search for: lpcs

...xx(i) - sum(lpc*Rxx)] / [error + 0.003* Rxx(0)] first question is why is negative of Rxx(i) added? from the resources i gather positive Rxx(i) is added. second is what is the motivation behind adding 0.003*Rxx(0) to error? 3) a more general question: i have not been able to find any reason why 10 lpcs are used. i suppose 10 lpcs are enough for prediction and using more coeffs would not have made too much difference. and 10 is even, good for lpc->lsf. had read somewhere "historically", during the analog era, this number is used. or maybe 10 is analagous to a perfect number! ;-)...

hi, thanks for answers to my previous qns. have some more of them. hope it's ok to ask questions on the basics of CELP here. let me know if it's not. 1) synthesized filter stability after interpolation of LSFs I read from some resources that if LSF representation of LPCs is used for interpolation, stability of the synthesis filter is guaranteed. from another source, i read that the stability of the interpolated LSF synthesis filter is satisfied only by preserving the intra-model interlacing theorem (the LSFs are interlaced with each other for a given LP analysis o...

> 3) a more general question: > i have not been able to find any reason why > 10 lpcs are used. i suppose 10 lpcs are > enough for prediction and using more coeffs > would not have made too much difference. > and 10 is even, good for lpc->lsf. had read > somewhere "historically", during the analog > era, this number is used. or maybe 10 is analagous &...

...t of the encoder function in nb_celp.c. The encoder seems to call the autocorr() function, then calls wld() to do something called Levinson-Durbin. Am I right in thinking that after the call to wld(), the st->lpc[] array contains the coefficients? Later on it computes "interpolated" LPCs -- are these what I want? Thanks again for the help -- it's appreciated! On 2/2/07, Jean-Marc Valin <jean-marc.valin@usherbrooke.ca> wrote: > > > I'm interested in doing phoneme extraction, and one of the first steps > in > > the algorithm I'm planning to use...

...celp.c. L'encodeur semble appeler la autocorr () la fonction, puis appelle wld () pour faire quelque chose qui s'appelle Levinson-Durbin. Suis-je raison de penser que, apr?s la Appelez pour wld (), le St-> lpc [] tableau contient les coefficients? Plus tard, on calcule ?LPCs" interpol?e - sont-ils ce que je veux? Merci encore pour l'aide - c'est appr?ci?! ? Moi aussi, j?ai la m?me question que vous et mon but est de trouver les coefficients LPC, dans la m?thode wld <http://jspeex.sourceforge.net/doc/org/xiph/speex/Lpc.html#wld(float[], float[]...

Hi everyone! It's my first time posting to this list, and I've got a fairly technical question. I'm interested in doing phoneme extraction, and one of the first steps in the algorithm I'm planning to use is to get the LPC coefficients for an input frame. Since Speex is CELP-based, the coefficients must be generated in there somewhere. I've tried digging around in the source

thanks to all of the great work that has been done to listview, my app is finally readable. cudos on the latest patch that fixed up text (that was getting truncated), it's correct this time around. anyways, the one thing missing to get my app working is column sorting (done by clicking a header). i have below the output from a "trace+listview,trace+header" run of the app, clipped

...= ((char*)st) + sizeof(EncState); #endif if (!st) return NULL; st->mode=m; st->frameSize = mode->frameSize; st->windowSize = st->frameSize*3/2; st->nbSubframes=mode->frameSize/mode->subframeSize; st->subframeSize=mode->subframeSize; st->lpcSize = mode->lpcSize; st->gamma1=mode->gamma1; st->gamma2=mode->gamma2; st->min_pitch=mode->pitchStart; st->max_pitch=mode->pitchEnd; st->lag_factor=mode->lag_factor; st->lpc_floor = mode->lpc_floor; st->submodes=mode->submodes; st...

...format checking. setupx.dll16: Fix error handling in VCP_VirtnodeCreate. setupx.dll16: Simplify VcpClose16 a bit. user32: Fix error handling in BITMAP_Load. configure: Improve formatting of error when X development files are not found. comctl32: Remove unused parameter lpcs from TOOLTIPS_Create. widl: Avoid duplicate assignments in resolve_expression. setupx.dll16: Remove some unused code from VCP_CheckPaths. Hans Leidekker (25): msi: Handle fdintNEXT_CABINET and fdintPARTIAL_FILE for cabinet streams. advapi32: Fix handling of zero account and...