoneSample); speex_echo_cancel(pechoState,...

...v] Using Speex Echo Canceller Hi Anton Thanks for the info... What if I use this function do I still need to sync the playback and capture? Assuming that the captured voice (*rec) already contains the echo which I need to cancel out... -------------------------------- void speex_echo_capture (SpeexEchoState *st, const spx_int16_t *rec, spx_int16_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...

> Yes, you are not forced to reset the AEC between calls at all, if you > can assume the actual echo path (physical environment) will not change > much, you can keep the instance and continue using it for the next call. > > Also what we did was keep the AEC running between calls - but we had a > rather high-duty system with sounds and signals played between calls, so > the AEC

? hi all, i am using the Acoustic Echo Cancellation from "Speex 1.1.12 version" in my VOIP application. Is it that the frame length to be chosen should always be 20ms or can i have flexibility in chosing the frame lenght? on what parameters does the frame length choise depends? thank you all, Shri. -------------- next part -------------- An HTML attachment was scrubbed... URL:

Probably the level of your signal is too low and/or you're just not letting it time to adapt. Jean-Marc Le mercredi 19 juillet 2006 ? 19:00 -0400, ac2491@columbia.edu a ?crit : > On closer looks and debugging I always end up in > > speex_echo_cancel function with comment > /* Temporary adaption rate if filter is not adapted correctly */ > > > Does this give any clue

...eakers are going to play > short * microphoneSample; //what the microphone is going to register > short* cancelledSample; //the ouput without echo > int* cancelledSpectrum; //output cancelled spectrum > > //now i assume that i should initialise everything like that: > > SpeexEchoState* pechoState = speex_echo_state_init(160,x*160); //do the > second parameter need to be a multiple of the frame size? > AllocBuffers(SpeakerSample,microphoneSample,cancelledSample,cancelledSpectrum); > > do{ > captureSpeaker(speakerSample); > captureMicrophone(microphoneSample);...

...============================== --- libspeex/testecho.c (revision 10661) +++ libspeex/testecho.c (working copy) @@ -17,7 +17,7 @@ int main(int argc, char **argv) { int echo_fd, ref_fd, e_fd; - float noise[NN+1]; + spx_int32_t noise[NN+1]; short echo_buf[NN], ref_buf[NN], e_buf[NN]; SpeexEchoState *st; SpeexPreprocessState *den;

Welcome everybody. I am new here on the list. Thank you very much for speex encoder and decoder. They are working great. I compile speex coded for str911 Arm processor. But I have a big problem with echo canceller from 1.1.12 speex package. I create echo canceler state: SpeexEchoState * echo_state = speex_echo_state_init(FRAME_SIZE, FRAME_SIZE * 5); FRAME_SIZE is in my project 160 samples. I have 8000ksaples/s, so I must call echo canceler every 20ms. and later in the loop I call it: speex_echo_cancel(echo_state, (short *)Samples, (short *)SamplesSpeaker, (short *)SamplesO...

...el 1 in++; // channel 2 } in_left = in_buffer_calc; speex_bits_reset(&g_Bits); // Encode the frame speex_encode_int(g_pvEnc, (spx_int16_t *)in_left, &g_Bits); nbBits = speex_bits_write(&g_Bits, cbits, 200); speex_bits_rewind(&g_Bits); SpeexEchoState *st= speex_echo_state_init(SPEEX_FRAME_SIZE,filter_length); speex_echo_cancel(st,(spx_int16_t *)in_left,(spx_int16_t *)out_left,(spx_int16_t *)out2,NULL); speex_echo_state_destroy(st); // Decode the frame speex_decode_int(g_pvDec, &g_Bits, (spx_int16_t *)out_left); #ifdef...