info reg g.729

Started by gupta ksrc in Speech Coding17 years ago

hello every body. i am new member to this group.i have some doubts regarding g.729. we r doing a project on g.729 we...

hello every body. i am new member to this group.i have some doubts regarding g.729. we r doing a project on g.729 we couldn't get clear idea regarding the adaptive & fixed codebooks . we wish to know the contents of them & size of them in g.729 itz very cl


G.729 code in Matlab

Started by Jeet Bookseller in Speech Coding11 years ago

Hello, I am doing my graduation project on G.729 It would be great if I could get code in Matlab for G.729 implementation... Or...

Hello, I am doing my graduation project on G.729 It would be great if I could get code in Matlab for G.729 implementation... Or else just some guidance regarding how to go along with it from the ITU-T recommendation of G.729 in Matlab. Thanks Jeet


G.729 bitstream file format

Started by rishi_ahuja in Speech Coding15 years ago 3 replies

Hi! All, I have captured a G.729 call using Ethereal (in rtpdump payload format) and would like to use ITU G.729 decoder to...

Hi! All, I have captured a G.729 call using Ethereal (in rtpdump payload format) and would like to use ITU G.729 decoder to decode the conversation. Is there a utility available which would help me convert me the G.729 payload from rtpdump payload format to the bi


questions about G.723.1 and G.729

Started by Yidan Zhou in Speech Coding16 years ago 2 replies

Hello all, After I went through the standard document of G.723.1 and G.729, there are several technical terms I don't understand. ...

Hello all, After I went through the standard document of G.723.1 and G.729, there are several technical terms I don't understand. 1. In G.723.1, what is the combinatorial coding for transmitting the pulse location? 2. In G.729, Why a low-pass filter can act as a tilt compensati


Compression In G.729

Started by bine...@gmail.com in Speech Coding13 years ago 10 replies

Hi all, Now I am working with ITU-T's G.729 recommentation. I have one doubt.As you know In G.729 Codec the compression rate is 1/8. But...

Hi all, Now I am working with ITU-T's G.729 recommentation. I have one doubt.As you know In G.729 Codec the compression rate is 1/8. But here in 10 ms, 80 words(160 bytes) are compressed into 80 bits(10 bytes).Then how can we say this is 1/8th compression? Please clear my doubt. Thanks in advance Bineesh Jose


Difference among G.723, 729, 726

Started by Ramya Desai in Speech Coding14 years ago 1 reply

Dear Experts, I am new to this group and speech coding (But not to DSP) I want to know the details of G.723. But from ITU web ...

Dear Experts, I am new to this group and speech coding (But not to DSP) I want to know the details of G.723. But from ITU web site its not available and it recomended to use G.726 and G.729. What are the basic differences among G.723, G.726, G.729 ? How can I get G.723 standards ?. Regards, Ramya.


G.729 ITU-T c-code bitstream

Started by bnay...@gmail.com in Speech Coding9 years ago

While trying to implement g.729 coder on some raw file the output it gives is basically a bitstream file I mean a binary file. The binary file...

While trying to implement g.729 coder on some raw file the output it gives is basically a bitstream file I mean a binary file. The binary file actually contains some binary data stream like "00101010110111100101011001". should I convert to the desired pattern for g.729 by taking the stream from left if I want to achieve the coded format? I am not very sure whether g.729 coded data in the bitstream...


On G.729 Perceptual weighting and Gain Quantisation

Started by Thenral p in Speech Coding18 years ago 1 reply

Hi all, I am working on G.729 and when going thru' the C code I came across the folowing: In perceptual weighting filter to find...

Hi all, I am working on G.729 and when going thru' the C code I came across the folowing: In perceptual weighting filter to find the value of gamma2(weighting parameter) the formula used is gamma2=1-6.0*pi*dmin whereas in the G.729 code it is given as gamma2=1-6.0*


regarding speech.in file in G.729

Started by gupta ksrc in Speech Coding17 years ago 2 replies

hi everybody i have small doubt regarding g.729 implementation ... while i am trying to simulate the code given by ITU with...

hi everybody i have small doubt regarding g.729 implementation ... while i am trying to simulate the code given by ITU with speech.in file(which is given in g729tv2 folder of ITU site). for g.729 standard implementation they given in ITU site as test vecto


Transcoder between G.729 & AMR & G.723.1

Started by gray_1024 in Speech Coding16 years ago

I'm now doing a transcoder between G.729 & G.723.1. Considering the conversion of pitch delay, since G.723.1 encodes speech...

I'm now doing a transcoder between G.729 & G.723.1. Considering the conversion of pitch delay, since G.723.1 encodes speech with 30ms frames, while G.729 with 20ms frames, how can i do? I attempt to convert the pitch delay using linear interpolation, but the perform


G.729 in Matlab

Started by omsarmaru in Speech Coding15 years ago 1 reply

Hi, everyone Could someone help me locate Free Matlab source code for G.729? Om

Hi, everyone Could someone help me locate Free Matlab source code for G.729? Om


8 bits samples G.729

Started by T in Speech Coding16 years ago 5 replies

Hi list,   I'm involved in integrating G.729 algorithm.   I know that G.729 encodes with 16 bits samples but our...

Hi list,   I'm involved in integrating G.729 algorithm.   I know that G.729 encodes with 16 bits samples but our system provides 8 bits input, so I've allocated these 8 bits samples in


help required on G.729

Started by anand archak in Speech Coding18 years ago

Hi All, I am a new entrant 2 this group.I am working on G.729AB .So,i would like to know how to go about understanding the...

Hi All, I am a new entrant 2 this group.I am working on G.729AB .So,i would like to know how to go about understanding the technical details of the g.729 standards.Could u plz give some sites r book referrences other than the standards. Thanks! _______


Regarding LPC parameters in G.729

Started by cshs100 in Speech Coding15 years ago

Hi All, I am a beginner in speech processing area, In G.729 fixed point algorithm implementation, in the function...

Hi All, I am a beginner in speech processing area, In G.729 fixed point algorithm implementation, in the function Get_lsp_pol(),line 88,i.e after 2 for loop, why has he left shifting by 9 when in the standard he has shifted by one(i.e multiplied by 2). Can anyone help me?


G.729 Implementation question

Started by Anonymous in Speech Coding18 years ago

Hello, I am having a few problems with the G.729A: I downloaded G.729 Annex A from ITU's web site and when trying to ...

Hello, I am having a few problems with the G.729A: I downloaded G.729 Annex A from ITU's web site and when trying to implement it for some reason all the encoder algorythm does is reduce the amplitude and add a 4 byte spike at the end of every 80 bytes... is this what is


DTMF in G.729

Started by Bob Tausworthe in Speech Coding19 years ago 3 replies

I am reading a spec that states that G.729 is capable of conveying DTMF. Is this correct? I would have thought that G.711 would be...

I am reading a spec that states that G.729 is capable of conveying DTMF. Is this correct? I would have thought that G.711 would be required to accurately code DTMF. thanks in advance Bob Tausworthe


VAD

Started by lmaigrot in Speech Coding17 years ago

I'm a student and i'm working on voice activity detection. I use ITU-T recommendation G-729 annexe B. Some equations are missing...

I'm a student and i'm working on voice activity detection. I use ITU-T recommendation G-729 annexe B. Some equations are missing on my G-729.I'm looking for some informations about the window used by linear prediction, about the linear predictions and the line spectral frequencies


G.729B MIPS estimation

Started by Manish Arora in Speech Coding18 years ago

Hi All I am in a process of implenting G.729 B on a dsp processor. From the test vectors provided by itu is there any vector...

Hi All I am in a process of implenting G.729 B on a dsp processor. From the test vectors provided by itu is there any vector from which i can get the worst case mips of my encoder, decoder. Is there anybody reading this an expert on G.729 annex B algorithm internals and


Reg G.729A Speech coding

Started by arul rajan in Speech Coding12 years ago 3 replies

Hi everyone, I am from SSN college of engg doing ME . I need to use the g.729 codec for a PG project in Blackfin ADSP BF533 Could u send...

Hi everyone, I am from SSN college of engg doing ME . I need to use the g.729 codec for a PG project in Blackfin ADSP BF533 Could u send me the g.729 encoding / decoding algorithm ( C Coding ) or is there any web page with a detailed description of the encoding / decoding process please help me thanks in advance yours truly, arulrajan


Moving average Prediction Filter - G.729

Started by pchakre in Speech Coding17 years ago

Hello, In the Section 3.2.4 - Quantization of the LSP coefficients (Pg. 12) in ITU-T Recommendation G.729 documentation, we have...

Hello, In the Section 3.2.4 - Quantization of the LSP coefficients (Pg. 12) in ITU-T Recommendation G.729 documentation, we have to use two switched 4th order MA prediction filters to predict tha LSF coefficients. Can anyone please help me out as to which type of MA predictors