Hi All, First of all, I'm new in speech coding. Some days ago, I got the G.729 Annex D source code from ITU's page. Now, I'm...

Hi All, First of all, I'm new in speech coding. Some days ago, I got the G.729 Annex D source code from ITU's page. Now, I'm involved in porting this code to our system, with a H8/2633 (16 bits) microcontroller, and my first attempt has been awful. ?Is it possible to do? ?Am I crazy?

Hi all: nice to meet you here. recently I test the ITU-T G.723.1 reference fixed point code. It works poorly. Even with the gcc...

Hi all: nice to meet you here. recently I test the ITU-T G.723.1 reference fixed point code. It works poorly. Even with the gcc option -O3 turned on, the coding of a frame of 30ms still takes 60ms on PII 500m machine. I tried to inline the basic operators,but the compiler seeem

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

Hello, My friends and scholors, I am looking for the reference on "line spectrum pairs representation of LPC...

Hello, My friends and scholors, I am looking for the reference on "line spectrum pairs representation of LPC coeeficients"... If anybody have references on this topic could you please send me? Thank you vijay

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

Hello Intellectuals, Please share some information on BFI (bad frame indication) testing of narrowband AMR speech codec. I...

Hello Intellectuals, Please share some information on BFI (bad frame indication) testing of narrowband AMR speech codec. I need answer for the following questions. 1. How BFI test vectors are generated ? What are the criteria that go in generating these test vecto

Dear experts, According to the ITU specs, in the G729A codec, input buffer size is 80 and output buffer is 82. Among these...

Dear experts, According to the ITU specs, in the G729A codec, input buffer size is 80 and output buffer is 82. Among these output values, the output[2] thro'h output[81] takes only 127 or 129 value. so I can replace this by a 0 or 1 respectively. Then I will have t

hi all, i'm implementing VAD/CNG/DTX algorithm and have problems with SID bitstream, in Comfort Noise payload...

hi all, i'm implementing VAD/CNG/DTX algorithm and have problems with SID bitstream, in Comfort Noise payload draft-ietf-avt-rtp-cn-05.txt and in ITU-T Recomendationg.729 annex B is said , that noise level should be packed in 5 bits, but in Comfort Noise payload draft-ietf-avt-rtp-cn-05.tx

Hi all, Now I am reading the standard documents and reference source code of G.723.1. There is an extra windowing multiplication...

Hi all, Now I am reading the standard documents and reference source code of G.723.1. There is an extra windowing multiplication in between the Levinson-Durbin recursion and autocorrelation coefficient calculation. But I do not know why this extra step is necessary. Could anybo

Hi all, I have got the answers to the previous three questions. 1. The combinatorial coding is an alternative to algebraic...

Hi all, I have got the answers to the previous three questions. 1. The combinatorial coding is an alternative to algebraic coding. It is a specialized branch of coding. But I do no know the details about it yet. 2. In any case, the postfilter emphasizes the smoothed spectral