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Discussion Groups | Speech Coding
Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)
Search Results for "+amr +nb"
Re: share the information [2 Articles]
- Jul 20 1999
<> wrote:
original article: http://www.egroups.com/group/speechcoding/?start=9
> hi, every speech coding experts here. I have worked on variable rates
> codin... 
Re: No Subject
- Jul 27 1999
> i'm currently developing an algorithm about speech coding using DSP
> processor 16 bit fixed point TMS320C25. Because my program need to be
> operated in floating... Request the information.
HyungJung Kim - Jul 6 2000
Hello all, I am very interesting in speech. The compexity and memory size AMR codec and draft SMV was released.
For example,
... Re: Where to get IS 641 Speech codec?
Sara Grassi - Nov 24 2000
The IS-641 is a North American TDMA Cellular standard, so I do not
think the ETSI has it.
for the documentation :
http://www.tiaonline.org/standards/se... GSM EFR Vs GSM AMR
- Feb 28 2001
Nice to have found an interesting site to discuss speech
coding stuff.
On the first look it looks like GSM AMR and GSM EFR have
lot of commonolity. Standard... gsm amr
Mr kiran nayak - Sep 25 2001
Hello All,
I am working on GSM_AMR and would like to know of the
given test vectors which test vectors will give best
results of profiling when used for different... Senior Engineer (Speech and Video) needed in Red Bank, NJ [2 Articles]
s_boucheryah - Jan 15 2002
The Voice Enhancement Solutions division of NMS Communications is
looking for a senior engineer for multimedia gateway project with
speech signal processing and/or ... AMR Codec VAD [3 Articles]
Harsha - Jan 30 2002
Hi All,
Please let me know the actual difference between VAD option 1 and VAD Option 2 in the GSM AMR codec. Under what
conditi... AMR with RTP [3 Articles]
Harsha - Feb 8 2002
Hi All,
In RTP payload format for AMR, how is it that the sender side will
determine that the frame is severely damaged ?
(It is mentioned that if Q bit is not... GSM AMR - EFR Test Vectors
vipinpathak - Feb 15 2002
Hi All;
I want to know if there are additional Test Vectors for the GSM AMR
and EFR codecs, apart from the ones provided by the ETSI and 3GPP.
Thanks
Vipi... Additional 5 ms look-ahead delay in AMR12.2k
manoj garg - Mar 7 2002
Dear friends,
i am working on EFR compatible AMR. In one of the
documents presented at 3gpp meeting by Ericsson i find
the following statement:
"AMR 12.2 has 5 ... Fwd: Additional 5 ms look-ahead delay in AMR12.2k
Vinay M K - Mar 8 2002
Please refer to the document 3G TS 26.090 version 3.1.0 Release 1999
on Page 19. While for MR122 80 samples fdrom the previous frame is used
for other modes 40 samp... look-ahead in AMR why?
manoj garg - Mar 11 2002
Dear friends,
> i am learning AMR-NB. In the specifications i found
> that the look-ahead is used in all modes except
12.2k
> mode. my doubts are:
> 1- What i... bit rate algorithm in AMR
adangaja - Mar 26 2002
Dear All
Actually I am a new member of this mailing list. First of all my name
is adangaja, and I am in the last semester in STTTelkom Indonesia. I
have a proj... AMR [2 Articles]
phil_lancs2002 - Apr 9 2002
Hey
I'm working on a CELP AMR codec. The coder uses previous samples of
the input speech, for windowing or creating the past excitation.
So, my question is:... AMR IF2 format bit-stream decoding
biswasbiswajit - Apr 10 2002
Hi,
I am not able to decode the bit-stream syntax format of AMR IF2
(Octate frame stucture) as explained in Table A.2 of Annex A of
document Ts 26.101 V1.0.0. ... Few general queries on AMR [3 Articles]
subrata_etc - Apr 22 2002
hi friends,
I have just started working with AMR speech codec. I
would like post few general queries which are written
below....
1)What is the application of di... few fundamental questions on AMR speech coding
subrata chatterjee - Apr 23 2002
Hi friends,
I have some fundamental queries regarding AMR speech
codec.
1) Why we are using two windows in case of
12.2kbit/sec mode?
2)What is the u... Why high pass filtering and down scaling in pre processing [2 Articles]
subrata chatterjee - Apr 25 2002
hi friends,
In AMR speech codec why do we need to use high pass
filtering and down scaling in pre processing???
Again the technique of down scalling is not clear ... AMR decoder
biswasbiswajit - May 13 2002
Hi,
When implementing AMR decoder from scratch as explained in 3GPP
standard, I am facing lot of doubts. Decoding fucntions are not
explained properly in the stan... bit rate ??
hambali hambali - May 14 2002
hi,
i have some problem,.
1).how to determine bit rate in AMR ???
2) where i can find algortihm to determine the bit rate of
AMR ???
thanks
... synchronisation test sequences for GSM speech codecs [2 Articles]
ksvd prasad - May 14 2002
Hi,
I'm facing some problem when i'm ensuring
bit/frame synchronisation test sequences for GSM
speech codecs(HR/EFR/AMR) as specified by the
standard. In the st... NAMR test Vectors.
- May 21 2002
Hi All,
Narrow band AMR test vectors (26.074) are in two formats.
1. Bit Stream Format.
2. Parametric (No-Bit Stream) Format.
I have only test vectors for... fixed/algebraic codebook in 3GPP-AMR or G729
Mathew John - Jun 1 2002
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 t... AMR LSP quantization [2 Articles]
subrata chatterjee - Jun 18 2002
hi all,
Anybody experienced in AMR speech coding can please
tell something about LSP quantization. Actually i have
tried to understand it from the standard but i ... abt VAD algorithm 1 of AMR codec
Sameer Kibey - Jul 25 2002
Hi all!
i have a query regarding the VAD algorithm 1 used in GSM AMR speech codec.one of
the steps in this algo is the use of a filter bank. this bank consists o... Is there any fast fcb search algorithm for G.723.1
lily_yangzhou - Jul 28 2002
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... GSM AMR Ref. C Code analysis
prakash_sebastian - Sep 9 2002
Hi,
Can someone who has implemented the reference C code in DSP
assembly give me some inputs on:
1. How much of code similarity is there between the 8 bit rate... AMR coding mode determinating [3 Articles]
¤Ñ¤~ - Sep 13 2002
hi all,
I am wondering to know the procedure and which module that determinat
the AMR coding mode (different bit rate). Besides, please introduce
some referenc... help me about AMR in MMS?
Aulia Satia Ningrum - Sep 16 2002
Dear All...
i need help.
could somebody help me?
are there anyone have any documents about AMR
(Adaptive Multi-Rate) and MMS (Multimedia Messaging
Service)... EFR compatibale AMR.
- Oct 3 2002
Hi All,
How to convert exhisting AMR Speech codec, EFR compatible ?
At least theoritical details will be of great help.
Greetings
Gopalkrishna Puranik.
... Need information on BFI testing.
- Dec 26 2002
Hello Intellectuals,
Please share some information on BFI (bad frame indication) testing of
narrowband AMR speech codec.
I need answer for the following questi... AMR SID frames
urx - Jan 31 2003
Hello,
does anybody can tell me about AMR-NB SID frames why they are not fixed
size composed by nokia cellphone?
regards.
... Transcoder between G.729 & AMR & G.723.1
gray_1024 - Mar 28 2003
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 20... Similarity of GSM-FR /HR with GSM-AMR
biswasbiswajit - Apr 3 2003
Hi All,
I want to know if compatibility can be provided for GSM-AMR codec
along with GSM-FR and GSM-HR codec.
DO I have to develop the HR and FR seperately?... line spectral frequencies
auliasn - Apr 28 2003
dear all
i have some difficulties with some algorithms.
could anyone explain to me about the LPC and LSF (line spectral
frequencies) algorithms that are being ... regarding adaptive c/b in AMR encoder [2 Articles]
Sameer Kibey - May 19 2003
hi all
in the AMR standard, a signal called y[n] is used. it is the "filtered adaptive
codebook vector" and is defined as:
y[n] = v[n]*h[n] (read convolution o... AMR IF1 format - how to test? [6 Articles]
biswasbiswajit - Jun 6 2003
Hi everybody,
Can anybody suggest how to test AMR speech in IF1 format? 3GPP
reference code has not implemented this (only IF2 is implemented).
If anybody can ... AMR codec [2 Articles]
Syed Moinuddin - Jun 16 2003
Hi,
Where can I download FREE AMR codec. Is there any Wavelet Based
Speech codec FREELY available
Regards
Syed Moinuddin
... DTMF detection on a GSM AMR bitstream [3 Articles]
e_voice61 - Jun 29 2003
Hi all,
Do anyone know of a way to detect DTMF on a GSM AMR bitstream without
fully decoding it?
I will be happy to know if you can do it on ITU-T voice codecs...