further query in ACELP

Started by Sameer Kibey in Speech Coding17 years ago

Hi all! I have another interesting query on ACELP wrt G.723.1 (well, atleast i think its interseting!) As far as ACELP...

Hi all! I have another interesting query on ACELP wrt G.723.1 (well, atleast i think its interseting!) As far as ACELP goes, the search is performed in 4 nested loops, where in each loop the contribution of a new pulse is added. The objective is to maxime the


ACELP doubts

Started by Sameer Kibey in Speech Coding17 years ago

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


ACELP

Started by sezer umut in Speech Coding18 years ago

Hi, I am looking for information and resource related to ACELP coders. Can anyone suggest online resources? Thank you ...

Hi, I am looking for information and resource related to ACELP coders. Can anyone suggest online resources? Thank you


statistical characteristics ACELP

Started by mehdi_m_5442 in Speech Coding12 years ago 2 replies

hi can somebody please tell me about statistical characteristics a frame speech when that coded by ACELP? many thanks

hi can somebody please tell me about statistical characteristics a frame speech when that coded by ACELP? many thanks


Advantages & Disadvantages of ACELP & QCELP

Started by prob...@yahoo.com in Speech Coding13 years ago 1 reply

Hi, my name is Novi, I would like to know the advantages of disadvantages of ACELP & QCELP, when compared to CELP. Can anyone please tell me?...

Hi, my name is Novi, I would like to know the advantages of disadvantages of ACELP & QCELP, when compared to CELP. Can anyone please tell me? Thank you very much..


ACELP source code in C++ or C or "MATLAB"

Started by mehdi_m_5442 in Speech Coding12 years ago 1 reply

hi ,All friends I'm looking for ACELP source code in C++ or C or "MATLAB". Can anyone please know where to find this? Thank you

hi ,All friends I'm looking for ACELP source code in C++ or C or "MATLAB". Can anyone please know where to find this? Thank you


ACELP 12200 bps code request

Started by saeed tabrizy in Speech Coding15 years ago

Hi all friends . where can I get  "C" or "MATLAB" or "Simulink" code of 12200 bps ACELP codec ?   Shaerbaf ...

Hi all friends . where can I get  "C" or "MATLAB" or "Simulink" code of 12200 bps ACELP codec ?   Shaerbaf


CS-ACELP g.729 (interpolated LPC)

Started by Lingadevaru T S in Speech Coding18 years ago

Hi all, My Q is Why we use interpolated LPC coeff for the first subframe synthesis instead of Quantized LPC coeff itself? I...

Hi all, My Q is Why we use interpolated LPC coeff for the first subframe synthesis instead of Quantized LPC coeff itself? I mean to ask, In G.729 CS-ACELP codec for speech synthesis interpolated LPC coeff are used for the 1st subframe and Quantised LPC coeff are used for


Download Standard speech coders

Started by m_dj...@yahoo.com in Speech Coding13 years ago

Hi I want to download a source code (in c/c++ or c#) standards speech coders (MELP, ACELP, AMR_WB,...). Can you show me where I can do...

Hi I want to download a source code (in c/c++ or c#) standards speech coders (MELP, ACELP, AMR_WB,...). Can you show me where I can do that. Thanks


Re: Wave header format for mu-law and A-law

Started by Mark Lakata in Speech Coding16 years ago 2 replies

> I notice that mplayer2 can handle your ACELP example, but mplayer and Winamp cannot. > Is there a list somewhere of codecs...

> I notice that mplayer2 can handle your ACELP example, but mplayer and Winamp cannot. > Is there a list somewhere of codecs supported by WMP? Is it possible to create > user-defined plug-ins and additional codec identifier definitions for WMP so they can > ha


AMR-NB Optimization

Started by venkat ramanan in Speech Coding15 years ago 2 replies

Hai everybody, Can anybody suggest me a method to optimize the ACELP search in AMR-NB codec?(DFTS method) so that there is no...

Hai everybody, Can anybody suggest me a method to optimize the ACELP search in AMR-NB codec?(DFTS method) so that there is no reduction in speech quality when compared to original? I have already gone through some IEEE papers. But speech quality is not maintained. They reduced the


standard speech coder

Started by mouloud Djamah in Speech Coding12 years ago 2 replies

Hi I am looking for source code (C/C++) standard speech coder (FS MELP, ACELP, AMR_NB,....) to download or to buy. Is there official web site...

Hi I am looking for source code (C/C++) standard speech coder (FS MELP, ACELP, AMR_NB,....) to download or to buy. Is there official web site where I download them (for free or to buy them) Thanks


Code book search problem

Started by Anonymous in Speech Coding19 years ago

Hi, sorry for posting this url late but it will be helpful to all people working on ACELP g.729, g.723.1 , or FS1016 (to some...

Hi, sorry for posting this url late but it will be helpful to all people working on ACELP g.729, g.723.1 , or FS1016 (to some extent) please goto www.upsto.gov click search then search by patent number or goto www.getthepatent.com patentnum


fixed/algebraic codebook in 3GPP-AMR or G729

Started by Mathew John in Speech Coding17 years ago

Dear all, Can anyone give me/direct me to a DETAILED/any explanation of the fixed codebook(of G729)/algebraic codebook(of 3GPP...

Dear all, Can anyone give me/direct me to a DETAILED/any explanation of the fixed codebook(of G729)/algebraic codebook(of 3GPP AMR ACELP) with specific refrence to Qk = (x2Hck)^2 (d Ck)^2 (Rk)^2 --------- = ------ = ------- CkH HCk Ck phick Ek ...Equat


Depth first search in G729A speech coder

Started by Narasimha Rao B.V. in Speech Coding20 years ago 1 reply

Hi there, somebody please explain me about the depth first codebook search algorithm used in G729A (CS-ACELP). Also suggest...

Hi there, somebody please explain me about the depth first codebook search algorithm used in G729A (CS-ACELP). Also suggest some references (if any) to understand the logic behind the depth first search algorithm (specific to G729A codebook search). Th


EFR Code Book search

Started by ynitin in Speech Coding18 years ago

Hi, I am working on porting GSM Enhanced Full Rate (EFR) Speech codec on a customer DSP. Currently We are working on porting ACELP...

Hi, I am working on porting GSM Enhanced Full Rate (EFR) Speech codec on a customer DSP. Currently We are working on porting ACELP ( Code Book Search ) functions. I observed that the code book searh algorithm implemented in C code is complex and is very difficult to optimize in


MOS Score - G.726 ADPCM & G.729 CS-ACELP - Voice Quality issues?

Started by raju...@ngc.com in Speech Coding11 years ago

Hi DSP Related members, I am researching to find out information on the voice quality of codecs used for VoIP communication using networking...

Hi DSP Related members, I am researching to find out information on the voice quality of codecs used for VoIP communication using networking routers, switches and access devices. The main objective is that the MOS (Mean Opinion Score) should be greater than 3.82 on the scale of 1 (poor quality) and 5 (best quality). Is the Codec G.726 ADPCM (32 Kbps) with a MOS of 3.85 is used in the re...


3rd generation of moblie communications :c code ,matlab simulink, matlab s-function and dsp platform for amr encoder and decoder

Started by hoss...@yahoo.com in Speech Coding14 years ago

Hello, I am working on the topic that you see in the subject(3rd generation of moblie communications --> speech coding --> amr (ACELP)...

Hello, I am working on the topic that you see in the subject(3rd generation of moblie communications --> speech coding --> amr (ACELP) encoder and decoder) I have written the c code that is compatible with the needs that we want.and i made it`s decoder and encoder in exe file. now i want to bering it to matlab simulink to make it intarctive. the ne