dear list, im doing my thesis on quantization of speech parameters. i need more information on multi-stage vector quantization....

dear list, im doing my thesis on quantization of speech parameters. i need more information on multi-stage vector quantization. aside from the paper by LeBlanc, et.al (which i found difficult to understand esp. the training part), does anybody know of other resources on the jo

Hi everyone: I am working on the quantization of LSFs in G.723.1. I found that sometimes G.723.1 introduces a quite large ...

Hi everyone: I am working on the quantization of LSFs in G.723.1. I found that sometimes G.723.1 introduces a quite large percentage of outliers in the range of 2-4dB, for example, over 10%. So G.723.1 does not satisfy the transparent quantization? Is this correct? Could anyone

Dear All, I have some difficulties in understanding CELP coding process, one of them is about Mean-removed LSF vector and...

Dear All, I have some difficulties in understanding CELP coding process, one of them is about Mean-removed LSF vector and quantization of LSF coefficient (ETSI 06.09). For 7.95 kbps mode, the residual LSF is quantified using split vector quantization (SVQ). The re

My query is regarding the pre selection process done for quantization of gains in section 3.9.2 of ITU-T...

My query is regarding the pre selection process done for quantization of gains in section 3.9.2 of ITU-T recommendation for G.729 speech codec standa

Hi =20 I have questions and I hope that someone will reply me.=20 - I Know that for SVQ (Split vector quantization) design codebook for LSF...

Hi =20 I have questions and I hope that someone will reply me.=20 - I Know that for SVQ (Split vector quantization) design codebook for LSF = (line spectral frequencies) quantization, the centroid of each cell is calc= ulated as the mean of all vectors (belong to this cell) even if the weighte= d Euclidean distance is used while designing the codebook. This is to ensur= e that the LSF para...

Dear List: I was reading the book, "Speech Coding and Synthesis" by Kleijn & Paliwal. In page 445, from the table we see that for scalar...

Dear List: I was reading the book, "Speech Coding and Synthesis" by Kleijn & Paliwal. In page 445, from the table we see that for scalar quantization of the reflection coefficients, it costs 4 bits per parameter for 1 dB distortion. Similarly, in page 447, from the table we see that for LAR scalar quantization, it costs 3.2 bits per parameter for 1 dB distortion. The above numbers are for ...

Hi, I am working on low bit rate speech coding. I have efficiently quantized the lpc coefficients using vector quantization methods. I am...

Hi, I am working on low bit rate speech coding. I have efficiently quantized the lpc coefficients using vector quantization methods. I am looking at an efficient way of quantizing the residue signal which is an important by product of the lpc analysis. Can anyone suggest e a good method of quantizing the residue signals? With Regards, Abhishek S

Dear friends I am facing a problem regarding implemenatation of non uniform quantization. problem is: A parameter...

Dear friends I am facing a problem regarding implemenatation of non uniform quantization. problem is: A parameter wohose range is between -12 to 66 units I have to convert it into five bit information with following restrrictions

Hi I am working on Speex and it uses Subvector Shape Only VQ for innovation quantization. If any body knows the exact algorithm...

Hi I am working on Speex and it uses Subvector Shape Only VQ for innovation quantization. If any body knows the exact algorithm and any good source (paper/website) for understanding sub vector Quantization and the code book structures , kindly let me know. Also any body know ho

Hi guys, can anyone point to resources (papers etc.) on "Spilt Vector Quantization" / Algorithms ?? thanx Sarat ...

Hi guys, can anyone point to resources (papers etc.) on "Spilt Vector Quantization" / Algorithms ?? thanx Sarat

Hi dear all. I am doing a project on MELP. Now I want to undrestand Multi Stage Vector quantization. But I cant find a...

Hi dear all. I am doing a project on MELP. Now I want to undrestand Multi Stage Vector quantization. But I cant find a good text on it. Does any body know any resource for it. Any response is appriciated. yours sincerely.

Dear all, I have builded matlab functions over split matrix (SMQ) and split vector quantization (SVQ) in CELP but I am not so...

Dear all, I have builded matlab functions over split matrix (SMQ) and split vector quantization (SVQ) in CELP but I am not so sure about the results.... would you examine my works...please... my works is in the attachment thx alot, arida

hi friends can any one suggest me a good material to understand and implement "Vector Quantization".. waiting for u r...

hi friends can any one suggest me a good material to understand and implement "Vector Quantization".. waiting for u r suggestion.... thanx in advance ramu

hi all, Anybody experienced in AMR speech coding can please tell something about LSP quantization. Actually i have tried to...

hi all, Anybody experienced in AMR speech coding can please tell something about LSP quantization. Actually i have tried to understand it from the standard but i think it's not sufficient. So, please tell me address of any site from where i can collect some informations and

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.

I am working on speech recognition using vector quantization. I am able to generate codebooks for different words separately by using vq (LBG)....

I am working on speech recognition using vector quantization. I am able to generate codebooks for different words separately by using vq (LBG). But i don't know how to combine the codebooks of same words spoken by different speakers. Because that is very much required if i want to recognize a particular word spoken by different speakers. I want to create one single codebook for one word (spoken...

hi all, G.729 recommendation states:-to predict the values of LSF a 4th oreder MA is used.Two predictions are possible .the encoder...

hi all, G.729 recommendation states:-to predict the values of LSF a 4th oreder MA is used.Two predictions are possible .the encoder chooses which one to use and indices it with a bit in the bit stream. after prediction ,prediction error is computed .this error is sent to decoder by vector quantizing it. my que is what are these two possible predictions ? what is MA prediction? can any...

Dear all, I want to use wavelet analysis to decompose and reconstruct CWs based on biorthogonal FIR linear phase filter banks , but I have...

Dear all, I want to use wavelet analysis to decompose and reconstruct CWs based on biorthogonal FIR linear phase filter banks , but I have found that the time delay of 3-level wavelet decomposition of CWs is very high (about 6 speech frames). Can you tell me how to solve the delay problem? Does the wavelet method benefit to quantization and bits compression? Thank you!

Dear Members of the list: My question is related to quantization of Linear Prediction (LP) Parameters. I know very well...

Dear Members of the list: My question is related to quantization of Linear Prediction (LP) Parameters. I know very well that LP parameters are mapped onto Reflection Coefficients and we get a lattice filter. Now, lets say I have an order K Lattice filter: implying that I've a concatenation of first-order lattice

Hello I would be thankful if anybody who has tested the G729A source code by ITU can tell me if the QUA_GAIN function has been...

Hello I would be thankful if anybody who has tested the G729A source code by ITU can tell me if the QUA_GAIN function has been implemented exactly as the algorithm. I try to run it on Code Composer Studio C6000 simulator with various ITU test vectors and everytime I