Classifiers

Started by Swanand Deshpande in Speech Coding15 years ago

Hi, I am undertaking the task of Age categorization on the basis of speech. For that I am looking for different classifiers I might...

Hi, I am undertaking the task of Age categorization on the basis of speech. For that I am looking for different classifiers I might find useful. I was hoping if anybody can pass onto me information onAmplitude stability and Standard Deviation of pitch. I really would appreciate the help. Thank You in advance. Cheers, -- Sw


Query in Adaptive Codebook Search [Why resolution 1/3?]

Started by Pradeep Srinivasan in Speech Coding17 years ago

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


adaptive codebook - 3gpp 26.190

Started by Mathew John in Speech Coding18 years ago

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


pich estimation

Started by MANISH GUPTA in Speech Coding16 years ago

hi can i have some robust algorithm for estimating the pitch period of speech signals ===== Thanks & Regards ...

hi can i have some robust algorithm for estimating the pitch period of speech signals ===== Thanks & Regards *********************************************** Manish K. Gupta B-49 Aravali Hostel IIT Delhi -Hauz Khas, New-Delhi-110016 Ph:


SCALING OF LPC COEFFICIENTS

Started by mgencarellli in Speech Coding17 years ago 1 reply

I have written a LPC10 encoder which produces the reflection cofficients,gain, pitch parameters etc using a 6711. These values are ...

I have written a LPC10 encoder which produces the reflection cofficients,gain, pitch parameters etc using a 6711. These values are in floating point notation. What I want to know is how are these values are converted to a integer representation, for transmission, considering that for


waveform interpolation

Started by dr_simic in Speech Coding16 years ago 2 replies

I'm trying to implement WI codec,for now just layer I(without quantisation),as it is described in Eddie Choy's thesis,but I don't...

I'm trying to implement WI codec,for now just layer I(without quantisation),as it is described in Eddie Choy's thesis,but I don't get perfectly sounding decoded speech,as they stated,there are audible errors,and these errors usually occur when pitch doubles. Can anybody help me,or send me


MBE

Started by Anonymous in Speech Coding17 years ago 1 reply

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


Problem about LPC-10 and LPC10e

Started by ytjiang2002 in Speech Coding15 years ago

Dear all, I'm involved in a project of speech coding of LPC10. And I downloaded the source of LPC10e, and found it's complex....

Dear all, I'm involved in a project of speech coding of LPC10. And I downloaded the source of LPC10e, and found it's complex. Especially the pitch tracking, voicing detection part. Is there any materials about the details of LPC10e? And another question:


cepstrum vocoder

Started by jefcg in Speech Coding14 years ago

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


Method of Finding LPC Coefficients for Digital Filter

Started by alexandra3753 in Speech Coding10 years ago

Hi, I'm doing some speech processing using Linear Predictive Coding, and I'm trying to use MATLAB to find the feedback coefficients, ai, for a...

Hi, I'm doing some speech processing using Linear Predictive Coding, and I'm trying to use MATLAB to find the feedback coefficients, ai, for a digital filter of the form y[n] = x[n] + Ʃ(ai * y[n-i]) (sum goes from i = 1 to i = N where N is the order of the filter) where n is the index of the sample point, y[n] is the output, x[n] is a pulse input with period equal to the pitch per


Needed help on generating a periodic spectrum

Started by vijay kura in Speech Coding17 years ago

Hello my friends and scholors As for i know that one method of generating periodic spectrum "|p(w) |" is to take the...

Hello my friends and scholors As for i know that one method of generating periodic spectrum "|p(w) |" is to take the Founrier transform magnitude of a windowed impluse train with pitch period P. I come across the ineteger multiples (like 40,50,...) of p


pitch predictor in celp

Started by tunkeat in Speech Coding15 years ago 4 replies

hi all, i am puzzled about the use of long-time predictor in celp. i see in some implementations, there is a long-time...

hi all, i am puzzled about the use of long-time predictor in celp. i see in some implementations, there is a long-time predictor (ltp) but in others, eg fs-1016, there isn't. if I understand correctly, the ltp is used to compute the gain. but why is there a need


confuse the G723.1 concept. Need some help!!

Started by m9021005 in Speech Coding16 years ago

I am novice at G723.1 and confuse some concept. I am Confuse with some variable in the Find_Acbk() of exec2.c. 1.ClPitchOrd=5 ...

I am novice at G723.1 and confuse some concept. I am Confuse with some variable in the Find_Acbk() of exec2.c. 1.ClPitchOrd=5 what does the variable mean? the LTP(Pitch predictor) filter order? 2. Hb = 3 + (Sfc & 1); what does the Hb mean? 3./* Filter the last o


Need info about the MELP bitstream format..?

Started by Khubaib in Speech Coding16 years ago 2 replies

Dear membes I need to know the bitstream format of the MELP's 54 bit frame.?. I know what are the different bits (the number of...

Dear membes I need to know the bitstream format of the MELP's 54 bit frame.?. I know what are the different bits (the number of bits for different parameters) in the bitstream, e.g. this is the 54 bit format Pitch index 7 Jitter flag 1 Bandpass voicing decision 4x1