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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 "gsm"
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... 
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?... MS GSM 6.10 - Specification [2 Articles]
paulzazzarino - Jun 23 2005
I am trying t0 measure the amplitude from an MS-GSM 6.10 data stream.
While 3GPP has specs on various GSM codecs, I am trying to wade thru
and determine what or where I can... implementation FR GSM vocoder with MATLAB
redundancy2000 - Nov 9 2002
Hi friends,
I'm implementing the FR GSM vocoder with MATLAB software. However,
i'm not able to correctly decode what has been coded via encoder.
Please let me ... difference between the CDMA and GSM and ITU-T Vocoders
Lingadevaru - Apr 22 2003
Hi all,
If any one knows the difference b/n CDMA, GSM and ITU-T vocoders, please
give your valuable inputs.
Why can't we use GSM vocoders itself in CDMA and vise ... 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... a doubt on half rate gsm implementation aspects.
Zij Nam - Jul 24 2001
Hi yahoos,
I am now using ansi c source for 1/2 rate
gsm for a software driven voice applicaton .
is it neccesary to use DTX, VAD in the minimum
implementati... GSM FR test sequence
skakkeri2002 - Feb 25 2003
Hi,
We are working on GSM-FR codec. When we feed any one of the following
test inputs to the decoder, the output is not matching with the
reference output prov... GSM HR Codec specifications
Harsha - Feb 11 2002
Hi All,
Please let me know the latest version of GSM HR codec specifications. Also,
the link to download them.
Thanks,
Harsha
... why different standards for GSM FR
skakkeri2002 - Apr 23 2003
Hi All
Can any body give reasons (apart from homing sequence)for having
different ETSI standards such as Phase2, phase 2plus, 3GPP for same
GSM FR. The implementa... My accuracy for GSM and CELP(4.8kbs) Is Low. Why?
Nash - Oct 17 2006
im new to speech coding. Currently im trying to calculate speech
recognition accuracy for TIMIT corpus which is coded using GSM and
CELP 4.8kbps coder. im using HTK toolkit.
... how to find the no of samples for a GSM file format, to put in the fact chunk ??
ashwinimanjunath - Jan 17 2006
hey,
can anyone give some information on how to find the no of samples for
a GSM file format.in case of GSM610 (or any other compression format
other than PCM) an addition... 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... GSM Full Rate DTX test vectors
achaupit - May 11 2004
Dear all,
I am currently working on the GSM FR speech encoder for my student
final year and I am experiencing some problem with the ETSI GSM FR
DTX test vector... mean of the innovation energy in GSM-EFR [2 Articles]
- Mar 30 2000
Dear all,
In GSM-EFR, the mean of the innovation energy is needed for the
quantization of the fixed
codebook gain. The standard mentions that this energy is 36... 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... GSM or CDMA//QCelp code in Matlab
Chipo Masawi - Aug 3 2003
Hey anyone!
Is there any GSM or CDMA//QCelp code in Matlab?
Chifa98
=====
You may be disappointed if you fail BUT you are doomed if you dont try!!!!! ... GSM half rate coder [6 Articles]
b_v_harsha - Sep 16 2002
Hello all,
I am on the lookout for a low bitrate speech coder which
works at 2 - 8 kbps and has a good quality.
also i am on the look out for the code for the ... GSM EFR EXTRA MODULE IN ORDER TO DECODE??? [3 Articles]
JH WANG - Mar 31 2005
Hi All,
I am currently implementing the GSM EFR vocoders. There is one thing
that i don't really understand.
After encoding a file, i have to pass the file to... GSM 06.71 [2 Articles]
Sarat Chandra, Kalyanam - Jul 1 2003
hi guys,
If anyone has the following ETSI document plz send it
to me,,, (that will be great help!!)
GSM 06.71: "Digital cellular telecommunications system ... GSM FR VAD function
yuehengs - Aug 22 2003
I built a code for GSM FR VAD, which can pass all test vector without
any problem. But when I test on board I notice if voice is not high
enough, (voice input's ... GSM FR homing sequence
skakkeri2002 - Jun 24 2003
Hi all
Has anybody checked GSM FR with homing sequence sync000.inp. Here we
are supposed to generate more sequences by modifying the given data
sync000.inp as exp... 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... Test vectors for GSM half rate Codec
errajith - Oct 17 2002
Hi all,
I have integrated half rate GSM codec for audio conferencing
applications. I had made some code optimizations in the source code
which i downloaded for fr... 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... Help reg. using full rate GSM test vectors from ETSI
Rajith M G - Nov 8 2002
Hi all,
I am currently using full rate GSM codec for our audio conferencing solution. As
far as the audio quality is concerned it is degraded a little bit due to... Filtering for input signals to the GSM EFR coder
Sara Grassi - Apr 23 2000
Hello, I am doing some work in Speaker Recognition on GSM coded
speech. Currently, I am doing experiments with the GSM EFR coder.
My speech database is sampled at 1... GSM algorithm [6 Articles]
ben_psxtreme - Jun 25 2004
Hi everybody !
I am a student achieving an internship in a mobile network company.
They have asked me to realize a GSM compression software. The best
solution,... Homing Test seq. in GSM FR(full rate) [3 Articles]
manoj_uor - Apr 16 2002
Hello friends,
I am working on GSM FR speech codec. The decoder is not passing the
homing test sequence. If the encoder is in homing state and input to
it is enco... doc on G.7XX speech coders
bubu_1212 - Sep 30 2003
Hi
I need to get quick view of what is going on in g.7xx and possibly
AMR/GSM.
Does any one has a good doc to send me?
Thanks
bubu
... Query: 13 bit PCM ? [2 Articles]
jay_coep - Dec 14 2004
Hello,
Can anybody please help explaining why GSM speech codecs (atleast
HR,AMR) prefer 13 bit uniform PCM encoding ? I mean what is so special
about '13... Where can I find a comparison list of perfrmance and complexity of codecs?
Yidan Zhou - Nov 13 2002
Hello all,
Anyone here know where I can find a comparsion of performance and
complexity for G.721, G.723, G726, G.723.1, G.729 and RPE-LTP(GSM)?
Thanks in adva... Re: Digest Number 403
David de Gaston - Jun 28 2004
On what platform do you wish to run the GSM 06.10 algorithm?
Dave s...@yahoogroups.com wrote:
------------------------ Yahoo! Groups Sponsor ... MOS algorithm
nina...@yahoo.com - Dec 6 2007
hi to all!!
i am working with GSM full rate speech Codec and i am
implementing it on MATLAB. Now i want to check the
Mean Openion Score of my decoded (.wav) file.
can anybody h... 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... Floating point to fixed point conversion
aditya_naidu1 - Apr 21 2005
Thank You all for your useful inputs.
Does any body know about any software or program that does the floating
point to fixed point conversion?
Is it possible ... 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... A/Mu-law testing of GSM-EFR codec
Sheng Mou - May 2 2002
Hi all,
According to ETSI doc "3GPP TS 06.54 v8.2.0" the EFR coder should
pass the Trau testing with a/mu-law test sequences, but I've seen some
failures even ... Notch and HP Filters
simha j - May 9 2002
hello all,
I was going through the GSM 06.10 ver 4.1.1 Doc
(ETSI.)
In this, while explaining offset compensation
(pre-processing) it is said that a Notch fil... Re: AMR-NB
nacer_ghoul - Feb 28 2005
hi mani,
doing the LPC over two overlapping windows permits to obtain a smooth
evolution of the LPC parameters (and therefore enhance the quality)
w...