Hi All, My question in G.729B, Why are we taking a fractional pitch delay T1 used with a resolution of 1/3 in the range...

Hi All, My question in G.729B, Why are we taking a fractional pitch delay T1 used with a resolution of 1/3 in the range [58/3, 254/3] for the 1st subframe? Thanks & Regards, Pradeep

hi, anyone knowing the references/publications which describes the fractional pitch lag calculations described in the 3g...

hi, anyone knowing the references/publications which describes the fractional pitch lag calculations described in the 3g 26.190 standard. (section 5.7). I find it difficult to follow what they are saying there.... john

Hai, I want to know how the probability density function(in average distortion computation) required in determining the optimum...

Hai, I want to know how the probability density function(in average distortion computation) required in determining the optimum codebook in channel optimized vector quantization be implemented in C? Kindly answer me as early as possible. Regards, Gomathi

Hai, I want to know how a channel optimized matrix quantized codebook be designed? Is there any C source code availble on net? ...

Hai, I want to know how a channel optimized matrix quantized codebook be designed? Is there any C source code availble on net? If not ,how should it be designed? Anyone with idea please reply as early as possible. Thanxs, Gomathi

Hello everyone! I have a few doubts in the ACELP part of G.723.1 encoder. In G.723.1 ,ACELP is used for secondary residual...

Hello everyone! I have a few doubts in the ACELP part of G.723.1 encoder. In G.723.1 ,ACELP is used for secondary residual quantisation in 5.3 kbps rate mode.The algebraic stucture of the codebook allows for fast search procedures, since the excitation vecto

Dear all, In GSM-EFR, the mean of the innovation energy is needed for the quantization of the fixed codebook gain. The...

Dear all, In GSM-EFR, the mean of the innovation energy is needed for the quantization of the fixed codebook gain. The standard mentions that this energy is 36 dB. Could somebody tell me how this value was computed ? Thanks in advance, Giusy

Dear Sir/Mrs My research field is speech enhancement and want to know about bandwidth extension more. If any one have comprehensive...

Dear Sir/Mrs My research field is speech enhancement and want to know about bandwidth extension more. If any one have comprehensive information about these methods please help me to solve my problem about codebook method. I can not convert my LSF's coefficients for narrow band speech to wideband speech LSF's. Regards. Seyed Farid Mousavipour

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...

Dear All, I'm now doing a transcoder between the G.723.1 and Gsm AMR. as we all now the fixed codebook search algorithm in the...

Dear All, I'm now doing a transcoder between the G.723.1 and Gsm AMR. as we all now the fixed codebook search algorithm in the reference G.723.1 cost much MIPS. I wonder if there are any much efficient search algorithm exist! Your reply would be highly appreciated

dear All, I have some difficulties in understanding windowed sinc interpolation using FIR filter in adaptive codebook search...

dear All, I have some difficulties in understanding windowed sinc interpolation using FIR filter in adaptive codebook search process of CELP...(g729) anyone have some reference? thx a lot regards, arida

Hi, I saw that the G.729 has 3+3+4+4 bit to 4 type of gains (Codebook gains) does these bit can serve as an indication to frame...

Hi, I saw that the G.729 has 3+3+4+4 bit to 4 type of gains (Codebook gains) does these bit can serve as an indication to frame energy? thanks,

In g729 spec,about generation of the adaptive-codebook vector, the formula (40) is v(n) = sum[u(n-k+i)*b30(t+3i)]+... but analyse g729 float...

In g729 spec,about generation of the adaptive-codebook vector, the formula (40) is v(n) = sum[u(n-k+i)*b30(t+3i)]+... but analyse g729 float code, it maybe be v(n) = sum[u(n-k-i)*b30(t+3i)]+... Is there error in g729 spec? thanks!

1) What is algebraic celp is a Code Excited LP   There are some kind of code, and we can express code...

1) What is algebraic celp is a Code Excited LP   There are some kind of code, and we can express code in some ways

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