Hi! Go to "3gpp2.org" site. It exsited floating, Fixed source code and test vector in the site. Good lucky!! ...

Hi! Go to "3gpp2.org" site. It exsited floating, Fixed source code and test vector in the site. Good lucky!! ---------> ???? ???? ???? <---------- > Title : [speechcoding] Selectable Mode Vocoder - (SMV) implementation > Date :

Hi, We have started working on SMV codec of 3GPP2. Can anyone please guide where can we get the reference source code for SMV...

Hi, We have started working on SMV codec of 3GPP2. Can anyone please guide where can we get the reference source code for SMV (Selectable Mode Vocoder) implementation? regards Bis ________________________________________ Biswajit Biswas ________________

Hi, Anyone here know a method to adjust timing of 22.5ms speech frames to 20ms. I am working with different vocoders including AMBE (Advanced...

Hi, Anyone here know a method to adjust timing of 22.5ms speech frames to 20ms. I am working with different vocoders including AMBE (Advanced Multiband Excitation) versus CELP/VSELP. The generated vocoder frames are originally 22.5ms, but the vocoder DSP chip takes in 20ms. Basically, are there techniques that exist such as time compression, post-filtering/processing, duplicating speech fra...

I am implementing a Jitter buffer for VOIP application. We use AMR as speech vocoder. I need to throw away some packets. I would like to...

I am implementing a Jitter buffer for VOIP application. We use AMR as speech vocoder. I need to throw away some packets. I would like to throw packetes that have low energy content. the vocoder code is not mine so I can't do the full decoding to find out the result enegry of the frame. Is there a gain decoded in the amr packet that I can get quick estimation of the frame energy? I lo...

Dear friends I am looking for fixed point C source code of a vocoder in 1200, 800 or 600 bps. is there any one to help me? BR, Shahram

Dear friends I am looking for fixed point C source code of a vocoder in 1200, 800 or 600 bps. is there any one to help me? BR, Shahram

Does anyone know of a vocoder "standard" that implements the cepstrum, or mlsa (mel log spectral approx). If a standard exist, should...

Does anyone know of a vocoder "standard" that implements the cepstrum, or mlsa (mel log spectral approx). If a standard exist, should it use the cepstrum for complete source filter model or just pitch detection?? Any suggestions would be much appreciated. Thanks, JC

Could any one help me where i could find more information and sources on 1200 bps vocoder. Regards james kan

Could any one help me where i could find more information and sources on 1200 bps vocoder. Regards james kan

Dear members! I need different test vectors (preferably standard test vectors) for testing MELP 2400bps voice coding...

Dear members! I need different test vectors (preferably standard test vectors) for testing MELP 2400bps voice coding standard. I am in the process of implementing MELP 2400 vocoder on different platforms and i need test vectors to test for thier validity. Are

All, Does anybody know where I can find the ITU specification that specifies the Packet Loss Concealment Algorithms for the...

All, Does anybody know where I can find the ITU specification that specifies the Packet Loss Concealment Algorithms for the G723.1 vocoder? Thank you in advance! Daniel Tan

Hi friends, I'm implementing the FR GSM vocoder with MATLAB software. However, i'm not able to correctly decode what has been...

Hi friends, I'm implementing the FR GSM vocoder with MATLAB software. However, i'm not able to correctly decode what has been coded via encoder. Please let me know if anybody has implemented GSM 06.10 with MATLAB. Regards Javad

Hello, I am looking for information about phase distribution in my vocoder (Matlab model of some kind of MBE vocoder, but some...

Hello, I am looking for information about phase distribution in my vocoder (Matlab model of some kind of MBE vocoder, but some parameters are detected by Analyse-by-Synthese ). I have pitch frequency, amplitudes of each harmonics (spectral envelope), and phases. So I can

Hi, I am working on an old two-way radio simulation project running on 8000bps sampling rate using the VSELP vocoder. Does anyone here...

Hi, I am working on an old two-way radio simulation project running on 8000bps sampling rate using the VSELP vocoder. Does anyone here still have the IS-54 VSELP source code or at least a sample of sotchastic codebook parameters(1024 with order of 10)? Not sure, if it's really GSM-HR. Perhaps, something similar to this bit allocation: (from an old TI tech paper) MODE 2b Voicing Mode ...

Hi, I am working on a MELPe vocoder at a rate higher than 2400bps. I just was trying to increase the number of LPC's to 12. And the code some...

Hi, I am working on a MELPe vocoder at a rate higher than 2400bps. I just was trying to increase the number of LPC's to 12. And the code some how introduces a tonal noise into the speech. If I increase the number of LPC's further, the noise in the reconstructed speech further increases. I give it a 21sec speech and there is a tone at about 1.65s and one at 14.5s. Did anybody try to increase t...

How can i do classification of speech from the LSF parameteres given from a split-band vocoder? I need to classify the speech into voiced...

How can i do classification of speech from the LSF parameteres given from a split-band vocoder? I need to classify the speech into voiced unvoiced and mixed excitation.I did a small research and i found that vector quantization is a good method for the classification of speech from the LSF parameters but i dont know how to implemend this in C programming.

You can go for ITU-T G.723.1 (11/96), and Annexxe A from 3gpp.org Thanks

You can go for ITU-T G.723.1 (11/96), and Annexxe A from 3gpp.org Thanks

Dear all ! I want to have any standard or GOOD test vectors for voice coders like MELP and G.723.1. Where can i find them.?....

Dear all ! I want to have any standard or GOOD test vectors for voice coders like MELP and G.723.1. Where can i find them.?. Is there a way for noise analysis of these voice coders.?> E.g . what would be the vocoder response to noise corrupting encoded bits.? R

hi all i'm working on quantizing the LSF can i use the LSF generated by the VOCODER g.723.1? and if so how can i get them....

hi all i'm working on quantizing the LSF can i use the LSF generated by the VOCODER g.723.1? and if so how can i get them. Thx a lot.

hi all i'm working on PLC with th g.723.1 vocoder when checking out the LSP frequencies i came up with some strange ...

hi all i'm working on PLC with th g.723.1 vocoder when checking out the LSP frequencies i came up with some strange frquencies knowing that 0 <= LSP <= pi !!! (i.e 4,.. 10,.. 80,... . . . . 210,.. 233.,

Does anyone know where I can get the source code for QCELP vocoder ?

Does anyone know where I can get the source code for QCELP vocoder ?

Hi all, Is there a standard of test sequences for the MELP vocoder ? If so, where could I find them ? Thanks, Eli. ...

Hi all, Is there a standard of test sequences for the MELP vocoder ? If so, where could I find them ? Thanks, Eli.