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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"
Regarding AMR WB+ [3 Articles]
Ramana Reddy Polaka - Sep 28 2005
*Hi,*
* *
*Is anybody working on Extended AMR WB( AMR WB+ ) ? Please help me in the
following doubts.*
* *
1. *is it possible to integrate optimized AMR WB... 
AMR-WB+ decoder with AMR-WB files [2 Articles]
moha...@rediffmail.com - Dec 4 2007
Hi,
I have cross compiled the AMR-WB+ C reference code distributed as part of the 3gpp spec and it is able to decode the AMR-WB+ test files. Now my question is,
1.Will this de... AMR-WB and -WB+ complexity estimate
#ARIJIT BISWAS# - Jun 18 2008
Hi Speech-Coders:
I know the overall decoder complexity of AMR-WB and WB+.
Is there any source from where I could get a break-up of decoder complexity (in WMOPS) estimates for ... 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... 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)... AMR-NB codec : [2 Articles]
ashwin_c29 - Aug 4 2008
Hi All,
Had a small doubt regarding the AMR codec. Why is the file size (file
obtained at the output of an AMR-NB codec) constant for all AMR rates
even though there is a di... ASR and AMR-NB
epollarisg - Jul 15 2003
Hi,
Has anyone done practical tests with speech recognition and AMR? I am
wondering if the speech quality at lower AMR datarates is suffient
for ASR applicatio... 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 ... AMR-NB [3 Articles]
mani_assudani - Feb 28 2005
Hi friends,
I have implemented complete AMR-NB Enc-Dec on proprietary DSP chip.
As we know AMR-NB works on 8 rates from 12.2kb/s to 4.75kb/s.
One thin... Perceptual Weighting Filter in AMR-WB
#ARIJIT BISWAS# - Aug 29 2006
Dear Members of the List:
I have a question regarding the "perceptual weighting filter" used in the AMR-WB (also in the AMR-WB+) codec that is standardized in 3GPP and ITU.
Ple... 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... Test sequences for AMR Codec usage [2 Articles]
hazzyb4u - Jun 19 2006
Hi Everybody
I am working with the code Downloaded from 3GPP AMR Floating-point
Speech Codec (TS 26.104)..
i am looking at the Test sequences for AMR(3GPP TS 06.74 V7.3.0 )... Identify low energy AMR frames [4 Articles]
nir elkayam - Sep 1 2008
hi,
I am using AMR 4.75 and AMR 5.15 for Voip application over very small
bandwidth line.
I would like to identify low enery frame I order to Skip over them on
transmition.
... AMR codec (ETSI version v.s. 3GPP version) [3 Articles]
Murphy Chen - Jan 9 2004
ETSI has a AMR reference code.
3GPP also has AMR reference code for both fix-point and floating
point.
What's the difference between them?
Which version is p... AMR-NB Optimization [3 Articles]
venkat ramanan - Mar 15 2005
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 c... How to mix AMR files ? [2 Articles]
horiaciu - Jun 27 2007
Hello,
I am implementing a simple mixing program (i.e. create a new sound
file combinig two initial files - all the same format). I have
implemented this for WAV files (PCM)... Re: AMR-NB codec [3 Articles]
Ashwin Chandrasekaran - Aug 5 2008
Hi Rama,
Sorry about the confusion. I actually meant the file at the output of the AMR-NB encoder alone (not the decoded output) . Anyway, thanks for taking time to answer my ... AMR Reference Code Optimization
wu_donghui2000 - Jul 16 2003
Hi
Is there anyone here who has experence in the algorithm level
optimization of AMR?
Thanks a lot
... testing floating point versions of the NB-AMR and WB-AMR
sara_grassi - Nov 11 2003
Dear all,
I would like to know if for the floating point versions of the NB-AMR
and WB-AMR speech coders, there exist a standardized way of testing
the impleme... AMR light energy estimation [2 Articles]
nir....@gmail.com - Jul 23 2008
I am implementing a Jitter buffer for VOIP application.
We use AMR as speech vocoder.
I need to throw away some packets.
I would like to throw packetes that have low energy co... AMR IF1 Streams
simha j - Jan 9 2004
Hi all,
Can anyone in the group share the AMR IF1 test
vectors?
we badly need this for testing our modules.
Thanks & regards
Simha
__________... 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 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
... 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.
... AMR/G729 VADs as benchmark
smal...@yahoo.com - Aug 21 2005
Dear all,
I've downloaded the sourcecode for AMR speech codec (3GPP AMR reference ode).
This codec optionally uses one of the 2 VADs defined in the standard.
I wanted some... 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... Thanks and AMR
Ben - Jun 30 2004
Thanks to all of you, I have been on www.etsi.org and www.3gpp.org, and
found many interesting things. I have been told moreover than the last
evolution in speech c... 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... 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 ... 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?... 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... 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
... 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... 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... 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.
... AMR-fix Point- NB Data rate mismatching [2 Articles]
raghus - Aug 4 2006
Hi,
Plz help me to use AMR Fxd Point NB codec for VoIP application on
Pocket PC. Source code is downloaded from 3GPP & Tested with 3GPP test
vector.
But its not giving proper... 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... 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. ... 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 ...